Couplings from Automotion
Our range of linkages and joints provides a wide range of solutions for providing connections in machinery in a variety of applications. Whether you need universal joints to connect shafts across an angle discrepancy or clevis joints for connecting to rods, we can provide you with the technical assistance and data you need for your application. We have both metric and inch sizing products where available.
Our range of ant-stiction air cylinders complements our range of linkages by providing smooth and efficient operation of applications attached to the joint.
Be sure to request your free catalogue here today and make use of our freely available CAD files on each product page.
Our huge range of beamed couplings includes: three beam, six beam, spiral, bellows, oldham and double disk designs with high rigidity clamp fixing.
Flexible couplings featuring plastic inserts to help absorb end play. Includes a variety of designs with materials from neoprene to silicone.
Rigid shaft couplings available in one piece and two piece designs in stainless steel or aluminium.
keyless locking devices featuring self-centering designs. Easy to install with full technical notes provided.
Stainless and regular steel shaft collars available in one or two piece designs.
Technical Specs
How to read diagrams
The joint capacity to transmit a regular torque at a constant load with no shocks, for a long period, mainly depends of the number of revolutions per minute and the inclination angle a° of the two axes. The diagram on the following pages are based on this. Each curve corresponds to the joint size (outside diameter "D") and represents the torque that the joint can transmit depending on speed and working angle a°.
The diagrams can be directly read if angle (a°) is 10°. For wider angles, torques are reduced, therefore these are to be corrected using the correction vales (F) relating to the angle shown in the table.
Important Note: Diagrams' values are merely indicative and refer to the single joints only. When choosing a double joint, you have to consider that they can transmit a torque about 10% lower than the same sized single joints. Each application has its own particular motion characteristics, such as: shock loads, motion reversals, connected masses, kind of starting presence of elastic joints, stops and starts, etc..., that have to be considered when choosing the joint.
| Working angle a° | Correction value F |
| 5° | 1,25 |
| 10° | 1,00 |
| 15° | 0,80 |
| 20° | 0,65 |
| 25° | 0,55 |
| 30° | 0,45 |
| 35° | 0,38 |
| 40° | 0,30 |
| 45° | 0,25 |
Example
Known:
Power = 0,65 kW
RPM = 230
With working angle a°, F = 1, we get point P. Torque = 27Nm corresponding to joint size "D" = 25/26mm = Types R3688.016 and R3689.012
With working angle a 30°, F = 0,45 (kW 0,65: 0,45 = 1,44 kW) we get point P1 Torque = 60 Nm corresponding to joint size "D" = 32mm = Types R3688.020 and R3689.016
Consider that:
Torque Ratings for Plain Bearing Universal Joints
