SIT-LOCK® keyless locking elements available from jbj Techniques Limited

SHAFT LOCKING DEVICES 01 25

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Contents E & OE Page SIT-LOCK® Keyless Locking Elements (advantages) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 - 3 Formulas for correct use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 6 Table of coefficient K. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 - 8 Features - internal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 12 Applicationexamples ........................................................................... 13 ® SIT-LOCK 3 Internal locking device - self-centring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 - 15 ® SIT-LOCK 4 Internal locking device - self-centring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 - 17 ® SIT-LOCK4AInternallockingdevice-self-centring.................................................... 18-19 ® SIT-LOCK5AInternallockingdevice-self-centring.................................................... 20-21 ® SIT-LOCK 5B Internal locking device - self-centring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 - 23 ® SIT-LOCK 6 Internal locking device - self-centring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 - 25 ® SIT-LOCK 7 Internal locking device - self-centring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 - 27 ® SIT-LOCK 8 Internal locking device - self-centring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 - 29 ® SIT-LOCK 12 Internal locking device - self-centring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 - 31 ® SIT-LOCK 15 Internal locking device - self-centring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 - 33 ® SIT-LOCK 16 Internal locking device - self-centring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 - 35 ® SIT-LOCK 18 Internal locking device - self-centring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 - 37 ® SIT-LOCK 13 Internal locking device - self-centring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 - 39 ® SIT-LOCK 1 Internal locking device - not self-centring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 - 42 ® SIT-LOCK 2 Internal locking device - not self-centring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 - 45 ® SIT-LOCK 9 Internal locking device - not self-centring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 - 47 ® SIT-LOCK 10 Rigid joint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 - 49 ® SIT-LOCK Applicationexamples.................................................................. 50 ® SIT-LOCK Customised versions available on request. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 ® SIT-LOCK Application diagram for internal locking devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52 ® SIT-LOCK 11 Shrink disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 - 60 ® SIT-LOCK 14 Shrink disc . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 - 67 ® SIT-LOCK Application examples & customised versions available on request. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 - 68 ® SIT-LOCK Application diagram for external locking devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69 ® SIT-LOCK Locking devices for applications with high bending moments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 - 75 ® SITTaperBushingSER-SIT ..................................................................... 76-78 ® SERLOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 - 82 ® SIT-LOCK Monolock shaft to hub connections series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 - 86 SITCouplingrange............................................................................. 88-89 jbjTechniques’Productlist ....................................................................... 92 www.jbj.co.uk/couplings.html #DriveLineHarmony The details contained within this catalogue are reproduced in accordance with the latest information at publication of this catalogue. Errors & Omissions Excepted Last update: 21/01/2025 ® SIT-LOCK Keyless Locking Elements

Advantages compared to conventional systems ® SIT-LOCK Keyless Locking Elements 1 www.jbj.co.uk/couplings.html #DriveLineHarmony ® Advantages of SIT-LOCK on the shaft-hub connection compared with traditional systems Easy assembly and disassembly Both actions take place by locking and unlocking the clamping screws with common tools. The use of a torque wrench is only necessary when a more precise torque is required. Superior holding power The action of the clamping cones creates shaft clamping torque superior to a normal keyed hub. Overload protection ® When the pre-set torque is exceeded SIT-LOCK will slip, preventing the connected elements from being broken. ® Note: SIT-LOCK units are not friction couplings so, excessive slip will cause damage. Easy adjustment ® Combining the SIT-LOCK design of smooth cone action with superior holding power, the hub can be clamped at any position along a shaft, eliminating the need for lock washers, spacers, stop rings, etc. Precision location ® ® With the SIT-LOCK smooth cone action, the SIT-LOCK is ideal for clamping cams, timing devices, and indexing mechanisms accurately and precisely. Temperature -20°C to 150°C. ® Unlimited use possibilities SIT-LOCK units are suitable to connect any type of hub (flywheels, chainwheels, gears, levers, pulleys, eccentrics, coupling, etc). Various solutions in stock ® Available in stock in 10 different types, SIT-LOCK units can be utilized in a varied range of industrial applications. Ordering Code CAL 1 F25 /50 ® CAL: SIT-LOCK keyless locking devices Type Shaft diameter (mm) Outside diameter (hub bore) (mm) NOTE: For external locking devices the d diameter is indicated, not the d diameter w Performances Given values of transmissible torque, axial force, and pressure between shaft and hub are valid for a lubricated installation (friction coefficient μ=0,12). Both hub and shaft, as well as locking unit’s contact surfaces and screws, should be lubricated. Locking unit and screws are supplied already oiled. Always consider tolerances and roughness values per single locking unit. To avoid decrease of locking unit performances, do not use molybdenum disulfide lubricant or other substances that drastically reduce coefficient of friction. Design procedure ® For a correct functioning of SIT-LOCK , the transmissible torque M (stated in this catalogue) must always exceed the maximum torque in operation. So, in T ® selecting the SIT-LOCK dimensions, you must consider the start up torque could be even 4 times larger than the nominal one. The transmissible axial forces (F ) given in the tables are valid for cases where there is no torque. If it is necessary to transmit both a torque and an axial force ax (ex. helical gear), the following formula must be used: 2 2 M ≥ M + Fax•d (Nm) T a 2000 where: M = maximum torque to be transmitted (Nm) a F = axial force in operation (N) ax d = shaft diameter (mm) ( (

A shaft to hub lock is critical in the design of a mechanical transmission as an unsuitable choice could cause serious damage to the machine or system and result in economic loss. Shaft-hub coupling designs must take several parameters into account: » Assessing application loads: torque, bending moment, axial force, radial force. Stresses that may occur simultaneously; » Alternating loads, sudden starts and stops, very rapid acceleration; » Fatigue limits of the coupling components; » Suitable material use; » Frequent installation and removal requirements; » Fretting corrosion. As mentioned, coupling breakages could cause high economic damages due to: » Downtime and subsequent production loss; » Damage to other parts of the system; » Material damage to persons or property. Traditional shaft-hub locking systems include: » Feather keys » Key » Spline coupling » Interference coupling: forced We assess the features of traditional systems: Feather Keys Feather key couplings are the most commonly used. Assessing the disadvantages: » High concentration of stress on the shaft and hub due to the high pressure generated on the keyway sides. » Micro-movements caused by the lack of even contact can cause fretting corrosion making it difficult to remove. » Not recommended for alternating loads. Over time, the pressure generated on the keyway sides can widen it and cause the shaft or hub to break. Not recommended in damp environments. » The lack of contact over the shaft-hub surface may lead to oxidation, making it difficult to remove. » Cannot accept axial loads. » Not recommended for transmissions that require zero backlash. » Significant decrease in shaft strength due to the keyway. » Difficult axial and angular positioning. Keys Keyed shaft-hub couplings have the same disadvantages as feather key couplings and also cause significant hub-to-shaft concentricity error. Splined Profile This coupling has the following disadvantages: » Fretting corrosion from the lack of contact making it difficult to remove. » Significant decrease in shaft strength. » Increased cost as it is difficult to make. » Play between shaft and hub. » Difficult angular and axial positioning. » Not recommended in damp or dusty environments. » Lack of contact may impair removal. D Eccentricity Mt P P P P Key Hub Advantages compared to conventional systems ® SIT-LOCK Keyless Locking Elements 2 www.jbj.co.uk/couplings.html #DriveLineHarmony T d T Shaft Mt Shaft on feather key action Hub on feather key action Hub rotary shaft Feather Keys Keys Splined Profile

Advantages compared to conventional systems ® SIT-LOCK Keyless Locking Elements 3 www.jbj.co.uk/couplings.html #DriveLineHarmony Interference Fit Interference fit shaft-hub connections can be achieved by cooling the shaft or heating the hub. This type of connection is not widely used for the following reasons: » Requires tight tolerances. » Difficult to remove. » Locking area temperature changes. » The effect of the centrifugal force created by the hub can decrease transmissible torque. » Increased stress concentrated on the edges. Shaft strength depends on the type of coupling used As an example, we look at the following data. For a shaft with a diameter d equal to 50 mm, its shaft strength would match the diameter of: » 39 mm feather key coupling. » 35 mm splined shaft coupling. » 46 mm interference fit. » ® 49 mm SIT-LOCK coupling. Note Incorrect calculations that do not account for all the stresses in a shaft-hub coupling can cause irreparable shaft breakage. Below is an example of fatigue failure caused by shaft-hub locking using a feather key. SIT-LOCK® locking device coupling Simply by tightening the screws, SIT-LOCK® keyless locking devices create an axial force on the shaft and the hub that is spread over the entire contact surface. Unlike traditional systems, they offer numerous advantages. The main ones are listed below. Calculation ease All the information, transmissible torque, axial force limits, etc., can be found in the catalogue. No additional calculations are required. Installation and removal Quick and easy. When installing, the screws simply need to be tightened to the Ms value indicated in the table. For removal, however, the screws need to be loosened evenly. In addition, there are assembly threads that allow the coupled parts to unlock even under extreme conditions. Shaft and hub tolerances and surface finish Tight tolerances are not necessary. h8/H8 tolerances are typically used. Some products may allow for h11/H11 tolerances. All the information is available in the catalogue. Operating temperatures The values shown in the tables are valid for temperatures from -20 °C to +200 °C. For uses lower or higher than these values, please contact the jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk Simultaneous loads possible Using SIT-LOCK® locking devices allows simultaneous torque, axial force, bending moment and radial force. For further information or calculations, please contact the jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk Increased shaft strength The shaft has no slots and the pressure generated by tightening the screws does not cause any reduction of the shaft’s strength. This enables the diameter of the shaft to be reduced with the same stresses applied, leading to considerable savings on costs. Easy axial and angular adjustment ® Unlike conventional couplings, SIT-LOCK locking devices simply require placing the hub in the desired position relative to the shaft and tightening the screws. DMi DAe DMe DF

www.jbj.co.uk/couplings.html #DriveLineHarmony Oxidation protection Even in damp environments, the pressures created along the contact surfaces do not allow for oxidation, ensuring easy removal of the locked parts. No backlash ® Connection in transmissions using SIT-LOCK locking devices are perfectly rigid and there is no backlash that could impair motion transmission or machine precision over time. Recommended for applications subject to continuous alternating loads ® By using SIT-LOCK locking devices, the stresses generated by alternating or sudden loads are distributed over the entire surface of the shaft and not over a reduced section as occurs with traditional systems. Formulas for proper SIT-LOCK® locking device use By tightening the screws to the torque M indicated in the table, an axial force P occurs which generates a radial force N on the shaft and hub contact surfaces. s v The pressure generated on the shaft and hub determines the transmissible torque M indicated in the table. t Therefore: M = N • μ • d t 2 The coefficient of friction μ used to calculate the locking device transmissible torque M is: t 0.12 (oiled surfaces) for internal locking devices. 0.15 (dry surfaces) for external locking devices. This means that for the locking devices with calculated values, with a coefficient of friction μ 0.12, a higher torque can be transmitted without further increasing the screw tightening torque M. Contact jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk for further s clarifications and calculations. Avoid using molybdenum disulphide based lubricants or greases on the shaft and hub contact surfaces as this would considerably decrease the friction coefficient μ. Calculating the minimum hub diameter Dmin See the following pages. Screw tightening torque Ms Where necessary, the screw tightening torque Ms can be reduced. As a result, the transmissible torque M indicated in the tables decreases proportionally. t The same applies to the axial force limits F and the pressure generated on the shaft P and hub P . ax w n The tightening torque M can be decreased by 30% or 40% of the value indicated in the tables. s Temperature influence The values in the table are typically valid for applications from -20°C to +200°C. In extreme cases, it is possible to use them from -40°C to +300°C. For applications subject to high temperatures, we recommend using shafts and hubs with the same coefficient of thermal expansion. For more details, please contact jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk Formulas for Correct Use ® SIT-LOCK Keyless Locking Elements 4 Dmin

www.jbj.co.uk/couplings.html #DriveLineHarmony Applications with simultaneous torque and axial force SIT-LOCK® locking devices can simultaneously transmit torque Mt and tolerate an axial force F . The table shows the maximum permissible values. Where ax both values are present simultaneously, the transmissible torque M value decreases. t Below is the formula for calculating transmissible torque: 2 2 M = M+(F •d) tam t AXR 2000 M = permissible torque (Nm) tam M = torque stated in table (Nm) t F = required axial force (N) AXR d = shaft diameter (mm) Radial force influence The radial force F affects the contact pressure on the shaft and hub generated by the locking device. Radial force generates an increase in pressure P R n generated on the hub. It is highly important to calculate this value as it must be used to verify the minimum hub diameter D . min Δ = F Pn R D • H Δ = additional pressure on hub (N/mm²) Pn F = radial force applied (N) R D = external diameter of the locking device (mm) H = locking device outer ring width (mm) Safety factors The transmissible torque Mt and tolerable axial force F values stated in the catalogue must not be exceeded. The design phase should take any service ax factors into account. Applications on shafts with bores For use on a shaft with a bore corresponding to the pressure P , the maximum bore diameter d should be: w B d ≤ s • P • d B 0.2 - 1.6 w s0.2 The maximum bore dB will depend on the elastic load σ of the shaft material and the surface pressure P generated by the locking device (see table 0,2 w values). For hollow shaft applications, locking devices that generate low pressure are recommended. Calculating the minimum hub diameter Dmin ® To guarantee the torque transmission Mt indicated in the table when using a SIT-LOCK internal locking device, the screws must be tightened to a specific torque Ms. Tightening the screws creates a pressure on the shaft Pw and on the hub Pn. To calculate the minimum hub diameter D , the min formula generally used for measuring the thickness of thick-walled cylinders subject to high internal pressure is used. The formula for calculating D is: min D ≥ D • K min D = outer diameter of the locking device in mm K = application coefficient See table below. The coefficient K is given by the following formula: K = s +(X•P ) 0.2 n s -(X•P ) 0.2 n Where: σ = hub material elastic limit in N/mm² 0,2 X = factor depending on hub shape and width P = surface pressure on the hub n Formulas for Correct Use ® SIT-LOCK Keyless Locking Elements 5 ( (

www.jbj.co.uk/couplings.html #DriveLineHarmony To simplify calculations, our Technical Department has drawn up a table for the coefficient K on the following page. Example calculation of minimum hub diameter Dmin Using the SIT-LOCK® 5B locking device to connect a shaft d = 50 mm with a hub made out of a material that has an elastic load σ0,2 = 500 N/mm², and a shape type and hub width equivalent to X=1. ® From the SIT-LOCK 5B 50 x 80 table, the outer diameter D is equal to 80 mm, the pressure P on the hub is equal to 70 N/mm². n In the table on the next page, by taking the P value (70 N/mm²), the X value (1) and of the elastic load σ of the hub material (500 N/mm²), coefficient K can be n 0,2 found to be 1.15. Therefore: D ≥ D • K ≥ 80 • 1.15 ≥ 92 mm min APPLICATION A X=1 APPLICATION B X=0,8 APPLICATION C X=0,6 D ≥ 2H Dmin D Dmin ≥ 2H D Dmin ≥ 2H D Dmin ≥ 2H D d Dmin ≥ H D Dmin ≥ H Formulas for Correct Use ® SIT-LOCK Keyless Locking Elements 6

www.jbj.co.uk/couplings.html #DriveLineHarmony Pressure on hub X factor Elastic load of hub material σ0,2 [N/mm²] Pn [N/mm²] Application type 150 180 200 220 250 270 300 350 400 450 500 600 Hub material GG20 GG25 GG30 GS45 GGG40 St50-2 GGG50 GGG60 GGG70 Tempering steels GS38 GTS35 St37-2 GS52 C35 St60-2 St70-2 C60 50 A X=1 1,41 1,33 1,29 1,26 1,22 1,21 1,18 1,15 1,13 1,12 1,11 1,09 B X=0,8 1,31 1,25 1,22 1,20 1,18 1,16 1,14 1,12 1,11 1,09 1,08 1,07 C X=0,6 1,22 1,18 1,16 1,15 1,13 1,12 1,11 1,09 1,08 1,07 1,06 1,05 55 A X=1 1,47 1,37 1,33 1,29 1,25 1,23 1,20 1,17 1,15 1,13 1,12 1,10 B X=0,8 1,35 1,28 1,25 1,22 1,19 1,18 1,16 1,13 1,12 1,10 1,09 1,08 C X= 0,6 1,25 1,20 1,18 1,16 1,14 1,13 1,12 1,10 1,09 1,08 1,07 1,06 60 A X=1 1,53 1,41 1,36 1,32 1,28 1,25 1,22 1,19 1,16 1,14 1,13 1,11 B X=0,8 1,39 1,31 1,28 1,25 1,21 1,20 1,18 1,15 1,13 1,11 1,10 1,08 C X=0,6 1,28 1,22 1,20 1,18 1,16 1,14 1,13 1,11 1,09 1,08 1,07 1,06 65 A X=1 1,59 1,46 1,40 1,36 1,30 1,28 1,25 1,21 1,18 1,16 1,14 1,11 B X=0,8 1,44 1,35 1,30 1,27 1,24 1,22 1,19 1,16 1,14 1,12 1,11 1,09 C X=0,6 1,30 1,25 1,22 1,20 1,17 1,16 1,14 1,12 1,10 1,09 1,08 1,07 70 A X=1 1,66 1,51 1,44 1,39 1,33 1,30 1,27 1,22 1,19 1,17 1,15 1,12 B X=0,8 1,48 1,38 1,33 1,30 1,26 1,23 1,21 1,18 1,15 1,13 1,12 1,10 C X=0,6 1,33 1,27 1,24 1,21 1,18 1,17 1,15 1,13 1,11 1,10 1,09 1,07 75 A X=1 1,73 1,56 1,48 1,43 1,36 1,33 1,29 1,24 1,21 1,18 1,16 1,13 B X=0,8 1,53 1,41 1,36 1,32 1,28 1,25 1,22 1,19 1,16 1,14 1,13 1,11 C X=0,6 1,36 1,29 1,26 1,23 1,20 1,18 1,16 1,14 1,12 1,11 1,09 1,08 80 A X=1 1,81 1,61 1,53 1,46 1,39 1,36 1,31 1,26 1,22 1,20 1,18 1,14 B X=0,8 1,58 1,45 1,39 1,35 1,30 1,27 1,24 1,20 1,18 1,15 1,14 1,11 C X=0,6 1,39 1,31 1,28 1,25 1,21 1,20 1,18 1,15 1,13 1,11 1,10 1,08 85 A X=1 1,90 1,67 1,57 1,50 1,42 1,39 1,34 1,28 1,24 1,21 1,19 1,15 B X=0,8 1,63 1,49 1,42 1,38 1,32 1,29 1,26 1,22 1,19 1,16 1,15 1,12 C X=0,6 1,42 1,34 1,30 1,27 1,23 1,21 1,19 1,16 1,14 1,12 1,11 1,09 90 A X=1 2,00 1,73 1,62 1,54 1,46 1,41 1,36 1,30 1,26 1,22 1,20 1,16 B X=0,8 1,69 1,53 1,46 1,40 1,34 1,31 1,28 1,23 1,20 1,18 1,16 1,13 C X=0,6 1,46 1,36 1,32 1,28 1,25 1,22 1,20 1,17 1,15 1,13 1,11 1,09 95 A X=1 2,11 1,80 1,68 1,59 1,49 1,44 1,39 1,32 1,27 1,24 1,21 1,17 B X=0,8 1,75 1,57 1,49 1,43 1,37 1,34 1,30 1,25 1,21 1,19 1,17 1,14 C X=0,6 1,49 1,39 1,34 1,30 1,26 1,24 1,21 1,18 1,15 1,14 1,12 1,10 100 A X=1 2,24 1,87 1,73 1,63 1,53 1,48 1,41 1,34 1,29 1,25 1,22 1,18 B X=0,8 1,81 1,61 1,53 1,46 1,39 1,36 1,31 1,26 1,22 1,20 1,18 1,14 C X=0,6 1,53 1,41 1,36 1,32 1,28 1,25 1,22 1,19 1,16 1,14 1,13 1,11 105 A X=1 2,38 1,95 1,79 1,68 1,56 1,51 1,44 1,36 1,31 1,27 1,24 1,19 B X=0,8 1,88 1,66 1,56 1,50 1,42 1,38 1,33 1,28 1,24 1,21 1,18 1,15 C X=0,6 1,56 1,44 1,39 1,34 1,29 1,27 1,24 1,20 1,17 1,15 1,14 1,11 110 A X=1 2,55 2,04 1,86 1,73 1,60 1,54 1,47 1,38 1,33 1,28 1,25 1,20 B X=0,8 1,96 1,71 1,60 1,53 1,44 1,40 1,35 1,29 1,25 1,22 1,19 1,16 C X=0,6 1,60 1,47 1,41 1,36 1,31 1,28 1,25 1,21 1,18 1,16 1,14 1,12 115 A X=1 2,75 2,13 1,93 1,79 1,64 1,58 1,50 1,41 1,34 1,30 1,26 1,21 B X=0,8 2,04 1,76 1,64 1,56 1,47 1,43 1,37 1,31 1,26 1,23 1,20 1,17 C X=0,6 1,64 1,50 1,43 1,38 1,33 1,30 1,26 1,22 1,19 1,17 1,15 1,12 120 A X=1 3,00 2,24 2,00 1,84 1,69 1,61 1,53 1,43 1,36 1,31 1,28 1,22 B X=0,8 2,13 1,81 1,69 1,60 1,50 1,45 1,39 1,33 1,28 1,24 1,21 1,18 C X=0,6 1,69 1,53 1,46 1,40 1,34 1,31 1,28 1,23 1,20 1,18 1,16 1,13 125 A X=1 3,32 2,35 2,08 1,91 1,73 1,65 1,56 1,45 1,38 1,33 1,29 1,24 B X=0,8 2,24 1,87 1,73 1,63 1,53 1,48 1,41 1,34 1,29 1,25 1,22 1,18 C X=0,6 1,73 1,56 1,48 1,43 1,36 1,33 1,29 1,24 1,21 1,18 1,16 1,13 130 A X=1 3,74 2,49 2,17 1,97 1,78 1,69 1,59 1,48 1,40 1,35 1,30 1,25 B X=0,8 2,35 1,93 1,78 1,67 1,56 1,50 1,44 1,36 1,30 1,27 1,24 1,19 C X=0,6 1,78 1,59 1,51 1,45 1,38 1,35 1,30 1,25 1,22 1,19 1,17 1,14 135 A X=1 4,36 2,65 2,27 2,04 1,83 1,73 1,62 1,50 1,42 1,36 1,32 1,26 B X=0,8 2,48 2,00 1,83 1,71 1,59 1,53 1,46 1,38 1,32 1,28 1,25 1,20 C X=0,6 1,83 1,62 1,54 1,47 1,40 1,36 1,32 1,27 1,23 1,20 1,18 1,15 140 A X=1 5,39 2,83 2,38 2,12 1,88 1,78 1,66 1,53 1,44 1,38 1,33 1,27 B X=0,8 2,63 2,07 1,88 1,75 1,62 1,55 1,48 1,39 1,33 1,29 1,26 1,21 C X=0,6 1,88 1,66 1,56 1,50 1,42 1,38 1,33 1,28 1,24 1,21 1,18 1,15 Table of coefficient K ® SIT-LOCK Keyless Locking Elements 7 continued overleaf . . .

www.jbj.co.uk/couplings.html #DriveLineHarmony Features - internal ® SIT-LOCK Keyless Locking Elements 9 ® SIT-LOCK 3 » Self-centering. » Low surface pressures. » Suitable for using on hubs with a low σ . 0.2 » Available for shaft diameters of 6 to 130 mm. » No axial displacement when tightening the screws. » Compact dimensions. » Medium to high transmissible torques. ® ® SIT-LOCK 4, SIT-LOCK 4A » Self-centring. » Even pressure distribution. » Very high transmissible torques. » Available for shaft diameters of 25 to 400 mm. » No axial displacement when tightening the screws. » Removal via extraction threads. » Excellent perpendicularity. ® SIT-LOCK 5A » Self-centring. » Even pressure distribution. » Available for shaft diameters of 18 to 200 mm. » Axial displacement when tightening screws. » Excellent shaft-to-hub perpendicularity. » High transmissible torques. » Quick installation and removal. ® SIT-LOCK 5B » Self-centring. » Low surface pressures. » Quick installation and removal. » Available for shaft diameters of 18 to 200 mm. » No axial displacement when tightening the screws. » Excellent shaft-to-hub perpendicularity. » Medium to high transmissible torques.

www.jbj.co.uk/couplings.html #DriveLineHarmony Features - internal ® SIT-LOCK Keyless Locking Elements 10 ® SIT-LOCK 6 » Self-centring. » Available for shaft diameters of 18 to 200 mm. » Axial displacement when tightening screws. » Optimal shaft-to-hub perpendicularity. » Reduced axial dimensions. » High transmissible torques. » Quick installation and removal. ® SIT-LOCK 7 » Self-centring. » Quick installation and removal. » Available for shaft diameters of 18 to 200 mm. » No axial displacement when tightening the screws. » Excellent concentricity and perpendicularity. » Medium to high transmissible torques. ® SIT-LOCK 8 » Self-centring. » Low surface pressures. » Quick installation and removal. » Available for shaft diameters of 14 to 50 mm. » No axial displacement when tightening the screws. » Excellent concentricity and perpendicularity. » Medium to high transmissible torques. ® SIT-LOCK 12 » Self-centring. » Quick installation and removal. » Available for shaft diameters of 18 to 90 mm. » Reduced axial dimensions. » Axial displacement when tightening screws. » Excellent shaft-hub concentricity and perpendicularity. » Medium to high transmissible torques.

www.jbj.co.uk/couplings.html #DriveLineHarmony Features - internal ® SIT-LOCK Keyless Locking Elements 11 ® SIT-LOCK 9, SIT-LOCK® 13 » ® Self-centring (SIT-LOCK 13). » ® Not self-centring (SIT-LOCK 9). » ® Easy installation/removal (SIT-LOCK 9). » Available for shaft diameters of 14 a 70 mm. » Axial displacement when tightening the locking nut. » ® Good perpendicularity (SIT-LOCK 13). » Medium to high transmissible torques. ® SIT-LOCK 15 » Self-centring. » Quick installation and removal. » Available for shaft diameters of 5 a 50 mm. » Slight axial displacement when tightening screws. » Excellent shaft-hub concentricity and perpendicularity. » Medium to high transmissible torques. » During assembly, it generates an axial force that can be used to axially clamp bearings or other components adjacent to the hub. ® SIT-LOCK 1 » Not self-centring. » Easy removal. » Available for shaft diameters of 17 a 600 mm. » Long assembly times due to high number of clamping screws. » Possible use on shaft-hubs with large tolerances (h11/H11). » Easy worldwide availability. ® SIT-LOCK 2 » Not self-centring. » Requires threads in the hub. » Requires a thrust flange. » Quick installation and removal. » Available for shaft diameters of 6 a 240 mm. » No axial displacement during assembly. » Medium to low transmissible torques.

www.jbj.co.uk/couplings.html #DriveLineHarmony Features - internal ® SIT-LOCK Keyless Locking Elements 12 ® SIT-LOCK 16 » Self-centring. » ® Effective alternative to SIT-LOCK 2: no flange or spacer required. » Quick installation and removal. » Available for shaft diameters of 14 to 65 mm. » Tolerance h8 for shaft, H8 for hub. » Axial displacement during assembly. » Medium to high transmissible torques. ® SIT-LOCK 10- rigid joint » Perfect axial alignment. » No backlash. » Quick installation. » Available for shaft diameters of 17 to 80 mm. » Tolerance h8 for shaft, H8 for hub. » Medium to high transmissible torques. ® SIT-LOCK 11- shrink disc » Easy installation/removal. » Available for shaft diameters of 14 to 1000 mm. » High torque. » Four available versions: ® SIT-LOCK 11S standard series (recommended). ® ® SIT-LOCK 11S 12.9 SIT-LOCK 11S with 12.9 screws. ® SIT-LOCK 11H heavy duty series. ® SIT-LOCK 11L lightweight series. ® SIT-LOCK 14 » Quick installation/removal » Available for shaft diameters of 12 to 1000 mm » Very high torques » Five available versions: ® SIT-LOCK 1422 standard series (recommended) ® ® SIT-LOCK 1481 SIT-LOCK 1422 with 12.9 screws ® SIT-LOCK 1423 heavy duty series ® ® SIT-LOCK 1483 SIT-LOCK 1423 with 12.9 screws SIT-LOCK® 1421 lightweight series

www.jbj.co.uk/couplings.html #DriveLineHarmony ® Locking a crusher flywheel using SIT-LOCK 4. ® SIT-LOCK 5A used for a timing belt pulley. ® Locking two shafts using SIT-LOCK 10, nickel-plated version. ® SIT-LOCK 1 used for a conveyor belt pulley. ® Locking the drive pulley of a cable car using SIT-LOCK 4. ® SIT-LOCK 1422 used to lock a hollow shaft. ® Mounting two pulleys using SIT-LOCK 3 without spacers. ® SIT-LOCK 3 used for a disc coupling. Application Examples ® SIT-LOCK Keyless Locking Elements 13 ® Locking the hollow shaft of a planetary gearset using SIT-LOCK 11. ® Locking a bellows coupling using SIT-LOCK 16.

www.jbj.co.uk/couplings.html #DriveLineHarmony 14 d Dmin D d D1 D H H0 H1 H2 Features Comprised of a split inner ring and outer ring, and a spacer which prevents the hub from moving relative to the shaft when tightening the screws. This locking device is particularly suitable for applications which require low hub pressures. Recommended for use with aluminium hubs or hubs with lower mechanical properties. The table shows performance data for the tolerances: shaft d h8 - coupling seat on hub H8 Do not use molybdenum disulphide-based oils or greases that reduce the coefficient of friction . The values in the table are calculated with 0.12 m m Hub to shaft centring ® The SIT-LOCK 3 locking device is self-centering so it does not require a centring base between the shaft and hub. This allows for hubs with reduced widths which saves on materials and leads to reduced costs. Installation with non-lubricated surfaces (dry) ® The SIT-LOCK 3 locking device is lubricated with oil before delivery to protect it from oxidation during storage. The values shown in the table have been calculated for applications with oiled contact surfaces. For dry installation, the values are: M , F +5% and P ,P -16% t ax w n To get these values, the locking device must be completely disassembled and all component surfaces must be cleaned with solvent. The shaft and hub contact surfaces must also be completely clean and oil-free. Axial displacement When tightening the screws there is no hub to shaft axial displacement. Radial loads ® The SIT-LOCK 3 locking device is suitable for applications subject to high radial loads. For further information, please contact the jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk Surface finish Normal surface finish is sufficient. The following values are recommended: R ≤ 3.2 μm - R ≤ 16 μm a t ® SIT-LOCK 3 applications without spacer ® Using SIT-LOCK 3 without a flange is not recommended because when the screws are being tightened, there would be a hub to shaft axial displacement. For spacer-free applications, the installation type shown in figure 1 is recommended. Installation The locking device is supplied ready to assemble. Clean the shaft contact surfaces thoroughly and apply oil. Mount the shaft, hub and locking device in the desired position. Screw tightening sequence Tighten two diametrically opposed screws until the locking device surfaces make contact with the shaft and hub. Tighten all screws to 50% of the screw tightening torque value Ms indicated in the table in a ‘criss-cross’ sequence. Repeat to 100% of the M tightening torque indicated in the table. In continuous s sequence, check that the tightening torque M has been achieved. s figure 1 ® SIT-LOCK 3 Internal Locking Device - Self-centring

www.jbj.co.uk/couplings.html #DriveLineHarmony ® SIT-LOCK 3 Internal Locking Device - Self-centring 15 Removal Gradually loosen the clamping screws. Remove the clamping screws and insert them into the special removal threads on the inner ring flange. Tighten the screws in a ‘criss-cross’ sequence until the locking device is released. Dimensions [mm] Clamping screws DIN 912 12.9 Values with tolerances for shaft h8/hub H8 d x D H H H H D Number Type 0 1 2 1 Ms [Nm] Mt [Nm] Fax [kN] Pw [N/mm²] Pn [N/mm²] 6 x 14 10 18,5 21 24 25 3 M3 2 11 4 154 65 7 x 15 12 22 25 29 27 3 M4 5 26 8 238 110 8 x 15 12 22 25 29 27 3 M4 5 30 8 209 110 9 x 16 14 23 26 30 28 4 M4 5 45 10 212 120 10 x 16 14 23 26 30 28 4 M4 5 50 10 191 120 11 x 18 14 23 26 30 32 4 M4 5 55 10 173 106 12 x 18 14 23 26 30 32 4 M4 5 60 10 159 105 13 x 23 14 23 26 30 38 4 M4 5 65 10 147 85 14 x 23 14 23 26 30 38 4 M4 5 70 10 136 85 15 x 24 16 29 36 42 45 3 M6 17 128 17 189 120 16 x 24 16 29 36 42 45 3 M6 17 136 17 177 120 17 x 26 18 31 38 44 47 4 M6 17 193 23 197 130 18 x 26 18 31 38 44 47 4 M6 17 205 23 186 130 19 x 27 18 31 38 44 49 4 M6 17 216 23 176 125 20 x 28 18 31 38 44 50 4 M6 17 227 23 168 120 22 x 32 25 38 45 51 54 4 M6 17 250 23 110 75 24 x 34 25 38 45 51 56 4 M6 17 273 23 101 70 25 x 34 25 38 45 51 56 4 M6 17 284 23 97 70 28 x 39 25 38 45 51 61 6 M6 17 478 34 129 95 30 x 41 25 38 45 51 62 6 M6 17 512 34 121 90 32 x 43 25 38 45 51 65 6 M6 17 546 34 113 85 35 x 47 32 45 52 58 69 8 M6 17 796 45 108 80 38 x 50 32 45 52 58 72 8 M6 17 864 45 99 75 40 x 53 32 45 52 58 75 8 M6 17 910 45 94 70 42 x 55 32 45 52 58 78 8 M6 17 955 45 90 70 45 x 59 45 62 70 78 86 8 M8 41 1.891 84 110 85 48 x 62 45 62 70 78 87 8 M8 41 2.017 84 103 80 50 x 65 45 62 70 78 92 8 M8 41 2.101 84 99 75 55 x 71 55 72 80 88 98 9 M8 41 2.600 95 83 65 60 x 77 55 72 80 88 104 9 M8 41 2.836 95 76 60 65 x 84 55 72 80 88 111 9 M8 41 3.073 95 70 55 70 x 90 65 86 96 106 119 9 M10 83 5.254 150 88 70 75 x 95 65 86 96 106 126 9 M10 83 5.630 150 82 65 80 x 100 65 86 96 106 131 12 M10 83 8.006 200 102 80 85 x 106 65 86 96 106 137 12 M10 83 8.507 200 96 80 90 x 112 65 86 96 106 144 12 M10 83 9.007 200 91 75 95 x 120 65 86 96 106 149 14 M10 83 11.092 234 100 80 100 x 125 65 86 96 106 154 18 M10 83 15.012 300 123 100 110 x 140 90 114 128 140 180 12 M12 145 16.029 291 78 60 120 x 155 90 114 128 140 198 12 M12 145 17.486 291 72 55 130 x 165 90 114 128 140 208 16 M12 145 25.257 389 88 70 M Screw tightening torque Nm s M Transmissible torque Nm t F Transmissible axial force kN ax P Pressure on shaft N/mm² w P Pressure on hub N/mm² n IMPORTANT: The screw tightening torque M can be reduced by 40% of the value indicated in the table. s M , F , P , P decrease proportionally. t ax w n For further information and larger diameters or dimensions different to those in the table, please contact the jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk ® SIT-LOCK 3 internal locking device - self-centring

www.jbj.co.uk/couplings.html #DriveLineHarmony 16 Features Composed of two tapered rings and one outer ring with a split. It is particularly suitable for applications that require high torque transmission. The table shows performance data for the tolerances: shaft d h8 - coupling seat on hub H8 Do not use molybdenum disulphide-based oils or greases that reduce the coefficient of friction . The values in the table are calculated with 0.12 m m Hub to shaft centring ® The SIT-LOCK 4 locking device is self-centring so it does not require a centring base between the shaft and hub. This allows for hubs with reduced widths which saves on materials and leads to reduced costs. Installation with non-lubricated surfaces (dry) ® The SIT-LOCK 4 locking device is lubricated with oil before delivery to protect it from oxidation during storage. The values shown in the table have been calculated for applications with oiled contact surfaces. For dry installation, the values are: Mt , Fax +5% Pw , Pn -16% To get these values, the locking device must be completely disassembled and all component surfaces must be cleaned with solvent. The shaft and hub contact surfaces must also be completely dry. Axial displacement When tightening the screws there is no hub to shaft axial displacement. Radial loads ® The SIT-LOCK 4 locking device is suitable for applications subject to high radial loads. For further information, please contact the jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk Surface finish Normal surface finish is sufficient. The following values are recommended: R ≤ 3.2 μm - R ≤ 16 μm a t ® Applications with more than one SIT-LOCK 4 device ® Where two SIT-LOCK 4 locking devices are mounted in a row, the total transmissible torque M is: t 1 device M = M indicated in catalogue t t 2 devices M = M indicated in catalogue ∙ 1.9 t t Installation The locking device is supplied ready to assemble. Clean the shaft contact surfaces thoroughly and apply oil. Mount the shaft, hub and locking device in the desired position. Screw tightening sequence: Tighten four screws crosswise until the locking device surfaces make contact with the shaft and hub. Tighten all screws to 50% of the screw tightening torque value Ms indicated in the table in a ‘criss-cross’ sequence. Repeat to 100% of the M tightening torque indicated in the table. In continuous sequence, check s that the tightening torque M has been achieved. Installation is complete when all screws are tightened to the M tightening torque indicated in the table. s s ® SIT-LOCK 4 Internal Locking Device - Self-centring D d Dmin D d H H1 H2

www.jbj.co.uk/couplings.html #DriveLineHarmony ® SIT-LOCK 4 Internal Locking Device - Self-centring 17 Removal Gradually loosen the clamping screws and remove them from the locking device. Insert the screws into the front tapered bush removal threads and tighten them in a ‘criss-cross’ sequence until the front cone is completely removed. Do not tighten the screws to a value greater than the M tightening torque indicated s in the table. Insert the screws into the extraction threads of the outer ring’s central flange and tighten them in a ‘criss-cross’ sequence until the rear tapered bush is fully removed. Do not tighten the screws to a value greater than the M tightening torque indicated in the table. s Reusing the locking device When reusing the locking device, check all the surfaces are clean and show no obvious signs of deformation or seizing. Oil all surfaces and threads. Check the screws have not been deformed. Oil the screws and reinstall the components in their original places. M Screw tightening torque Nm s M Transmissible torque Nm t F Transmissible axial force kN ax P Pressure on shaft N/mm² w P Pressure on hub N/mm² n IMPORTANT: The screw tightening torque M can be reduced by 40% of the value indicated in the table. s M , F , P , P decrease proportionally. t ax w n For further information and larger diameters or dimensions different to those in the table, please contact the jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk Dimensions [mm] Clamping screws DIN 912 12.9 Values with tolerances for shaft h8/hub H8 d x D H H H Number Type 1 2 Ms [Nm] Mt [Nm] Fax [kN] Pw [N/mm²] Pn [N/mm²] 25 x 50 41 45 51 6 M6 17 849 68 176 85 28 x 55 41 45 51 8 M6 17 1.268 90 209 105 30 x 55 41 45 51 8 M6 17 1.358 90 195 105 35 x 60 41 45 51 8 M6 17 1.585 90 167 95 38 x 65 41 45 51 8 M6 17 1.721 90 154 90 40 x 65 41 45 51 10 M6 17 2.264 113 183 110 42 x 75 41 45 53 8 M8 41 3.514 167 258 140 45 x 75 41 45 53 8 M8 41 3.888 167 130 150 48 x 80 58 62 70 8 M8 41 4.016 167 159 95 50 x 80 58 62 70 8 M8 41 4.183 167 153 95 55 x 85 58 62 70 8 M8 41 4.602 167 139 90 60 x 90 58 62 70 10 M8 41 6.275 209 159 105 65 x 95 58 62 70 10 M8 41 6.798 209 147 100 70 x 110 70 76 86 10 M10 83 11.624 332 180 110 75 x 115 70 76 86 10 M10 83 12.455 332 168 105 80 x 120 70 76 86 12 M10 83 15.942 399 189 125 85 x 125 70 76 86 12 M10 83 16.938 399 178 120 90 x 130 70 76 86 12 M10 83 17.935 399 168 115 95 x 135 70 76 86 12 M10 83 18.931 399 159 110 100 x 145 92 98 110 12 M12 145 29.014 580 167 115 110 x 155 92 98 110 12 M12 145 34.575 629 165 115 120 x 165 92 98 110 14 M12 145 40.620 677 163 115 130 x 180 108 114 128 12 M14 230 51.753 796 150 105 140 x 190 108 114 128 14 M14 230 65.023 929 163 115 150 x 200 108 114 128 16 M14 230 79.620 1.062 174 125 160 x 210 108 146 162 16 M14 230 84.928 1.062 163 120 170 x 225 136 146 162 14 M16 355 109.736 1.291 148 110 180 x 235 136 146 162 16 M16 355 132.790 1.475 160 120 190 x 250 136 146 162 16 M16 355 140.167 1.475 151 115 200 x 260 136 146 162 16 M16 355 147.544 1.475 144 110 220 x 285 136 146 162 20 M16 355 202.873 1.844 164 125 240 x 305 136 146 162 22 M16 355 243.448 2.028 165 125 260 x 325 136 146 162 22 M16 355 263.735 2.028 152 120 280 x 355 138 148 168 20 M20 690 403.047 2.878 198 125 300 x 375 165 177 197 22 M20 690 475.020 3.166 170 135 320 x 405 165 177 197 22 M20 690 506.688 3.166 159 125 340 x 425 165 177 197 24 M20 690 587.297 3.454 163 130 360 x 455 188 202 224 22 M22 930 709.561 3.492 154 120 380 x 475 188 202 224 26 M22 930 885.159 4.658 173 135 400 x 495 188 202 224 26 M22 930 931.746 4.658 164 130 ® SIT-LOCK 4 internal locking device - self-centring

www.jbj.co.uk/couplings.html #DriveLineHarmony 18 Features Composed of two tapered rings and one outer ring with a split. It is particularly suitable for applications that require high torque transmission. The table shows performance data for the tolerances: shaft d h8 - coupling seat on hub H8 Do not use molybdenum disulphide-based oils or greases that reduce the coefficient of friction . The values in the table are calculated with 0.12 m m Hub to shaft centring The SIT-LOCK® 4A locking device is self-centering so it does not require a centring base between the shaft and hub. This allows for hubs with reduced widths which saves on materials and leads to reduced costs. Installation with non-lubricated surfaces (dry) ® The SIT-LOCK 4A locking device is lubricated with oil before delivery to protect it from oxidation during storage. The values shown in the table have been calculated for applications with oiled contact surfaces. For dry installation, the values are: Mt , Fax +5% Pw , Pn -16% To get these values, the locking device must be completely disassembled and all component surfaces must be cleaned with solvent. The shaft and hub contact surfaces must also be completely dry. Axial displacement When tightening the screws there is no hub to shaft axial displacement. Radial loads ® The SIT-LOCK 4A locking device is suitable for applications subject to high radial loads. For further information, please contact the jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk Surface finish Normal surface finish is sufficient. The following values are recommended: R ≤ 3.2 μm - R ≤ 16 μm a t ® Applications with more than one SIT-LOCK 4 device ® Where two SIT-LOCK 4 locking devices are mounted in a row, the total transmissible torque M is: t 2 devices M = M indicated in catalogue ∙ 1.9 t t Installation The locking device is supplied ready to assemble. Clean the shaft contact surfaces thoroughly and apply oil. Mount the shaft, hub and locking device in the desired position. Screw tightening sequence: Tighten four screws crosswise until the locking device surfaces make contact with the shaft and hub. Tighten all screws to 50% of the screw tightening torque value Ms indicated in the table in a ‘criss-cross’ sequence. Repeat to 100% of the M tightening torque indicated in the table. In continuous sequence, check s that the tightening torque M has been achieved. Installation is complete when all screws are tightened to the M tightening torque indicated in the table. s s ® SIT-LOCK 4A Internal Locking Device - Self-centring D d Dmin D d H H1 H2

www.jbj.co.uk/couplings.html #DriveLineHarmony ® SIT-LOCK 4A Internal Locking Device - Self-centring 19 Removal Gradually loosen the clamping screws and remove them from the locking device. Insert the screws into the front tapered bush removal threads and tighten them in a ‘criss-cross’ sequence until the front tapered bush is completely removed. Do not tighten the screws to a value greater than the M tightening torque s indicated in the table. Insert the screws into the extraction threads of the outer ring’s central flange and tighten them in a ‘criss-cross’ sequence until the rear tapered bush is fully removed. Do not tighten the screws to a value greater than the M tightening torque indicated in the table. s Reusing the locking device When reusing the locking device, check all the surfaces are clean and show no obvious signs of deformation or seizing. Oil all surfaces and the inside of the threads. Check the screws have not been deformed. Oil the screws and reinstall the components in their original places. M Screw tightening torque Nm s M Transmissible torque Nm t F Transmissible axial force kN ax P Pressure on shaft N/mm² w P Pressure on hub N/mm² n IMPORTANT: The screw tightening torque M can be reduced by 40% of the value indicated in the table. s M , F , P , P decrease proportionally. t ax w n For further information and larger diameters or dimensions different to those in the table, please contact the jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk Dimensions [mm] Clamping screws DIN 912 12.9 Values with tolerances for shaft h8/hub H8 ® SIT-LOCK 4A internal locking device - self-centring d x D H H H Number Type 1 2 Ms [Nm] Mt [Nm] Fax [kN] Pw [N/mm²] Pn [N/mm²] 25 x 55 32 40 46 6 M6 17 877 70 286 105 28 x 55 32 40 46 6 M6 17 982 70 256 105 30 x 55 32 40 46 6 M6 17 1.052 70 239 105 35 x 60 44 54 60 7 M6 17 1.432 82 163 80 38 x 75 44 54 62 7 M8 41 2.873 151 278 120 40 x 75 44 54 62 7 M8 41 3.025 151 264 120 42 x 75 44 54 62 7 M8 41 3.176 151 265 120 45 x 75 44 54 62 7 M8 41 3.403 151 235 120 48 x 80 56 64 72 8 M8 41 4.148 173 199 100 50 x 80 56 64 72 8 M8 41 4.321 173 191 100 55 x 85 56 64 72 9 M8 41 5.347 194 195 110 60 x 90 56 64 72 10 M8 41 6.482 216 199 115 65 x 95 56 64 72 10 M8 41 7.022 216 184 110 ® ® ® From diameters of 70 mm, SIT-LOCK 4A is the same as SIT-LOCK 4. For SIT-LOCK 4 dimensions and performance, refer to the table on page 19.

www.jbj.co.uk/couplings.html #DriveLineHarmony 20 Features Composed of an inner ring and outer ring both with splits. This type of locking device is particularly suitable for applications that require excellent hub-to-shaft concentricity and perpendicularity. The table shows performance data for the following tolerances: shaft d h8 - coupling seat on hub H8 Do not use molybdenum disulphide-based oils or greases that reduce the coefficient of friction . The values in the table are calculated with 0.12 m m Hub to shaft centring ® The SIT-LOCK 5A locking device is self-centering so it does not require a centring base between the shaft and hub. This allows for hubs with reduced widths which saves on materials and leads to reduced costs. Installation with non-lubricated surfaces (dry) ® The SIT-LOCK 5A locking device is lubricated with oil before delivery to protect it from oxidation during storage. The values shown in the table have been calculated for applications with oiled contact surfaces. For dry installation, the values are: Mt , Fax +8% Pw , Pn -13% To get these values, the locking device must be completely disassembled and all its component surfaces must be cleaned with solvent. The shaft and hub contact surfaces must also be completely clean and oil-free.. Axial displacement When tightening the screws there is a hub to shaft axial displacement. The extent of axial displacement depends on the tolerances. Radial loads ® SIT-LOCK 5A is suitable for use with applications subject to high radial loads. For further information, please contact the jbj Techniques Limited technical office, telephone: +44 (0)1737 767493 or email: info@jbj.co.uk Surface finish Normal surface finish is sufficient. The following values are recommended: R ≤ 3.2 μm - R ≤ 16 μm a t Installation The locking device is supplied ready to assemble. Clean the shaft contact surfaces thoroughly and apply oil. Mount the shaft, hub and locking device in the desired position. Screw tightening sequence: Tighten two diametrically opposed screws until the locking device surfaces make contact with the shaft and hub. Tighten all screws to 50% of the screw tightening torque value M indicated in the table in a ‘criss-cross’ sequence. Repeat to 100% of the M tightening torque indicated in the table. In continuous s s sequence, check that the tightening torque M has been achieved. s Removal Gradually loosen the clamping screws. Remove the clamping screws and insert them into the special removal threads on the inner ring flange. Tighten the screws in a ‘criss-cross’ sequence until the locking device is released. ® SIT-LOCK 5A Internal Locking Device - Self-centring D d Dmin D d H2 H H1 Ht

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