F Series Performance Overview
Gearhead Size Nominal Output Torque
Nm
Torsional Backlash¹
arcmin
Input Speed Max. (Cyclic)
rpm
Axial Load Max. Solid Shaft
N
Axial Load Max. Hollow Bore
N
Torsional Stiffness
arcmin
Stage 2 3 2 3 2 3 2 3 2 3 2 3
F1 120³ ≤11³ 6000³ 1100³ 900³ 7.7³
F2 240 ≤11 6000 1400 1200 ≤17.9
F3 400 ≤11 6000 1900 1350 ≤21.8
F4 700 ≤10 5000 5500 2350 1900 ≤38.6 ≤38.7
F6 1100 ≤10 5000 3100 2200 ≤77.1 ≤77.3
Notes
1)  Tested at 1.5% of nominal torque and recorded on the output side of the gearhead. For lower backlash, contact STOBER technical support.
2)  Rating based on output speed (n2) of 20 RPM.
3)  Two stage