Convert Gram-force millimetres to Pound-force inches
Convert Gram-force millimetres (gf·mm) to Pound-force inches (lbf·in) instantly and accurately.
Conversion Formula
lbf·in = gf·mm × 8.679616621e-5
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 Pound-force inches
The pound-force inch (lbf·in) equals ≈ 0.11299 N·m, the dominant US customary unit for motor and machinery documentation. Rockwell Automation, Parker Hannifin, and Allied Motion servo catalogs express stall and rated torques in lbf·in; US machine-tool spindles and conveyor drive gearboxes are also specified in lbf·in. Typical fractional-horsepower motor torques: 5-200 lbf·in. 1 lbf·in ≈ 0.11299 N·m = 16 ozf·in = 1/12 lbf·ft.
Quick Reference Table
| Gram-force millimetres (gf·mm) | Pound-force inches (lbf·in) |
|---|---|
| 1 gf·mm | 8.68 × 10-5 lbf·in |
| 2 gf·mm | 0.000173592 lbf·in |
| 5 gf·mm | 0.000433981 lbf·in |
| 10 gf·mm | 0.000867962 lbf·in |
| 25 gf·mm | 0.0021699 lbf·in |
| 50 gf·mm | 0.00433981 lbf·in |
| 100 gf·mm | 0.00867962 lbf·in |