Crown Engineering 10010 Coupler 321894-709 This collar is specifically intended

This collar is specifically intended for 1/2" round or 3/8" square shaft adapters

Designed with the contractor in mind

ensuring safety and efficiency in combustion safety systems and furnace diagnostic assemblies

This model features a 32-foot pitch and utilizes a ball bearing motor design

Crown Engineering 10010 Coupler 321894-709 This collar is specifically intendedThe Crown Engineering 10010 Coupler is a professional grade Spiralink pump coupler designed for high torque hydronic heating systems. Specifically engineered for 1 12 to 1 3 HP motors, it features a unique single spring spiral design that provides 3 dimensional flexibility to compensate for shaft misalignment between the motor and the pump head. Unlike older, multi part "fly away" couplings, this one piece HVAC pump coupling eliminates friction