K Series Performance Overview
Gearhead Size Nominal Output Torque
Nm
Torsional Backlash¹
arcmin
Input Speed Max. (Cyclic)
rpm
Axial Load Max.
N
Radial Load Max.²
N
Torsional Stiffness
arcmin
Stage 2 3 2 3 2 3 2 3 2 3 2 3
K1 119³ ≤12³ 6000³ 1900³ 5000³ ≤5.8³
K2 200 ≤10 5500 2100 6000 ≤8.1
K3 350 ≤10 4200 5000 2400 7000 ≤9.6 ≤9.7
K4 550 ≤10 5000 3500 11,200 ≤19.7 ≤19.9
Stage 3 4 3 4 3 4 3 4 3 4 3 4
K5 900 ≤10 4500 3500 13,450 ≤30.4 ≤30.5
K6 1450 ≤10 4000 4000 16,000 ≤44.9 ≤45.1
K7 2400 ≤10 3800 5500 22,000 ≤80.9 ≤81.1
K8 4200 ≤10 3600 7250 29,000 ≤140.9 ≤141.3
K9 7000 ≤10 3400 16,500 65,000 ≤2029.6 ≤210
K10 11,893 12,000 ≤10 3000 3200 25,000 80,000 ≤461.7 ≤464.5
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

Output Shaft Load

radial axial