PulleyRpm · mechanical
PulleyRpm pulley speed ratio
Predict shaft speed after a belt or friction pulley ratio change
TECHNICAL UTILITY · PULLEY_SPEED_RATIO
Result
ratio=D_driver/D_driven; N_driven=N_driver×ratio (no slip)
How to use this estimate
Ideal no-slip pulley speed ratio N2=N1·(D1/D2); assumes comparable diameter basis and zero slip. Units: RPM × (in/in) → RPM. Out of scope as listed on this page. Screening / idealized model only — not a stamped design.
Sources, methodology, and assumptions
Methodology
Ideal no-slip pulley speed ratio N2=N1·(D1/D2); assumes comparable diameter basis and zero slip
Units check
RPM × (in/in) → RPM
Assumptions
Idealized/derived model as scoped; user-supplied inputs.
Out of scope
See MODEL_VALIDITY outOfScope; not a stamped design.
Sources
Unit-context references only — exact model supported by derivation, not org homepages.
Last technically reviewed: 2026-09-11