Standard Models and Specifications
Chapter 2
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.
Model
Rated
rotation
Rated
torque
Ratio
Maximum
momentary
Maximum
momentary
Reduction
gear inertia
Allowable
radial torque
Allowable
thrust torque
speed
rotation speed
torque
r/min
N ? m
%
r/min
N ? m
kg ? m 2
N
N
4.13 × 10
3.53 × 10
50 W
1/5
1/9
R7G-VRSFPB05B50
R7G-VRSFPB09B50
600
333
0.517
0.93
65
65
900
500
1.56
2.81
–6
–6
392
441
196
220
1/15 R7G-VRSFPB15B50
200
1.67
70
300
5.04
3.67 ×
10 –6
588
294
3.59 × 10
1/25 R7G-VRSFPB25B50
120
2.78
70
180
8.40
–6
686
343
100 W 1/5
1/9
R7G-VRSFPB05B100
R7G-VRSFPB09B100
600
333
1.19
2.29
75
80
900
500
3.60
6.91
4.08 ×
3.43 ×
10 –6
10 –6
392
441
196
220
3.92 × 10
1/15 R7G-VRSFPB15B100
1/25 R7G-VRSFPB25C100
200
120
3.82
6.36
80
80
300
180
11.5
19.2
3.62 × 10 –6
–6
588
1323
294
661
1.53 × 10
200 W 1/5
1/9
R7G-VRSFPB05B200
R7G-VRSFPB09C400
600
333
2.71
3.78
85
66
900
500
8.12
11.3
–5
2.68 × 10 –5
392
931
196
465
1/15 R7G-VRSFPB15C400
1/25 R7G-VRSFPB25C200
200
120
6.31
11.1
66
70
300
180
18.9
33.4
2.71 ×
2.67 ×
10 –5
10 –5
1176
1323
588
661
2.68 × 10
400 W 1/5
1/9
R7G-VRSFPB05C400
R7G-VRSFPB09C400
600
333
5.40
9.49
85
83
900
500
16.2
28.5
3.22 × 10 –5
–5
784
931
392
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
7.17 × 10
750 W 1/5
R7G-VRSFPB05C750
600
10.8
90
900
32.0
–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
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.
2-39
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