PartPilot • Catalogue
Units:
Pulleys
Choose belt profile first
Search by PCD (preferred) or OD
Customers often measure OD. We convert using OD ≈ PCD + offset.
Offsets: A=7, B=9, C=12, SPZ=8, SPA=10, SPB=13, SPC=16.
Measurement Guidance
PCD is the standard reference. If you only have OD, we estimate PCD by subtracting the profile offset.
Diagram (PCD vs OD):
• PCD: Pitch circle diameter (belt centerline)
• OD: Outside diameter (rim)
• OD: Outside diameter (rim)
Tip: When in doubt, enter the size you measured and check Exact/Smaller/Larger.
Ratio Helper (Driven / Driver)
Target ratio is defined as D₂/D₁ using PCD. Profile is taken from the selector above.
Copies a clean prompt with your current selections.
Learn by doing, earn by applying.