Coupling Specs: rigid_flange
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| rigid_flange | large | No backlash; no wear; suitable for all environmental conditions | 14 | 3 | none | Zero misalignment tolerance; installation requires precision bore and shaft alignment | yes | 0 | 0.015 | 0 | 3,000 | 50,000 | 500 | -65 | 999,999 | Steam/gas turbines, large compressors, synchronous motor drives |
| rigid_flange | medium | Simple; inexpensive; no wear parts; highest reliability in aligned systems | 6 | 1.5 | none | No misalignment tolerance; shaft alignment mandatory; transmits all vibration | yes | 0 | 0.01 | 0 | 4,500 | 5,000 | 500 | -65 | 999,999 | Heavy machinery, turbines, pumps requiring rigid connection, diesel engine shafts |
| rigid_flange | small | Zero flexibility; highest torque capacity per size; no maintenance | 2.5 | 0.5 | none | Requires extremely precise shaft alignment; any misalignment causes high bearing loads | yes | 0 | 0.01 | 0 | 8,000 | 500 | 500 | -65 | 999,999 | Turbine-generator sets requiring zero compliance, pump shafts on rigid bases |
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