Coupling Specs: oldham
Mechanical shaft coupling specifications for rotating equipment design. Covers 9 coupling types (jaw/spider, gear, disc/diaphragm, grid, Oldham, bellows, fluid, universal joint, rigid flange) in small/medium/large/extra-large size classes. Includes bore range, maximum torque, maximum speed, angular/parallel/axial misalignment limits, torsional stiffness, damping capability, service temperature range, maintenance requirements, typical applications, advantages, and limitations. Data from Rexnord Falk, Lovejoy/Timken, Thomas, Voith, Spicer/Dana catalogs and Shigley's handbook.
| coupling type | size class | advantages | bore range max in (in) | bore range min in (in) | damping capability | limitations | maintenance required | max angular misalignment deg (deg) | max axial misalignment in (in) | max parallel misalignment in (in) | max speed rpm (RPM) | max torque ft lb (ft-lb) | service temp max F (degF) | service temp min F (degF) | torsional stiffness ft lb per rad (ft-lb/rad) | typical applications |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| oldham | medium | Electrically isolates shafts; zero backlash at low torque; side load reduction | 2.5 | 0.5 | medium | Center disc wear under load; sensitive to large axial misalignment | no | 3 | 0.062 | 0.04 | 3,000 | 150 | 250 | -20 | 800 | Conveyors, small pumps, packaging machinery, medical devices |
| oldham | small | Constant velocity transmission; very forgiving to parallel misalignment; simple | 1.25 | 0.125 | medium | Low torque capacity; sliding center disc wears; not for high-speed/high-torque | no | 3 | 0.05 | 0.03 | 5,000 | 40 | 250 | -20 | 200 | Encoders, stepper motors, servo drives, light instrument drives |
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