The ICP 1057877 specifically requires a 5/8-inch motor shaft

B12825167S

Its robust construction and precise snap-action response make it the industry standard for maintaining optimal airflow safety and system uptime in demanding commercial environments

Smith F48A11A27 or Marathon WE048A11O1590 cross-references

with a programmable offset to maintain calibration accuracy

Heil Quaker ICP 703494 Blower Wheel 322056-301 The ICP 1057877 specifically requiresThe Heil Quaker ICP 703494 Blower Wheel is a critical replacement component engineered for high static performance in residential and light commercial HVAC systems. This 9x8x1 2 CCW CV blower wheel features a 9 inch diameter and 8 inch width, specifically designed with a 1 2 inch bore for precise integration with ICP furnace blower motors. As a counter clockwise (CCW) rotation part with a concave (CV) hub position, it ensures optimal airflow velocity