NEMA 17 Planetary Gear Head
Ratio Stage Efficiency % Inertia Reflected Back to Motor Pinion (oz-in-sec^2)
3:1 Single 90 0.000171
4:1 Single 90 0.000123
5.5:1 Single 90 0.0000767
7:1 Single 90 0.0000513
10:1 Single 90 0.0000272
16:1 Double 85 0.000117
22:1 Double 85 0.000113
28:1 Double 85 0.000111
40:1 Double 85 0.0000245
49:1 Double 85 0.0000448
55:1 Double 85 0.0000238
70:1 Double 85 0.0000235
100:1 Double 85 0.0000233
NEMA 23 Planetary Gear Head
Ratio Stage Efficiency % Inertia Reflected Back to Motor Pinion (oz-in-sec^2)
3:1 Single 90 0.00053
4:1 Single 90 0.00035
5.5:1 Single 90 0.000212
7:1 Single 90 0.00014
10:1 Single 90 0.0000735
16:1 Double 85 0.0000412
22:1 Double 85 0.000399
28:1 Double 85 0.000394
40:1 Double 85 0.000789
49:1 Double 85 0.000148
55:1 Double 85 0.000077
70:1 Double 85 0.0000762
100:1 Double 85 0.0000755
NEMA 34 Planetary Gear Head
Ratio Stage Efficiency % Inertia Reflected Back to Motor Pinion (oz-in-sec^2)
3:1 Single 90 0.00432
4:1 Single 90 0.00267
5.5:1 Single 90 0.00149
7:1 Single 90 0.000951
10:1 Single 90 0.00048
16:1 Double 85 0.00227
22:1 Double 85 0.00217
28:1 Double 85 0.00213
40:1 Double 85 0.000404
49:1 Double 85 0.000755
55:1 Double 85 0.000387
70:1 Double 85 0.000381
100:1 Double 85 0.000376
NEMA 42 Planetary Gear Head
Ratio Stage Efficiency % Inertia Reflected Back to Motor Pinion (oz-in-sec^2)
3:1 Single 90 0.0142
4:1 Single 90 0.00846
5.5:1 Single 90 0.0046
7:1 Single 90 0.00287
10:1 Single 90 0.00142
16:1 Double 85 0.00855
22:1 Double 85 0.00823
28:1 Double 85 0.00811
40:1 Double 85 0.00143
49:1 Double 85 0.00274
55:1 Double 85 0.00137
70:1 Double 85 0.00136
100:1 Double 85 0.00134

 

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