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Spidex® coupling
Application service factors, displacement (misalignment) values and torque ratings

 

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Spidex power transmission couplings are torsional flexible shaft couplings, the operating characteristics of which are two hubs with concave claws, transmitting the torque by meshing with an elastic involute gear ring.

The spider coupling concept gives a reliable, smooth power transmission without torsional oscillation / vibration and so protects the connected machines.
Due to the complete flexibility and ductility of the elastomer ring, it compensates for parallel and angular displacements as well as to absorb longitudinal movements of the shafts.

The involute teeth of the elastomeric inserts are crowned in order to avoid edge pressure on the tooth flanks and so avoid undesirable axial thrust. The puncture proof spider coupling can be loaded extremely high since the elastic elements are submitted to compression and not to bending moments of force. The elastomer gear ring, made of a newly developed Simirit-Polyurethane of various degrees of shore hardness, has important advantages in comparison with the standard polyurethanes. It is non-ageing, with resistance against hydrolysis (can be used in tropical conditions), non-abrasive, has a high self-damping effect and is also resistant to oil and ozone. It can be used with temperatures ranging from -400 °C to +1000 °C.

Spidex power transmission couplings can be used for horizontal as well as for vertical shaft connections, for reversing, intermittent service and are electrically insulating. The operating characteristics and the durability of the coupling are very positively influenced by the high overall precision of the machining, especially the claws, unbalance is reduced to a minimum, running is improved and service life considerably increased.

application service factors for the Spidex® coupling

Application Service Factor K1
 

Service Factor (K1)
Uniform operation with small masses to be accelerated.
Hydraulic and centrifugal pumps, light generators, blowers, fans, ventilators, belt/screw conveyors.

1.0
Uniform operation with medium masses to be accelerated.
Sheet metal bending machines, wood working machines, mills, textile machines, mixers.

1.2
Irregular operation, with medium masses to be accelerated.
Rotating ovens, printing presses, generators, shredders, winders, spinning machines, pumps for viscous fluids.

1.3
Irregular operation and shocks with medium masses to be accelerated.
Concrete mixers, drop hammers, cable cars, paper mills, compression pumps, propeller pumps, rope winders, centrifuges.

1.4
Irregular operation and heavy shocks with large masses to be accelerated.
Excavators, hammer mills, piston pump presses, rotary boring machines, shears, forge presses, stone crushers.

1.6
Irregular operation and very heavy shocks with very large masses to be accelerated.
Piston type compressors and pumps without speed variations, heavy roll sets, welding machines, brick presses, stone crushes.

1.8
 

Application service factor for starts
per hour
K2
Starts per
hour

100

200

400

800
Service factor (K2)

1.0

1.2

1.4

1.6


   
 

Application service factor for
ambient temperature
K3
Ambient temperature

-30 to +30°C

+40°C

+60°C

+80°C
Service factor

1.0

1.2

1.4

1.8

Total service factor for K = K1 x K2 x K3

displacement values for the Spidex® coupling
Valid for 1500rpm and for a given temperature range -25°C to +30°C. For other speeds and temperature ranges please contact
jbj Techniques technical office: tel: 01737 767493 or email: info@jbj.co.uk


Type

14

15

19

24

28

38

42

48

55

65

75

90

100

110

125

140

160

180

max. axial displacement (mm) x

0.6

0.6

1.2

1.5

1.5

1.8

2

2.1

2.3

2.6

3

3.4

3.8

4.2

4.6

5.0

5.7

6.4

max.angular displacement a

1.2

1.2

0.9

0.9

0.9

1.0

1.1

1.1

1.2

1.2

1.2

1.2

1.2

1.3

1.3

1.2

1.2

1.2

max.radial displacement (mm) g

0.17

0.17

0.20

0.22

0.22

0.28

0.32

0.36

0.38

0.42

0.48

0.50

0.52

0.55

0.60

0.62

0.64

0.68

torque ratings for the Spidex® coupling
* For peripheral speeds of over V = 30 m/s it is necessary to use either steel or SG iron. Dynamic balancing is also necessary.
** When using 64 shore hardness spider, steel and modular iron hubs should be used.
92° shore spiders (white) will normally be supplied unless otherwise specified.


For more information and dimensions of this series of couplings see the
on-line pdf catalogue »



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Contact us for expert help and advice -
power transmission couplings
jbj Techniques technical office: 01737 767493 or email: info@jbj.co.uk

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28 Trowers Way, Holmethorpe Industrial Estate, Redhill, Surrey RH1 2LW. United Kingdom of Great Britain. telephone: +44(0)1737 767493 email:info@jbj.co.uk
E. & O. E., Disclaimer: Information throughout this web-site relevant to design, materials and/or specifications are subject to change without notice and liability therefore.