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ToolsPulley Speed Calculator

Belt / Pulley Speed Ratio Calculator

Size mechanical belt-and-pulley or chain-sprocket systems by calculating speed ratios and belt linear velocity.

Purpose & Calculation Breakdown (India)

Purpose of this Tool: Size mechanical belt-drive pulleys to configure motor speeds to machine speed specifications.

• Speed Ratio:Ratio = \frac{D_2}{D_1} = \frac{RPM_1}{RPM_2}
• Belt speed:V_{belt(m/s)} = \pi \times D_{1(m)} \times \frac{RPM_1}{60}
mm
50600
mm
501200
RPM
1003600

Pulley System Output

Pulley Ratio2.00 : 1
Speed Ratio
Driven Output Speed720.0 RPM
Output RPM
Belt Linear Velocity11.31 m/s
Belt Speed

Generates a formal executive feasibility proposal page ready for management sign-off & signatures.

Suggested Next Step

Ready to source VFD drives or gear motors? Browse verified OEM dealers in the Marketplace.