Coupling Specs: grid
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| grid | large | Handles continuous shock loads; large torque capacity; rugged | 10 | 3.5 | medium | Heavier than disc couplings; maintenance needed; not for precision applications | yes | 0.33 | 0.125 | 0.018 | 3,200 | 80,000 | 200 | -30 | 300,000 | Rock crushers, rolling mills, kilns, large fans and pumps >1000 HP |
| grid | medium | Excellent shock load absorption; compact size; proven in mining/industry | 5.5 | 1.75 | medium | Lubrication required; cover seal needed to retain grease; backlash | yes | 0.33 | 0.094 | 0.012 | 4,500 | 8,000 | 200 | -30 | 40,000 | Industrial conveyors, pumps, crushers, agitators up to 500 HP |
| grid | small | Shock and vibration absorption; compact; more damping than disc or gear | 2.5 | 0.75 | medium | Requires periodic lubrication; cover removal for inspection; moderate backlash | yes | 0.33 | 0.062 | 0.008 | 7,200 | 700 | 200 | -30 | 6,000 | Pumps, fans, conveyors, light industrial drives up to 75 HP |
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