The reversible rotation feature and dual mounting options—including shell-band and thru-bolt configurations—ensure seamless installation in tight blower housings

Can I repair individual wires instead of replacing the entire harness

the unit prevents rapid cycling and nuisance tripping caused by surface turbulence or splashing

4 inches allows technicians to fine-tune belt-driven fan speeds

System Protection: Prevents unnecessary auxiliary heat cycling

Carrier KR51BF415 Motor Pulley 321894-709 The reversible rotation feature andThe Carrier KR51BF415 Motor Pulley is a precision engineered fixed bore drive component designed for specific Carrier, Bryant, and Payne air handling units and rooftop systems. Featuring a 7 8 inch bore and a 4. 15 inch outside diameter, this Type A belt pulley (also compatible with AX section belts) provides a consistent 1: 1 or reduced drive ratio to maintain precise blower wheel RPMs. Constructed from high grade cast iron, it offers superior