Product Description
Martin - Jaw Coupling Spider
Martin Sprocket & Gear — 44 Configurations
Martin couplings connect rotating shafts while accommodating misalignment, absorbing shock loads, and dampening vibration between the driver and driven equipment. Whether you’re connecting a motor to a pump, gearbox to a conveyor, or any other power transmission application, the right coupling protects both components from the forces that cause premature bearing failure, shaft fatigue, and seal leaks.
Martin Sprocket & Gear has been manufacturing couplings and power transmission components in the USA since 1928. Their coupling line includes jaw couplings, Quadra-Flex® elastomeric couplings, and gear couplings — each designed for specific torque ranges, misalignment tolerances, and operating conditions.
Available in 44 configurations (SPD-NA1, SPD-BUN-035, SPD-NA2, SPD-NA3, SPD-BRO-050 and 39 more) for professional power transmission applications.
- Misalignment Accommodation — handles angular, parallel, and axial shaft misalignment
- Shock Absorption — elastomeric elements dampen vibration and protect connected equipment
- Easy Maintenance — replace flex elements without moving motors or driven equipment
- Multiple Bore Options — available in standard and metric bore sizes with keyways
- USA Heritage — Martin Sprocket & Gear, manufacturing since 1928
| SKU | Material | Weight |
|---|---|---|
| Size 035 | ||
| SPD-BUN-035 | Buna-N | 0.0 lbs |
| Size 050 | ||
| SPD-BRO-050 | Bronze | 0.1 lbs |
| SPD-BUN-050 | Buna-N | 0.2 lbs |
| SPD-HYT-050 | Hytrel | 0.0 lbs |
| SPD-URE-050 | Urethane | 0.0 lbs |
| Size 070 | ||
| SPD-BRO-070 | Bronze | 0.4 lbs |
| SPD-BUN-070 | Buna-N | 0.0 lbs |
| SPD-HYT-070 | Hytrel | 0.0 lbs |
| SPD-URE-070 | Urethane | 0.0 lbs |
| Size 075 | ||
| SPD-BRO-075 | Bronze | 0.1 lbs |
| SPD-BUN-075 | Buna-N | 0.0 lbs |
| SPD-HYT-075 | Hytrel | 0.0 lbs |
| SPD-URE-075 | Urethane | 0.0 lbs |
| Size 090/095 | ||
| SPD-BRO-090/095 | Bronze | 0.2 lbs |
| SPD-BUN-090/095 | Buna-N | 0.1 lbs |
| SPD-HYT-090/095 | Hytrel | 0.0 lbs |
| SPD-URE-090/095 | Urethane | 0.0 lbs |
| Size 099/100 | ||
| SPD-BRO-099/100 | Bronze | 0.4 lbs |
| SPD-BUN-099/100 | Buna-N | 0.1 lbs |
| SPD-HYT-099/100 | Hytrel | 0.1 lbs |
| SPD-URE-099/100 | Urethane | 0.1 lbs |
| Size 110 | ||
| SPD-BRO-110 | Bronze | 0.7 lbs |
| SPD-BUN-110 | Buna-N | 0.2 lbs |
| SPD-HYT-110 | Hytrel | 0.1 lbs |
| SPD-URE-110 | Urethane | 0.1 lbs |
| Size 150 | ||
| SPD-BRO-150 | Bronze | 1.1 lbs |
| SPD-BUN-150 | Buna-N | 0.3 lbs |
| SPD-HYT-150 | Hytrel | 0.2 lbs |
| SPD-URE-150 | Urethane | 0.2 lbs |
| Size 190 | ||
| SPD-BRO-190 | Bronze | 1.4 lbs |
| SPD-BUN-190 | Buna-N | 0.3 lbs |
| SPD-HYT-190 | Hytrel | 0.3 lbs |
| SPD-URE-190 | Urethane | 0.3 lbs |
| Size 225 | ||
| SPD-BRO-225 | Bronze | 1.7 lbs |
| SPD-BUN-225 | Buna-N | 0.4 lbs |
| SPD-HYT-225 | Hytrel | 0.3 lbs |
| SPD-URE-225 | Urethane | 0.3 lbs |
| Size 276 | ||
| SPD-BRO-276 | Bronze | 5.0 lbs |
Where Martin Couplings Connect the Drive
- Pump Systems — motor-to-pump connections on centrifugal, positive displacement, and submersible pump drives
- Conveyor Systems — motor-to-gearbox and gearbox-to-head-shaft connections on belt and roller conveyors
- Agricultural Equipment — irrigation pumps, grain handling drives, and PTO-to-implement connections
- HVAC Systems — fan drives, chiller compressors, and cooling tower motors
- General Industrial — mixers, agitators, generators, and any motor-to-load connection requiring misalignment accommodation
1 All dimensions follow the Lambear tri-format: Imperial fraction – Decimal inches – Metric (mm).
2 Specifications are catalog values. Contact us for application-specific recommendations.
