Phone: (973)785-4630
Email: 1. Determine the maximum instantaneous torque the coupling will receive. If there is a clutch start or brake stop, measure the maximum instantaneous torque value. If a low inertia motor with gear reduction drives a massive load through the coupling, the maximum torque will be the starting torque of the motor, multiplied by the gear speed reduction ratio. Acceleration of rotational inertias generates resisting torques and the engineer must compute these and take them into account. Determination of true maximum torque can prevent premature coupling failure.
Note: When a coupling is used in a compressed state, use 75% of rated torque as maximum. If the coupling is to be extended during its operation, apply the normal torque rating.
2. Determine the maximum parallel misalignment to be encountered. Misalignment of shafts, with axes parallel but offset, is the severest load condition that can be applied to a coupling.
3. Determine the maximum angular misalignment expected to occur between the two shafts.
4. Specify maximum allowable windup of the coupling. Shorter lengths or larger diameters may be necessary where low windup values are required.
5. Determine whether the axial compression or extension of your application will require a special length of bellows.
6. Compare these five values to the performance chart in the various tables of standard couplings.
If you find that there is no standard bellows coupling to meet the requirements of your application, our engineers can design a special bellows coupling for your needs.
The typical rated life for Servometer stock couplings is 1 x 10⁸ cycles. However, couplings can also be used in severe motion applications for de-rated service life.
