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Belt speed from the pulley

The nominal belt speed from the drive pulley diameter and its rotation speed. Local calculation with an explicit formula.

Effective diameter per pulley documentation or measurement.

The rotation speed of the pulley itself.

Enter the diameter and speed — the result will appear here.

Formula

v = π · D_eff · n, where D_eff is in metres and n in revolutions per second; the result v is in metres per second.

  • D_eff — drive pulley effective diameter, mm → m
  • n — pulley speed, rpm → rps
  • v — belt speed, m/s and m/min

Input is in millimetres and rpm; the formula uses metres and revolutions per second — conversion is automatic.

Example

D = 500 mm, n = 120 rpm → v = π · 0.5 · 2 ≈ 3.14 m/s ≈ 188 m/min.

Limits

  • The estimate is nominal: it ignores belt thickness changes, slip and lagging wear.
  • The result serves as orientation for the contact tools, not as a setting for the drive.
  • For a loaded conveyor the actual speed may differ; measurement or documentation has priority.
Caveat:Kinematics with an explicit formula, without technological conclusions about cleaning regimes.