Convert Ounce-force inches to Gram-force millimetres
Convert Ounce-force inches (ozf·in) to Gram-force millimetres (gf·mm) instantly and accurately.
Conversion Formula
gf·mm = ozf·in × 720.0778874
About Ounce-force inches
The ounce-force inch (ozf·in) equals ≈ 7.062 × 10⁻³ N·m, the traditional US unit for small instrument and servo motors. Brushless DC motors for drones, precision positioning stages, and US industrial servo catalogs (Maxon, Pittman) specify stall torque in ozf·in. A typical NEMA 17 stepper motor delivers 80-220 ozf·in. 16 ozf·in = 1 lbf·in. 1 ozf·in ≈ 7.062 × 10⁻³ N·m ≈ 72.0 gf·cm.
About Gram-force millimetres
The gram-force millimetre (gf·mm) equals 9.80665 × 10⁻⁶ N·m, the natural unit for precision micro-mechanisms. Swiss watchmaking datasheets list hairspring and balance-wheel detent torques in gf·mm; micro-servo holding torques, precision force gauge spring calibration, and miniature dental handpiece torque limits also fall in this range. A typical watch hairspring torque is 0.1-5 gf·mm. 1 gf·mm = 9.80665 × 10⁻⁶ N·m = 100 dyn·cm = 0.1 gf·cm.
Quick Reference Table
| Ounce-force inches (ozf·in) | Gram-force millimetres (gf·mm) |
|---|---|
| 1 ozf·in | 720.078 gf·mm |
| 2 ozf·in | 1440.16 gf·mm |
| 5 ozf·in | 3600.39 gf·mm |
| 10 ozf·in | 7200.78 gf·mm |
| 25 ozf·in | 18001.9 gf·mm |
| 50 ozf·in | 36003.9 gf·mm |
| 100 ozf·in | 72007.8 gf·mm |