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Spur Gear Ratio & Center Distance Calculator

Ratio & Center Distance

For spur gears. Enter a ratio and a center distance to list the tooth counts and pitches that fit.

Gear specs

Example: enter 5 for 12:60, or .2 for 60:12
Distance between the shaft centers (the two pitch diameters added together, divided by 2)
Pitches
CD units
Pitch type

Results

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