How do I calculate V-Belt & Timing Belt Drive?

To calculate V-Belt & Timing Belt Drive: Enter Drive pulley diameter, Driven pulley diameter, Drive speed and other values. Click Calculate. INDUGRID computes the result instantly using the formula: i = d₂/d₁ = n₁/n₂ | v_belt = π × d₁ × n₁ / 60,000 [m/s]. No registration required.

What units does the V-Belt & Timing Belt Drive calculator use?

The V-Belt & Timing Belt Drive calculator uses the following units: mm, rpm. SI units are used by default.

Is the V-Belt & Timing Belt Drive calculator free?

Yes. The INDUGRID V-Belt & Timing Belt Drive calculator is completely free, requires no account or login, and works on desktop and mobile browsers.

Mechanical Engineering

V-Belt & Timing Belt Drive

Calculate pulley speeds, belt velocity, transmission ratio and centre distance for belt drive systems.

Units:

in LinkedIn

💡Optimal belt velocity: 10–25 m/s for V-belts. Above 30 m/s centrifugal forces dominate, below 5 m/s efficiency drops. For synchronous drives (timing belts) maximum velocity is typically 40–80 m/s. Minimum pulley wrap angle: 120° on small pulley.

i = d₂/d₁ = n₁/n₂ | v_belt = π × d₁ × n₁ / 60,000 [m/s]

Input

Drive pulley diameter iPitch diameter of the drive (motor) pulley in mm.

Driven pulley diameter iPitch diameter of the driven (load) pulley in mm.

Drive speed iRotational speed of the drive shaft in rpm.

rpm

Centre distance iDistance between shaft centres in mm.

Result

Transmission ratio i —

Driven speed [rpm] —

Belt velocity [m/s] —

Approximate belt length [mm] —

Wrap angle (small pulley) [°] —

Belt velocity rating —