Source Engineering’s planetary gearhead and stepping motor line offers a variety of the cost effective high performance solutions. With its high torque capabilities and its small foot print this gearmotor can be used in a wide variety of applications. The combination consists of a high torque stepping motor with a cost effective planetary gearbox that’s designed for OEM applications. Our NEMA 8, 11, 14, 16, 17, 23 and 24 stepping motors can all be matched to a gearhead that will give you optimal performance for your application. The planetary gearbox comes in multiple stages with ratios ranging from 4:1 up to 512:1 and torque capabilities up to 5500 oz-in. Other options such as encoders, special output shafts, cut gears, hardened gears, plastic molded gears and cabling are available upon request.

22mm Diameter Planetary Gearbox
22PA-20BYG
Features:
- NEMA 8 Stepping motor
- Gear Ratios from 4:1 up to 107:1
- Rated Output Torque up to 0.9 Nm(125 oz-in)
Options: Cut Gears, Hardened Gears and Plastic Gears, Connectors and Cabling, Modified Shafts, Custom Windings

28mm Diameter Planetary Gearbox
28PA-28BYG
Features:
- NEMA 11 Stepping motor
- Gear Ratios from 4:1 up to 139:1
- Rated Output Torque up to 3.9NM (555 oz-in)
Options: Cut Gears, Hardened Gears and Plastic Gears, Connectors and Cabling, Modified Shafts, Custom Windings

32mm Diameter Planetary Gearbox
32PA-35BYG
Features:
- NEMA 14 Stepping motor
- Gear Ratios from 4:1 up to 139:1
- Rated Output Torque up to 3.9NM (555 oz-in)
Options: Cut Gears, Hardened Gears and Plastic Gears, Connectors and Cabling, Modified Shafts, Custom Windings

36mm Diameter Planetary Gearbox
36PA-39BYG
Features:
- NEMA 16 Stepping motor
- Gear Ratios from 4:1 up to 139:1
- Rated Output Torque up to 3.9NM (555 oz-in)
Options: Cut Gears, Hardened Gears and Plastic Gears, Connectors and Cabling, Modified Shafts, Custom Windings

36mm Diameter Planetary Gearbox
36PA-42BYG
Features:
- NEMA 17 Stepping motor
- Gear Ratios from 4:1 up to 139:1
- Rated Output Torque up to 3.9NM (555 oz-in)
Options: Cut Gears, Hardened Gears, Connectors and Cabling, Modified Shafts, Custom Windings

40mm Diameter Planetary Gearbox
40PA-42BYG
Features:
- NEMA 17 Stepping motor
- Square Flange Mount
- Gear Ratios from 4:1 up to 125:1
- Rated Output Torque up to 3.9NM (555 oz-in)
Options: Cut Gears, Hardened Gears, Connectors and Cabling, Modified Shafts, Custom Windings

52mm Diameter Planetary Gearbox
52PA-57BYG
Features:
- NEMA 23 Stepping motor
- Gear Ratios from 4:1 up to 512:1
- Rated Output Torque up to 24NM (3400 oz-in)
Options: Cut Gears, Hardened Gears, Connectors and Cabling, Modified Shafts, Custom Windings

56mm Diameter Planetary Gearbox
56PA-57BYG
Features:
- NEMA 23 Stepping motor
- Gear Ratios from 4:1 up to 77:1
- Rated Output Torque up to 39Nm (5555 oz-in)
Options: Cut Gears, Hardened Gears, Connectors and Cabling, Modified Shafts, Custom Windings