
Planetary Gearbox for MDrive34AC Plus2
MDrive34AC Plus2 Planetary Gearbox Parameters
| 
 | Permitted | Gearbox | Maximum | 
 | Output Side with Ball Bearing | |||
| 
 | Output Torque | Efficiency | Backlash | Maximum Load | 
 | Weight | ||
| 
 | 
 | (oz/g) | ||||||
| 
 | 
 | 
 | 
 | |||||
| 
 | 
 | 
 | Radial | Axial | Gearbox | 
 | with Flange | |
| 
 | 
 | 
 | 
 | 
 | ||||
| 2832/20.0 | 0.80 | 1.0° | 90/400 | 18/80 | 64.4/1827 | 
 | 66.7/1890 | |
| 8496/60.0 | 0.75 | 1.5° | 135/600 | 27/120 | 89.5/2538 | 
 | 92.6/2625 | |
| 16992/120.0 | 0.70 | 2.0° | 225/1000 | 45/200 | 92.6/2625 | 
 | 118.5/3360 | |
Table B.2: Planetary Gearbox Specifications – PM81
*Gearbox without Flange
†Gearbox with Flange
4x Ø 0.217 (Ø5.5) Hole†
M6 x 0.472 (12.0) Deep*
3.386 SQ. (86.0 SQ.)
| 0.030) | 0.0008 | ||
| 0.010) | - | ||
| 
 | † | 
 | 
 | 
| +0.0006/ | 0.0012 | 
 | 
 | 
| +0/ | - | ||
| - | - | - 0.021) | |
| +0.015/50.0 | 73.0+0/ | +0/ | |
| 1.969 | 2.874 | +0/19.0 | |
| Ø (Ø or Ø (Ø | 0.748 | ||
| 
 | 
 | Ø (Ø | |
| 
 | 
 | ||
| 
 | 
 | 
 | 
 | 
| 
 | 
 | 
 | 
 | 
| 
 | 
 | 
 | 
 | 
1.929*
(49.0)
or
1.811†
(46.0)
1.575  (40.0)
 (40.0)

 K1 ±0.02 (±0.5)
 K1 ±0.02 (±0.5)
0.197*(5.0) or 0.079(2.0)†
| 
 | 
 | MDrive34Plus | 
| Ø 3.189 (Ø 81.0) | ||
| 
 | 
 | |
| 
 | 
 | 
 | 
Ø2.56*  (Ø 65.0)
 (Ø 65.0)
2.739 SQ.†
 (69.58 SQ.)
 (69.58 SQ.)
Ctrg. DIN 
Key DIN 
0.394†  (10.0)
 (10.0)
| 
 | Dimensions in inches (mm) | |
| Stages | K1 | K1 | 
| 
 | (Gearbox) | (NEMA Flange) | 
| 4.315 (109.6) | 4.433 (112.6) | |
| 5.169 (131.3) | 5.287 (134.3) | |
| 6.024 (153.0) | 6.142 (156.0) | |
Figure B.7: Planetary Gearbox Specifications for MDrive34AC Plus2
PM81 Gearbox Ratios and Part Numbers
| Planetary | Ratio | Part | 
 | 
| Gearbox | (Rounded) | Number | 
 | 
| 3.71:1 | G1A1 | 
 | |
| 5.18:1 | G1A2 | 
 | |
| 6.75:1 | G1A3 | 
 | |
| 
 | 
 | 
 | 
 | 
| 13.73:1 | G1A4 | 
 | |
| 15.88:1 | G1A5 | 
 | |
| 18.37:1 | G1A6 | 
 | |
| 19.20:1 | G1A7 | 
 | |
| 22.21:1 | G1A8 | 
 | |
| 25.01:1 | G1A9 | 
 | |
| 26.85:1 | G1B1 | 
 | |
| 28.93:1 | G1B2 | 
 | |
| 34.98:1 | G1B3 | 
 | |
| 45.56:1 | G1B4 | 
 | 
| Planetary | Ratio | Part | 
| Gearbox | (Rounded) | Number | 
| 50.89:1 | G1B5 | |
| 58.86:1 | G1B6 | |
| 68.07:1 | G1B7 | |
| 71.16:1 | G1B8 | |
| 78.72:1 | G1B9 | |
| 92.70:1 | G1C1 | |
| 95.18:1 | G1C2 | |
| 99.51:1 | G1C3 | |
| 107.21:1 | G1C4 | |
| 115.08:1 | G1C5 | |
| 123.98:1 | G1C6 | |
| 129.62:1 | G1C7 | |
| 139.14:1 | G1C8 | |
| 149.90:1 | G1C9 | |
| 168.85:1 | G1D1 | |
| 181.25:1 | G1D2 | |
| 195.27:1 | G1D3 | |
| 236.10:1 | G1D4 | |
| 307.55:1 | G1D5 | 
Table B.3: Planetary Gearbox Ratios and Part Numbers
| MDriveAC Plus Microstepping Hardware - Revision R121707 | |
| 
 | Relevant to Firmware Version 3.0.02 | 
