Gear Center Distance Calculator
Shaft spacing for a meshing gear pair (and the ratio it gives).
Boring the housing IS setting this number — get it right before cutting gears, since backlash and contact pattern both hang off it. Profile-shifted gears can rescue a wrong bore, within limits.
Formula
Gear Center Distance Calculator is a free gear center distance for mechanical and machine-design engineers — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Gear Center Distance Calculator
Shaft spacing for a meshing gear pair (and the ratio it gives). The calculation implements a = m(z₁+z₂)/2 (Gear geometry — IS 4460). Boring the housing IS setting this number — get it right before cutting gears, since backlash and contact pattern both hang off it. Profile-shifted gears can rescue a wrong bore, within limits.
How to use Gear Center Distance Calculator
- 1Enter Module in mm.
- 2Enter Pinion teeth.
- 3Enter Gear teeth.
- 4Read Centre distance, Ratio instantly — no submit button needed.
- 5Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Gear Center Distance Calculator?
- ✓Implements the standard formula — a = m(z₁+z₂)/2
- ✓Reference cited on-page: Gear geometry — IS 4460
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Live worked example: the substitution recomputes from your numbers
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Gear Center Distance Calculator use?+
It computes a = m(z₁+z₂)/2, per Gear geometry — IS 4460. The formula is displayed under the result along with a worked example substituted with your own inputs.
What should I keep in mind when using this calculator?+
Boring the housing IS setting this number — get it right before cutting gears, since backlash and contact pattern both hang off it. Profile-shifted gears can rescue a wrong bore, within limits.
Is this suitable for machine design coursework?+
Yes — these are the exact Shigley/Machinery's-Handbook formulas, with the substitution shown step by step, so you can follow the worked example into your own calculation sheet.
Is the Gear Center Distance Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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