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 594 configurations (QFS-5S-PB, QFS-5S-5/8, QFS-5S-3/4, QFS-5S-7/8, QFS-5S-15/16 and 589 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