Gear Pitch Line Velocity Calculator

Inputs

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Choose whether to enter pitch diameter directly or derive it from tooth size and count.
Operating pitch diameter of the gear.
mm
Rotational speed of the checked gear.
rpm
Optional running torque used only for transmitted power. Leave at 0 when unknown.
N·m

Results

Default result
Edit inputs
Pitch-line velocity(v)
5.0265m/s
Pass

Low to moderate pitch-line speed for a first-pass geometry screen.

v = pi*d*n/60.

Also computed

Pitch-line speed per minute(V)301.59m/min

Pitch diameter used(d)80mm

Pitch circumference(pi*d)251.33mm

Revolutions per second(n/60)20rev/s

Transmitted power(P)Pass12.566kW

Power from entered running torque and RPM.

Applied torque used(T)100N·m

Method notes 3 notes
  • Pitch-line velocity uses the operating pitch diameter: v = pi x d x n / 60 with d in metres and n in rpm.
  • When module, diametral pitch or circular pitch is entered, pitch diameter is derived from d = m*z, m = 25.4/DP or d = z*p_c/pi.
  • This is a speed and power screen only. It does not rate tooth bending, pitting, lubrication, dynamic factor, balance, noise or bearing reactions.

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