Chapter 2
2-39
Standard Models and Specifications
2-5 Reduction Gear Specifications
■ Reduction Gears for SMARTSTEP A-series Servomotors (R7G-@)
There are two kinds of reduction gears for SMARTSTEP A-series Servomotors:
• Reduction gears for 3,000-r/min Cylinder-style Servomotors
(Backlash 3
′ max. and backlash 45′ max.)
• Reduction gears for 3,000-r/min Flat-style Servomotors
(Backlash 3
′ max. and backlash 45′ max.)
There are four reduction ratios: 1/5, 1/9, 1/15, and 1/25. Select a reduction ratio to match the ca-
pacity of the Servomotor.
Note There are no 30-W reduction gears for Cylinder-style Servomotors.
■ Reduction Gears for Cylinder-style Servomotors
● Backlash = 3′ Max.
Note 1. The reduction gear inertia indicates the Servomotor shaft conversion value.
Note 2. The enclosure rating for Servomotors with reduction gears is IP44.
Note 3. The allowable radial torque is the value for the center of the shaft.
Model Rated
rotation
speed
Rated
torque
Ratio Maximum
momentary
rotation speed
Maximum
momentary
torque
Reduction
gear inertia
Allowable
radial torque
Allowable
thrust torque
r/min N
⋅m% r/min N⋅m
kg
⋅m
2
NN
50 W 1/5 R7G-VRSFPB05B50 600 0.517 65 900 1.56
4.13
× 10
–6
392 196
1/9 R7G-VRSFPB09B50 333 0.93 65 500 2.81
3.53
× 10
–6
441 220
1/15 R7G-VRSFPB15B50 200 1.67 70 300 5.04
3.67
× 10
–6
588 294
1/25 R7G-VRSFPB25B50 120 2.78 70 180 8.40
3.59
× 10
–6
686 343
100 W 1/5 R7G-VRSFPB05B100 600 1.19 75 900 3.60
4.08
× 10
–6
392 196
1/9 R7G-VRSFPB09B100 333 2.29 80 500 6.91
3.43
× 10
–6
441 220
1/15 R7G-VRSFPB15B100 200 3.82 80 300 11.5
3.62
× 10
–6
588 294
1/25 R7G-VRSFPB25C100 120 6.36 80 180 19.2
3.92
× 10
–6
1323 661
200 W 1/5 R7G-VRSFPB05B200 600 2.71 85 900 8.12
1.53
× 10
–5
392 196
1/9 R7G-VRSFPB09C400 333 3.78 66 500 11.3
2.68
× 10
–5
931 465
1/15 R7G-VRSFPB15C400 200 6.31 66 300 18.9
2.71
× 10
–5
1176 588
1/25 R7G-VRSFPB25C200 120 11.1 70 180 33.4
2.67
× 10
–5
1323 661
400 W 1/5 R7G-VRSFPB05C400 600 5.40 85 900 16.2
3.22
× 10
–5
784 392
1/9 R7G-VRSFPB09C400 333 9.49 83 500 28.5
2.68
× 10
–5
931 465
1/15 R7G-VRSFPB15C400 200 15.8 83 300 47.6
2.71
× 10
–5
1176 588
1/25 R7G-VRSFPB25D400 120 26.4 83 180 79.3
2.79
× 10
–5
1617 808
750 W 1/5 R7G-VRSFPB05C750 600 10.8 90 900 32.0
7.17
× 10
–5
784 392
1/9 R7G-VRSFPB09D750 333 18.3 85 500 54.3
6.50
× 10
–5
1176 588
1/15 R7G-VRSFPB15D750 200 30.5 85 300 90.5
7.09
× 10
–5
1372 686
1/25 R7G-VRSFPB25E750 120 50.8 85 180 151
7.05
× 10
–5
2058 1029