---
product_id: 10243204
title: "STEPPERONLINE 51:1 Planetary Gearbox High Torque Nema 17 Stepper Motor Precision Camera DIY"
brand: "stepperonline"
price: "¥14803"
currency: JPY
in_stock: true
reviews_count: 7
category: "Stepperonline"
url: https://www.desertcart.jp/products/10243204-stepperonline-51-1-planetary-gearbox-high-torque-nema-17-stepper
store_origin: JP
region: Japan
---

# 0.035° ultra-precise step angle 4Nm high holding torque 51:1 planetary gearbox ratio STEPPERONLINE 51:1 Planetary Gearbox High Torque Nema 17 Stepper Motor Precision Camera DIY

**Brand:** stepperonline
**Price:** ¥14803
**Availability:** ✅ In Stock

## Summary

> ⚙️ Power Precision, Own the Moment

## Quick Answers

- **What is this?** STEPPERONLINE 51:1 Planetary Gearbox High Torque Nema 17 Stepper Motor Precision Camera DIY by stepperonline
- **How much does it cost?** ¥14803 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/10243204-stepperonline-51-1-planetary-gearbox-high-torque-nema-17-stepper)

## Best For

- stepperonline enthusiasts

## Why This Product

- Trusted stepperonline brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Gearbox Mastery:** The integrated 51:1 planetary gearbox ensures maximum torque multiplication and minimal backlash (≤1°), giving you rock-solid control.
- • **Plug & Play Confidence:** Optimized for constant current drivers, this motor guarantees reliable performance—just connect and command with zero compromise.
- • **Built for Professionals:** Compact NEMA 17 frame with a durable metal build and 4-wire bipolar design ensures seamless integration into your precision projects.
- • **Precision in Every Turn:** Achieve ultra-smooth, micro-stepped motion with a razor-sharp 0.035° step angle—perfect for high-accuracy camera rigs and DIY robotics.
- • **Torque That Means Business:** Delivering a robust 4Nm holding torque, this motor powers through demanding low-speed applications without breaking a sweat.

## Overview

The STEPPERONLINE 51:1 Planetary Gearbox NEMA 17 Stepper Motor combines a high-torque 4Nm output with an ultra-fine 0.035° step angle, thanks to its integrated 50.9:1 planetary gearbox. Designed for low-speed, high-precision applications like camera control and DIY automation, it features a robust metal frame, bipolar 4-wire configuration, and requires a constant current driver for optimal performance. This motor is the go-to choice for professionals demanding accuracy and power in compact form.

## Description

This high precision NEMA 17 stepper motor has a built-in planetary gearbox with a speed ratio of 50.9:1, the resolution reaches 0.035 deg. step angle. It is a good solution in applications that require very low rotational speeds and/or a lot of torque. Electrical Specifications: * Manufacturer part number: 17HS19-1684S-PG51 * Motor type: bipolar stepper * Step angle: 0.035 deg. * Holding torque: 4Nm * Rated Current/Phase: 1.68A * Phase Resistance: 1.65ohms * Inductance: 2.8mH+/-20% (1KHz) Gearbox Features * Gearbox Type: Planetary * Gear Ratio: 50.9:1 * Efficiency: 73% * Backlash to No-load: <=1 deg. * Maximum permissible torque: 4Nm(6000g) * Allowable Torque: 6 Nm(950 oz) * Maximum shaft axial load: 50N * Maximum shaft radial load: 100N Physical characteristics: * Frame size: 42 x 42 mm * Motor length: 48 mm * Gearbox length: 42.7 mm * Shaft diameter: 8 mm * Shaft length: 20 mm * D Cut Length: 15mm * Number of tracks: 4 * Lead length: 500 mm * Weight: 620g Connection: Black(A+), Green(A-), Red(B+), Blue(B-) WARNING: Make sure the motor connects to a constant current drive controller or chopper before testing the motor. Connecting the motor directly to a power supply will destroy the motor.

Review: Works as described - This 50:1 (well, if you are going to be a detail person it's 51:1) gearboxed NEMA 17 works as advertised. My project needed more torque than speed, and this did the trick. Overall, I'm really quite pleased. That said, there are a couple of things about this unit. First, it is quite heavy, considerably more so than the motor alone. I was surprised (maybe I shouldn't have been, but I was.) Second, as another reader pointed out, mounting holes DO NOT follow standard NEMA 17 design. Look at the user guide/spec sheet prior to final design. I don't see points (1) or (2) as negatives. Third, the motor is hard wired rather than have a detachable harness. Minor negative. Fourth, there is a small amount of play/backlash, but the device was within spec. At this price, performance is more than satisfactory. Overall I am happy and would certainly buy again if I needed a gearboxed stepper.
Review: Excellent Stepper Motor with Gearbox - This motor performed as expected. It was used with the "Steperonlinee CNC Stepper Motor Driver and was easy to set up. We used it to drive feed rollers for feeding 1/8 inch diameter rubber into a tubing cutter. This made it possible to accurately control the length of the pieces of rubber being cut off.

## Features

- High Torque Low Speed
- 0.035 deg. Step Angle
- NEMA 17 bipolar 4-wire
- Planetary Gearbox Ratio 50.9:1
- Rated current 1.68A & resistance 1.8ohms

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00QEVLDVO |
| Best Sellers Rank | #314,076 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #207 in 3D Printer Motors |
| Brand | STEPPERONLINE |
| Brand Name | STEPPERONLINE |
| Customer Reviews | 4.2 out of 5 stars 37 Reviews |
| Item Dimensions W x H | 1.66"W x 1.66"H |
| Item Weight | 620 Grams |
| Manufacturer | OSM Technology Co.,Ltd. |
| Material | Metal |
| Material Type | Metal |
| Model | 17HS19-1684S-PG51 |
| Model Name | gear |
| Product Dimensions | 1.66"W x 1.66"H |
| Speed | 4 RPM |
| UPC | 701056517046 |
| Voltage | 12 Volts |

## Product Details

- **Brand:** STEPPERONLINE
- **Model Name:** gear
- **Product Dimensions:** 1.66"W x 1.66"H
- **Speed:** 4 RPM
- **Voltage:** 12 Volts

## Images

![STEPPERONLINE 51:1 Planetary Gearbox High Torque Nema 17 Stepper Motor Precision Camera DIY - Image 1](https://m.media-amazon.com/images/I/61vD32svnBL.jpg)

## Questions & Answers

**Q: Will powering this motor with a 12v 2A power supply cause damage? The motor is rated for 12v at 1.68A**
A: No. The IV relation is fixed, meaning when you apply a certain voltage, a corresponding amount of current will flow. Due to the resistances of the windings, when you apply 12 V, only 1.68 A will flow by design. If you try to force 2A, then you will need a higher voltage.

With that being said, it is better to use a stepper motor controller IC instead of driving the motor directly from the power supply.

**Q: How noisy is this motor?**
A: It has been a long time since I purchased this gear motor and put it service, but do not remember it as being at all noisy.

**Q: How much torque is necessary to backdrive this gearbox? I am looking for a backdrivable gearbox.**
A: Are you refering to the gearbox alone or the gearbox plus the motor? The gearbox will simply amplify the amount of torque: if it's a 1:100 gearbox, for backdriving, you need 100 times the torque compared to backdriving the stepper motor shaft directly. As for the actual torque in the presence of the motor, it varies depending on how much current is flowing through the motor.

As a crude estimate, even without any current flowing, it is VERY difficult for an average adult male to backdrive the shaft of the gearbox.

**Q: Is this kind of motor (with planetary gearbox) necessary for the construction of a syringe pump, or can i use just a nema 17 stepper motor?**
A: I have used the nema 17 stepper motor for making a syringe pump with no gearbox using a leadscrew just fine for up to 25mL syringes. The leadscrew provides sufficient gearing itself. There is a good open source version on university of British Columbia. Possibly a larger syringe would necessitate a gearbox

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works as described
*by E***E on July 17, 2020*

This 50:1 (well, if you are going to be a detail person it's 51:1) gearboxed NEMA 17 works as advertised. My project needed more torque than speed, and this did the trick. Overall, I'm really quite pleased. That said, there are a couple of things about this unit. First, it is quite heavy, considerably more so than the motor alone. I was surprised (maybe I shouldn't have been, but I was.) Second, as another reader pointed out, mounting holes DO NOT follow standard NEMA 17 design. Look at the user guide/spec sheet prior to final design. I don't see points (1) or (2) as negatives. Third, the motor is hard wired rather than have a detachable harness. Minor negative. Fourth, there is a small amount of play/backlash, but the device was within spec. At this price, performance is more than satisfactory. Overall I am happy and would certainly buy again if I needed a gearboxed stepper.

### ⭐⭐⭐⭐⭐ Excellent Stepper Motor with Gearbox
*by A***R on March 28, 2019*

This motor performed as expected. It was used with the "Steperonlinee CNC Stepper Motor Driver and was easy to set up. We used it to drive feed rollers for feeding 1/8 inch diameter rubber into a tubing cutter. This made it possible to accurately control the length of the pieces of rubber being cut off.

### ⭐⭐⭐⭐ NICE UNIT! Arrived on time and at a great price for a unit with a planetary gear box.
*by C***D on June 7, 2023*

Appears to be able to do my job. Have not yet applied power or control to it. I was surprised to see that the planetary gear set was made with plastic gears however. Seems to me that a 51:1 gear reduction may be able to build a lot of torque and gears may bear the brunt of that. Metal gears would be better, I think! But I will see soon. It will be used to provide input to a NV40 100:1 worm gear reduction gear box ( I need a very slow rpm output for a radio telescope drive system). I think this will work out ok.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-16*