All features:
- dual ball bearings
- some include prop adapter
- sturdy metal construction
- some include multiple pinions
- motor sold separately
- some include prop adapter
- sturdy metal construction
- some include multiple pinions
- motor sold separately
Manual
| Part No. | Gear Ratio | Pinion | Mounting Spacing | Wt oz | Shaft Dia | Applications |
| ACC347 Manual |
2, 2.5, 3 | 2.3mm, set screw | 16mm | 0.8 | 5/32" | Speed 400 |
| ACC387 | 2, 2.5 | 1/8", set screw | 16mm | 0.8 | 5/32" | Promax Cobalt 400, 480 |
| ACC365 | 2.9 | 3mm, set screw | 25mm | 1.5 | 5/32" | Speed 500, 600 |
| ACC349 | 2.9 | 2mm, press fit | 12mm | 0.4 | 3mm | 180 motor |