Convert Gram-force millimetres to Ounce-force inches
Convert Gram-force millimetres (gf·mm) to Ounce-force inches (ozf·in) instantly and accurately.
Conversion Formula
ozf·in = gf·mm × 0.001388738659
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.
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.
Quick Reference Table
| Gram-force millimetres (gf·mm) | Ounce-force inches (ozf·in) |
|---|---|
| 1 gf·mm | 0.00138874 ozf·in |
| 2 gf·mm | 0.00277748 ozf·in |
| 5 gf·mm | 0.00694369 ozf·in |
| 10 gf·mm | 0.0138874 ozf·in |
| 25 gf·mm | 0.0347185 ozf·in |
| 50 gf·mm | 0.0694369 ozf·in |
| 100 gf·mm | 0.138874 ozf·in |