Question 1

What does the Gear Ratio calculator do?

Accepted Answer

Output speed and torque for a single-stage gear pair. Ratio i = N₂/N₁. Output speed n₂ = n₁/i. Output torque T₂ = T₁·i·η.

Question 2

How accurate is the result?

Accepted Answer

The calculator implements the published formula. Real-world results depend on operating conditions — temperature, lubrication, mounting, and duty cycle. Use the output as a starting point and confirm with your OEM datasheet.

Question 3

Can Tunnel Fox help me source the part?

Accepted Answer

Yes. Send the calculated specification or your OEM number through the quote form on this page and we'll respond within 1 business day with OEM and equivalent options.

Gear Ratio & Output Speed

Source the part you just sized.