www.jbj.co.uk/couplings.html #DriveLineHarmony 38 Features Composed of two tapered rings, an inner ring, a splits outer ring and a ring nut with locking washer. It is suitable for applications that require reduced radial and axial dimensions. Particularly suitable for applications without screw tightening space. The ring nut can actually be tightened from above using a special key of very reduced size. 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 The table shows the Mt - Fax - Pw and Pn values for applications where the hub axially locks a part. For applications that do not require this function, SIT-LOCK® 5A or 5B is recommended. Hub to shaft centring ® The SIT-LOCK 13 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. Axial displacement Application 1: When tightening the ring nut, there is no hub to shaft axial displacement. The values in the table are valid for application 1. Application 2: When tightening the ring nut, there is hub to shaft axial displacement. M, F , P and P values increase by 55% compared to the values shown t ax w n in the table. Surface finish Normal surface finish is sufficient. The following values are recommended: R ≤ 3.2 μm - R ≤ 16 μm a t ® Considering that using the SIT-LOCK 2 model requires tight tolerances, precise surface finishes, and additional accessory costs (flange, screw threads), ® using SIT-LOCK 13 is recommended. Installation ® Clean the shaft and hub contact surfaces thoroughly. Insert the shaft, the hub and SIT-LOCK 13 locking device in the desired position. Nut tightening sequence: Tighten the ring nut to the tightening torque M indicated in the table. Lock the ring nut using the appropriate locking washer as shown in the figure. s Removal Unlock the ring nut from the locking washer. Loosen the ring nut until the clamping set is fully removed. ® CAUTION: The SIT-LOCK 13 taper angle is approximately 4°. ® As the angle is less than the friction angle, removal may not be guaranteed. For applications that require removal, SIT-LOCK 9 is recommended. Reusing the locking device When reusing the locking device, check all the surfaces are clean and show no obvious signs of deformation or seizing. Clean and oil all surfaces and threads. Check the screws have not been deformed. Oil the screws and assemble the locking device as originally supplied. ® SIT-LOCK 13 Internal Locking Device - Self-centring D d Dmin X D d D1 H H1
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