---
product_id: 407992972
title: "Planetary Gearbox 20:1 Nema 34 Gear Head 1/2\" Input Shaft,3000rpm Speed Reducer for Stepper Motor, D16mm Shaft Ouput (20:1)"
brand: "bestopper"
price: "€ 272.82"
currency: EUR
in_stock: true
reviews_count: 2
category: "Bestopper"
url: https://www.desertcart.nl/products/407992972-planetary-gearbox-20-1-nema-34-gear-head-1-2
store_origin: NL
region: Netherlands
---

# NEMA 34 standard flange 3000rpm max input speed 20:1 precision gear ratio Planetary Gearbox 20:1 Nema 34 Gear Head 1/2" Input Shaft,3000rpm Speed Reducer for Stepper Motor, D16mm Shaft Ouput (20:1)

**Brand:** bestopper
**Price:** € 272.82
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate your CNC game with torque and precision that won’t quit!

## Quick Answers

- **What is this?** Planetary Gearbox 20:1 Nema 34 Gear Head 1/2" Input Shaft,3000rpm Speed Reducer for Stepper Motor, D16mm Shaft Ouput (20:1) by bestopper
- **How much does it cost?** € 272.82 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/407992972-planetary-gearbox-20-1-nema-34-gear-head-1-2)

## Best For

- bestopper enthusiasts

## Why This Product

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

## Key Features

- • **Compact Powerhouse Design:** Small footprint fits tight machine spaces without compromise
- • **Precision Speed Reduction:** 20:1 gear ratio optimizes torque while controlling speed with surgical accuracy
- • **Robust Installation Ready:** Includes 4 mounting screws for quick, secure setup—no downtime
- • **Torque that Commands Respect:** Up to 80N·m max holding torque for powerhouse performance
- • **Seamless NEMA 34 Compatibility:** Perfectly matches 86mm flange stepper motors for plug-and-play ease

## Overview

This Planetary Gearbox features a 20:1 gear ratio with a 1/2" input shaft and 16mm output shaft, designed to fit NEMA 34 stepper motors (86mm flange). It supports up to 3000rpm input speed and delivers a rated holding torque of 50N·m, peaking at 80N·m max torque. Compact and easy to install with included screws, it’s ideal for CNC machines, lathes, and packaging equipment requiring precise speed reduction and enhanced torque in limited spaces.

## Description

Planetary Gearbox 20:1 Nema 34 Gear Head 1/2" Input Shaft,3000rpm Speed Reducer for Stepper Motor, D16mm Shaft Ouput (20:1): desertcart.com: Industrial & Scientific

Review: Mine didn't last, but I mounted it wrong and expected too much. - I used this for a whacky project - I had the output shaft supporting the load... so - torque and moment. So it didn't last.

## Features

- Input shaft bore is 1/2" that can match the 12.7mm shaft motor (without key). The output shaft diameter is 16mm
- The gearhead has nema 34 Input & output flange,suitable for flange 86mm stepper motor and other motors which can completely match the installation size .
- 20:1 gear ratio ,the rated holding torque is 50N.m and the Max. holding torque is 80N.m
- 4pcs screws provide for instalaltion , small size gearbox , very convenient for the machine which has limited space for a gearbox.
- This nema34 planetary gearbox mainly matches the stepper motor to reduce speed and increase torque. Widely used in CNC field on mill,lathe,bench,packaging machine etc.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09H5D159B |
| Best Sellers Rank | #197,438 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #52 in Gearboxes, Gearheads & Speed Reducers |
| Date First Available | September 18, 2021 |
| Item Weight | 4.84 pounds |
| Item model number | 86PX FBA |
| Manufacturer | Bestopper |
| Package Dimensions | 7.87 x 7.87 x 7.87 inches |

## Product Details

- **Brand:** Bestopper
- **Item Weight:** 2.2 Kilograms
- **Manufacturer:** Bestopper
- **Speed:** 3000 RPM

## Images

![Planetary Gearbox 20:1 Nema 34 Gear Head 1/2" Input Shaft,3000rpm Speed Reducer for Stepper Motor, D16mm Shaft Ouput (20:1) - Image 1](https://m.media-amazon.com/images/I/51vL8bFwVbL.jpg)
![Planetary Gearbox 20:1 Nema 34 Gear Head 1/2" Input Shaft,3000rpm Speed Reducer for Stepper Motor, D16mm Shaft Ouput (20:1) - Image 2](https://m.media-amazon.com/images/I/61ythPn1B-L.jpg)
![Planetary Gearbox 20:1 Nema 34 Gear Head 1/2" Input Shaft,3000rpm Speed Reducer for Stepper Motor, D16mm Shaft Ouput (20:1) - Image 3](https://m.media-amazon.com/images/I/71ubCxNZkSL.jpg)
![Planetary Gearbox 20:1 Nema 34 Gear Head 1/2" Input Shaft,3000rpm Speed Reducer for Stepper Motor, D16mm Shaft Ouput (20:1) - Image 4](https://m.media-amazon.com/images/I/61xJ0LPbtXL.jpg)
![Planetary Gearbox 20:1 Nema 34 Gear Head 1/2" Input Shaft,3000rpm Speed Reducer for Stepper Motor, D16mm Shaft Ouput (20:1) - Image 5](https://m.media-amazon.com/images/I/51cnUpyFEeL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by N***N on April 12, 2022*



### ⭐⭐⭐⭐ Mine didn't last, but I mounted it wrong and expected too much.
*by T***D on September 21, 2022*

I used this for a whacky project - I had the output shaft supporting the load... so - torque and moment. So it didn't last.

## Frequently Bought Together

- 1/2" Planetary Gearbox 20:1 Nema 34 Gear Head 3000rpm Speed Reducer for Stepper Motor, D16mm Shaft Ouput, DHL/FedEx Ship (20:1)
- Nema 34 Stepper Motor Steel Mounting Bracket with Mounting Screws
- DROK 48V Power Supply, AC 110V/220V to DC 0-48V 10A 480W Buck Converter, Adjustable Variable LED Adapter Regulated 5V 12V 24V 30V 36V 48V Volt Voltage Transformer 10A Amp Charger for Lab CCTV

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.nl/products/407992972-planetary-gearbox-20-1-nema-34-gear-head-1-2](https://www.desertcart.nl/products/407992972-planetary-gearbox-20-1-nema-34-gear-head-1-2)

---

*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-18*