PKX Series Performance
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
P221_KX3 16 ≤7 - 8.5 6000 R:500;  D: -- ;  Z: --  R:1200;  D: -- ;  Z: --  1.9
P222_KX3 6000
P321_KX3 45 ≤5 - 7.5 6000 R:1000;  D:1400;  Z:600 R:2500;  D:2750;  Z:3000 5
P322_KX3 6000
P421_KX4 85 ≤5 - 7.5 4500 R:1500;  D:2250;  Z:1000 R:4000;  D:4500;  Z:5000 11
P422_KX3 6000
P521_KX5 210 ≤4 - 6.5 4000 R:2300;  D:3500;  Z:1600 R:6500;  D:7000;  Z:8000 33
P522_KX4 4500
P721_KX7 440 ≤4 - 6.5 3500 R:2900;  D:4500;  Z:2000 R:8000;  D:9000;  Z:10,000 55
P722_KX5 4000
P821_KX8 1000 ≤4 - 6.5 3000 R:4700;  D:7500;  Z:3600 R:13,000;  D:15,000;  Z:18,000 176
P822_KX7 3500
P922_KX8 2000 ≤4 - 6.5 3000 R:6000;  D:10,000;  Z:5000 R:18,000;  D:20,000;  Z:27,000 340
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.
Output Bearing Options

bearings
Output Shaft Load

radial axial