# Bipolar Stepper Motor with Planet Gear Box (18kg.cm)

**Type:** Product page · **SKU:** FIT0349 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/bipolar-stepper-motor-with-planet-gear-box-18kg-cm.html ([markdown](https://core-electronics.com.au/bipolar-stepper-motor-with-planet-gear-box-18kg-cm.html.md))

This is a bipolar stepper motor with a planetary gearbox (gear ratio: 5.18) and uses a standard 8mm-diameter D type output shaft, with a 1.8° step angle (200 steps/revolution).

## Pricing

- **Price:** $68.65 (inc GST) — $62.41 AUD, exc GST
- **Quantity discounts:** 6+ $59.29 (exc GST) · 12+ $56.79 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 24 and Aug 28.

## Description

This bipolar stepper motor with a planet gearbox (gear ratio: 5.18) uses a standard 8mm-diameter D-type output shaft and has a 1.8° step angle (200 steps/revolution). Each phase draws 1.0 A at 3.4 V, allowing for a holding torque of 18kg-cm (176N-cm) (200rpm). The motor has a body dimension of 42mm square and 40mm in length, while the planet gearbox is 36mm in diameter and 27mm in length. The motor has four colour-coded wires terminated with bare leads: black and green connect to one coil; red and blue connect to the other. It can be easily mounted with 4 M3 threaded holes and can be controlled with the [Dual Bipolar Stepper Motor Shield for Arduino (DRV8825)](https://core-electronics.com.au/dual-bipolar-stepper-motor-shield-for-arduino-a4988.html). Notice: please carefully confirm techical details (torque, dimension, mounting, etc) for your project(s) before purchasing.

![](https://core-electronics.com.au/attachments/localcontent/FIT0349-Dimension_31982ad65ba.jpg)

## APPLICATIONS

- Printer
- 3D Printer
- CNC
- Robotics
- Linear Actuators
 
## SPECIFICATION

- Model No: 42BYGH40-18-22A-C5.18
- Step Angle (degrees) :1.8
- 2 Phase
- Voltage: 3.4V
- Current: 1.0A
- Resistance: 1.7±10% Ohm/Phase
- Inductance: 4.3±20% mH/Phase
- Holding Torque: 3600 g.cm
- Detent Torque: 400 g.cm
- Insulation Class: B
- Life: 6000 hours
- Gear Ratio: 5.18:1
- Hold Torque with Gearbox: 18kg·cm (176N·cm) (200rpm)
- Dimension: 42×42×40mm(1.65x1.65x1.57")
- Mounting: 4 x M3
 
## DOCUMENTS

- [Mechanic Datasheet](https://core-electronics.com.au/attachments/localcontent/FIT0349-42BYGH40-18-22A-C5_10488d31b79.pdf)
 
## SHIPPING LIST

- Stepper Motor with Planet Gear Box ×1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/f/i/fit0349.jpg)