Coupling Specs: disc_diaphragm
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| disc_diaphragm | extra_large | Highest precision at large torque; API 671 qualified; no lubrication | 14 | 4 | none | Cost; strict alignment; no damping; requires precision machining | no | 0.5 | 0.125 | 0.02 | 3,600 | 50,000 | 400 | -65 | 2,000,000 | Large turbomachinery, power generation drives, compressor trains >10000 HP |
| disc_diaphragm | large | High-speed capable; no backlash; long maintenance-free life; clean | 8 | 2 | none | Strict alignment requirement; cost; limited misalignment accommodation | no | 0.5 | 0.1 | 0.015 | 5,000 | 15,000 | 400 | -65 | 500,000 | Large turbine-generator sets, API pump drives, power generation up to 5000 HP |
| disc_diaphragm | medium | No lubrication; fail-safe; high-cycle fatigue resistant; clean operation | 3.5 | 0.75 | none | No damping; high lateral stiffness requires precise alignment; cost | no | 0.5 | 0.075 | 0.01 | 8,000 | 1,500 | 400 | -65 | 80,000 | Centrifugal pumps, compressors, turbines, process industry drives |
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