Finding the right planetary gearbox for a NEMA 17 stepper motor can dramatically improve torque, control, and precision in CNC machines, 3D printers, and automation projects. This guide highlights five top STEPPERONLINE planetary gearbox options, chosen for reliability, torque, and versatility. Each product includes a quick overview of key specs and a direct link to the Amazon listing for convenience.
| Product | Gear Ratio | Motor Type | Torque/Notes |
|---|---|---|---|
| 5:1 Planetary Gearbox | 5:1 | Nema 17 | Moderate torque, compact |
| 10:1 Planetary Gearbox (30 arc-min) | 10:1 | Nema 17 | Precise, short shaft |
| 10:1 Planetary Gearbox (15 arc-min) | 10:1 | Nema 17 | Low backlash, quiet |
| 100:1 Planetary Gearbox | 100:1 | Nema 17 | High torque at low speed |
| 27:1 Planetary Gearbox | 27:1 | Nema 17 | Balanced torque and speed |
STEPPERONLINE 5:1 Planetary Gearbox Nema 17
The 5:1 planetary gearbox is designed for compact projects where space is at a premium. It pairs with a NEMA 17 bipolar stepper motor and delivers a solid holding torque of 1.68 Nm with a rated current per phase of 1.68A. The gearbox type is planetary, with a frame size of 42 x 42 mm. Typical applications include small CNC axes, hobbyist routers, and compact 3D printers. This option emphasizes reliable torque multiplication in a compact footprint.
STEPPERONLINE Planetary Gearbox 10:1 (30 arc-min)
This 10:1 planetary gearbox targets precise motion control with a compact form factor suitable for short shaft length NEMA 17 motors (9.5 mm shaft). It excels in CNC devices, small robotic arms, and 3D printers requiring accurate torque amplification without excessive length. The design balances torque, speed, and integration ease in tight spaces.
STEPPERONLINE Planetary Gearbox 10:1 (15 arc-min)
This 10:1 planetary reducer features a very low backlash of 15 arc-min for precise micro-motion control. It is designed for NEMA 17 motors with a 42 mm flange and provides stable long-term performance with low noise, making it suitable for precision robotics and camera systems, as well as compact automation tasks.
STEPPERONLINE 100:1 Planetary Gearbox
Ideal for high-torque, low-speed applications, the 100:1 gearbox delivers substantial torque multiplication for demanding tasks like slow, high-load feeds in CNC and auto-control systems. It operates with a NEMA 17 bipolar 4-wire motor and offers a reduction in speed with consistent torque at low RPM, suited for precise positioning tasks and heavy lifting in compact builds.
STEPPERONLINE 27:1 Planetary Gearbox
The 27:1 planetary gearbox is designed for a balanced combination of torque and speed, featuring a 0.067 deg step angle for NEMA 17 bipolar 4-wire motors. It is well-suited for compact automated systems where both movement precision and responsive speed are essential, such as small milling or engraving machines and precise positioning stages.
Buying Guide
Key considerations when selecting a planetary gearbox for a stepper motor include gear ratio, backlash, motor compatibility, physical footprint, and torque needs. A higher gear ratio typically provides greater torque at the expense of speed; choose based on whether you need smooth, high-precision motion or faster travel with moderate torque. Backlash is crucial for repeatable positioning—lower values (arc-min) minimize positional drift. Verify flange and shaft dimensions to ensure compatibility with your NEMA 17 motor. Material quality and lubrication affect long-term reliability in CNC or robotics environments. Consider noise levels, installation space, and ease of integration with existing control systems. Compare multiple ratios (5:1, 10:1, 27:1, 100:1) to match your project’s torque, speed, and stiffness requirements. For lightweight, precise tasks, the 15–30 arc-min variants are often preferred; for high-load, slow-speed operations, higher ratios like 100:1 offer significant torque gains. Finally, confirm the motor current and voltage compatibility to protect motor drivers and ensure consistent performance across operating temperatures.