Pulley Groove Profiles: SPA, SPB, SPC vs Classical - How to Match

Match pulley groove profiles to classical and wedge V-belt sections so you avoid slip, belt wear, and incorrect replacement geometry.

4 min readPublished for UAE procurement

A pulley can have the right outside diameter and bore but still fail if its groove does not match the installed belt section.

Installed belt family	Pulley groove family	Verify
A, B, C classical	Classical	Top width and groove angle
SPZ, SPA, SPB, SPC	Wedge	Section and pitch geometry

Confirm the installed belt profile, shaft fit, operating speed, and application duty before approving a replacement.

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