Coupling Specs: bellows
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| bellows | extra_large | Zero backlash; precision positioning; clean-room compatible | 3 | 1 | none | Low torque; not for shock loads; fatigue at overmisalignment | no | 3 | 0.1 | 0.015 | 5,000 | 300 | 300 | -65 | 15,000 | Precision servo, semiconductor equipment, coordinate measuring machines |
| bellows | medium | Constant velocity; maintenance-free; vacuum-compatible variants available | 1.5 | 0.375 | none | Limited torque; resonance susceptibility; cost; not for heavy-duty industrial use | no | 3 | 0.062 | 0.01 | 8,000 | 80 | 300 | -65 | 4,000 | CNC machine tools, robotics, servo systems, precision indexing |
| bellows | small | Zero backlash; high torsional stiffness; wide temp range; handles large angular misalignment | 0.875 | 0.125 | none | Very low torque capacity; not for shock loads; fatigue sensitive to over-misalignment | no | 3 | 0.05 | 0.01 | 10,000 | 20 | 300 | -65 | 800 | Precision servo systems, optical encoders, stepper motors, motion control |
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