The 36783750 Ingersoll Rand OEM Coupler is an original equipment drive coupling designed for Ingersoll Rand DM-series rotary drilling rigs including the DM-45, DM-50, and DM-L. This coupling is built to handle the demanding torque transmission requirements of blasthole drilling in mining and aggregate operations.
IR rotary drill rigs, including models in the DM series, rely on properly matched drive couplers to maintain safe, productive drilling operations. The coupler absorbs driveline shock loads that occur when the drill bit engages varying rock formations, protecting the engine, gearbox, and rotary head from damaging torsional spikes. Coupler condition directly affects drilling performance, vibration levels, and component life throughout the rig’s power train.
Part number 36783750 matches the original equipment dimensions, mounting pattern, and material specification. During replacement, pay close attention to hub alignment – drilling rig tolerances are tight, and misalignment will accelerate wear on the new coupling. Replace all associated fasteners if they show signs of fatigue or elongation.
Available from Stark Industrial Products with same-day shipping on in-stock units.











