Stober 1 Servo Gear Units

Overview
PK Performance Overview
PK Series performance is dependent on several factors including duty cycle, bearing design, gearhead size and stage configuration, among
others. Use the chart below for preliminary evaluation, then use the following performance chart and selection information on the following
pages for specific performance sizing and selection.
Size/Generation/# of Stages P521 P721 P821 P921
Secondary Unit K1 K1 K2 K2 K3 K4
Acceleration Torque M 2BMAX Nm 300 650 700 1400 1600 2700
Output Torque Nom. 1) M 2N Nm 210 440 440 1000 1000 2000
Torsional Stiffness C 2 Nm/arcmin 26 46 45 64 108 247
Torsional Backlash 2) Δφ arcmin ≤5 ≤4 ≤4.5 ≤3.5 ≤4.5 ≤3.5
Input Speed Max. n 1MAX
Continuous
Cyclic
4000
6000
Efficiency (@nom torque) % 94 94 94 94 94 94
Weight
kg
lbs
22.4
49
4000
6000
Noise 3) dB(A) ≤63 ≤63 ≤64 ≤64 ≤65 ≤66
Performance by Bearing Design Option 4)
26.5
59
4000
5500
37
82
4000
5500
50
110
3500
5000
55
121
(R = Ball bearing D = Double row angular contact bearing Z = Cylindrical roller bearing)
3500
5000
Size/Secondary Unit P5_K1 P7_K1 P7_K2 P8_K2 P8_K3 P9_K4
Axial Load Max.
F 2AMAX
D N 3500 4500 4500 7500 7500 10,000
R N 2300 2900 2900 4700 4700 6000
Z N 1600 2000 2000 3600 3600 5000
F 2RMAX D N 7000 9000 9000 15,000 15,000 20,000
Radial Load Max.
R N 6500 8000 8000 13,000 13,000 18,000
Z N 8000 10,000 10,000 18,000 18,000 27,000
Tilting Moment Max.
M 2KMAX
D Nm 406 648 648 1140 1140 2070
R Nm 338 536 536 897 897 1665
Z Nm 416 670 670 1242 1242 2500
1)
Ratings based on input speed (n 1
) of 1500 RPM.
For torque at higher input speeds (M 2NX
) solve the formula:
where n 1
= Actual Input Speed.
2)
Tested at 1.5% of nominal torque and recorded on the output side of the gearhead. For lower backlash, contact STOBER technical support.
M2NX =
M 2N
3
n 1
1500
96.4
213
PKX/PK Series: RIGHT ANGLE – Shaft Output
3)
Measurement at one (1) meter distance with input speed (n 1
) of 1500 RPM.
4)
See page 221 for output bearing options. Rating based on output speed (n 2
) of 100 RPM. For values at other speeds see page 220.
800.711.3588 • www.stober.com Servo Gear Units V.28 217