---
product_id: 383526598
title: "Redrex Dual Gear Ender 3 Extruder with Two Washers Metal Drive Feeder Upgrade Kit Compatible with Creality Ender 3 V2 Pro,Ender 3 Neo Series,CR10 3D Printer TPU Filament Supported(Motor Shaft>20mm)"
brand: "redrex"
price: "$50"
currency: NZD
in_stock: true
reviews_count: 9
category: "Redrex"
url: https://www.desertcart.nz/products/383526598-redrex-dual-gear-ender-3-extruder-with-two-washers-metal
store_origin: NZ
region: New Zealand
---

# Dual gear extrusion for firm grip Adjustable spring tension for precision Upgraded idler gear with dual washers Redrex Dual Gear Ender 3 Extruder with Two Washers Metal Drive Feeder Upgrade Kit Compatible with Creality Ender 3 V2 Pro,Ender 3 Neo Series,CR10 3D Printer TPU Filament Supported(Motor Shaft>20mm)

**Brand:** redrex
**Price:** $50
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate Your 3D Printing Game with Rock-Solid Dual Gear Precision!

## Quick Answers

- **What is this?** Redrex Dual Gear Ender 3 Extruder with Two Washers Metal Drive Feeder Upgrade Kit Compatible with Creality Ender 3 V2 Pro,Ender 3 Neo Series,CR10 3D Printer TPU Filament Supported(Motor Shaft>20mm) by redrex
- **How much does it cost?** $50 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/383526598-redrex-dual-gear-ender-3-extruder-with-two-washers-metal)

## Best For

- redrex enthusiasts

## Why This Product

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

## Key Features

- • **Durability Meets Design:** Innovative idler gear with two washers prevents gear wear and extends extruder lifespan.
- • **Unmatched Filament Control:** Dual gear mechanism grips filament firmly, reducing jams and deformation for flawless prints.
- • **Pro-Level Calibration Ready:** Optimized for 139 e-steps/mm with easy gear lubrication and filament detector height adjustment.
- • **Precision Tuning at Your Fingertips:** Spring tension adjustable via screw for tailored extrusion accuracy and smooth feeding.
- • **Broad Compatibility, Seamless Upgrade:** Fits Ender 3 V2, Pro, Neo series, CR10, and more—perfect for motor shafts >20mm.

## Overview

The Redrex Dual Gear Ender 3 Extruder Upgrade Kit is a robust all-metal extruder designed for Creality Ender 3 V2, Pro, Neo series, and CR10 3D printers with motor shafts over 20mm. Featuring a dual gear drive for superior filament grip, upgraded idler gears with dual washers to prevent wear, and an adjustable spring tension system, it significantly reduces filament jams and improves print accuracy. This kit requires recalibration to 139 e-steps/mm and minor setup tweaks for optimal performance, making it the go-to budget-friendly upgrade for professional-grade 3D printing reliability.

## Description

desertcart.com: Redrex Dual Gear Ender 3 Extruder with Two Washers Metal Drive Feeder Upgrade Kit Compatible with Creality Ender 3 V2 Pro,Ender 3 Neo Series,CR10 3D Printer TPU Filament Supported(Motor Shaft>20mm) : Industrial & Scientific

Review: So far so good--try this one first! - Bought this extruder for my 2020 model CR-10 after I had inconsistent extrusion and skipping on my prints from my aluminum single gear extruder and tried everything else I could think of to fix it. A few things off the top of my head: -As other reviews have pointed out, this version of the low-cost dual gear design includes washers to prevent the gears from grinding off the aluminum as they turn--this is the only one I've seen on desertcart that acknowledges that design flaw! -An issue that I HAVEN'T seen in reviews (probably because it's such an obscure upgrade) is that, while it IS compatible with the CR-10, it's not perfectly compatible with the PrinterMods direct drive upgrade right out of the box. This extruder is substantially thicker than the stock Creality one the PrinterMods upgrade is designed for, so the M3x25 screws included with that upgrade are /just/ too short to mount the motor + extruder to the printhead, and the screws you get with this package DEFINITELY aren't long enough to do the job. I'll update this review later to see how it works in action, but PrinterMods users--you WILL need to replace the two M3x25 screws you used to mount the motor to the printhead with M3x35, and I recommend adding a matching nut to ensure you can screw it all the way in. (It's overkill, but I ordered the iexcell M3 screw variety pack with the 50 nuts and five different lengths of screws--it's only ~$9 on desertcart though, so unless you found a cheaper M3x35 nut and bolt pack, that's what I can personally recommend.) -Definitely recalibrate your e-steps after you install this--in my case the included suggestion of 139 steps/mm was spot on, but it doesn't hurt to use this as a starting point for your calibration, since either way you're going to need to bump up your e-steps from stock for this kind of extruder. -If you're confused on how to install this, check out CHEP's video specifically about installing them. The included instructions are pretty vague if you haven't done extruder upgrades before, but I think that video is super easy to follow for beginners. Like I said, so far so good--after calibrating e-steps this extruder consistently extrudes the amount of filament you tell it to, has a firm grip on the filament without grinding it down or biting into it too deeply (at least with PLA--I'll see about PETG and other filaments one of these days), and shows no sign of slippage. Again, since I need to get longer screws to mount it on my particular setup, I'll update this review later to see how it works extruding hot filament proper, but if you need a solid dual gear extruder and don't want to break the bank, get THIS one! UPDATE 9/14/22: So I managed to finally get this thing mounted and tested extruding hot filament and it works beautifully! I won't knock off a star for this, but I WILL note that, for my extruder, I had to chamfer the second hole that fed the filament through the PTFE tubing a bunch since the gears didn't perfectly line up with that hole, making it so not only did I have difficulty feeding filament through, but it shaved off the filament as the extruder worked. This extruder is solid in every other aspect but this one, and while I would still certainly recommend it over other dual gear models on desertcart, I would advise having a needle file on hand just in case your hole(s) are misaligned/undersized. You get what you pay for, as they say. UPDATE: 9/23/22: After some fairly light but solid use, I can safely say that this is very likely your best budget dual gear option on desertcart right now. My only gripe that still remains is that it's finicky to actually get the filament through the gears AND to the hotend, but I imagine that's just because of my own weird setup, and I've heard that people have issues feeding filament through their stock/single-extruder setups anyways. If you're like me and you're patient (and desperate) enough to stick with it once you buy it, I still recommend getting a needle file just in case you need to widen the feed hole--after adding extra clearance it works just fine and no longer shaves away the filament.
Review: low torque is useful!!! - This ungeared (i.e. 1:1 stepper torque) dual extruder yields significantly lower feed pressure compared to the stock extruder from my Anycubic i3 Mega with 3:1 gear reduction, and that may be a good thing. My old stock extruder left a stronger bite in the filament when flowing normally, and severely chewed into the filament during hotend stalls and jams. In contrast, this dual gear extruder leaves a gentler (2-sided) bite during normal flow, and when the hotend slows down, the stepper motor cogs before the filament slips and chaffs. The end result is there's no noticeable chew in the filament after jams. Great! I don't need to trim filament anymore after jams. The downside is that I'm not certain that this extruder generates enough torque to overcome slight fluctuations in resistance. When I see thin flow, I can augment feed pressure by manually pushing filament into the extruder, and this often clears onset clogs and restores flow. This tells me that a little bit more torque would help steady flow. If your hotend is healthy then this extruder may work well for you. I'm switching to a dual gear extruder with 3:1 reductions (while also upgrading the hotend to fix other problems). If the geared extruder chews filament then I may switch back to this one. The recommended esteps value 139 steps/mm worked perfectly. I chamfered the filament inlet hole in the main block per other commenter's recommendation to avoid chaffing. Filament loads easily and naturally in this extruder compared to my other one (a cheap BMG dual extruder clone). The clutch lever on this one is awkward to grip. Assembly took a little bit of figuring (instructions are incomplete), but it didn't take long. Feels solid and reliable overall.

## Features

- 【Dual Gear Extrusion Mechanism】:The filament is gripped by the dual drive much more firmly with less deformation, so it doesn't jam as much in the tube, nozzle or hotend.
- 【Upgraded Idler Gear Design】This idler gear is upgraded with two washers on both sides, so the sharp gear will NOT ride against the bottom of the arm or chew it up.
- 【Spring Adjustable Extruder】The extrusion spring tension could be adjusted by tighten the screw,which greatly improves the printing accuracy and feeding issue.
- 【Application】:This all metal dual drive extruder is compatible with Ender 3 V2,Ender 3 Pro,Ender 3,Ender 3 Neo,Ender 3 V2 Neo,Ender 3 Max Neo,Ender 5 Pro,CR10 S series 3D printer.ONLY suit for 3d printers with motor shaft over 20mm,please measure the shaft length before placing the order.
- 【Kindly Reminder】:Please calibrate the E-steps from 100 to 139; Please lubricate the gears before first use;for 3d printers with filament detector,as the height of our dual gear extruder may be different from the original one, please print the model to rise up the filament detector to make them at the same height;for Vyper users,please swap the motor wire sequence to make it turn forward instead of reverse

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09H6T3NNT |
| Best Sellers Rank | #17,130 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #21 in 3D Printer Extruders |
| Date First Available | September 27, 2021 |
| Item Weight | 2.08 ounces |
| Item model number | RDX3D032 |
| Manufacturer | Redrex |
| Product Dimensions | 0.98 x 2.2 x 1.97 inches |

## Images

![Redrex Dual Gear Ender 3 Extruder with Two Washers Metal Drive Feeder Upgrade Kit Compatible with Creality Ender 3 V2 Pro,Ender 3 Neo Series,CR10 3D Printer TPU Filament Supported(Motor Shaft>20mm) - Image 1](https://m.media-amazon.com/images/I/418xc4bn7IL.jpg)
![Redrex Dual Gear Ender 3 Extruder with Two Washers Metal Drive Feeder Upgrade Kit Compatible with Creality Ender 3 V2 Pro,Ender 3 Neo Series,CR10 3D Printer TPU Filament Supported(Motor Shaft>20mm) - Image 2](https://m.media-amazon.com/images/I/41FuIVN1BZL.jpg)
![Redrex Dual Gear Ender 3 Extruder with Two Washers Metal Drive Feeder Upgrade Kit Compatible with Creality Ender 3 V2 Pro,Ender 3 Neo Series,CR10 3D Printer TPU Filament Supported(Motor Shaft>20mm) - Image 3](https://m.media-amazon.com/images/I/51DG-DgQU0L.jpg)
![Redrex Dual Gear Ender 3 Extruder with Two Washers Metal Drive Feeder Upgrade Kit Compatible with Creality Ender 3 V2 Pro,Ender 3 Neo Series,CR10 3D Printer TPU Filament Supported(Motor Shaft>20mm) - Image 4](https://m.media-amazon.com/images/I/51OyivvHC9L.jpg)
![Redrex Dual Gear Ender 3 Extruder with Two Washers Metal Drive Feeder Upgrade Kit Compatible with Creality Ender 3 V2 Pro,Ender 3 Neo Series,CR10 3D Printer TPU Filament Supported(Motor Shaft>20mm) - Image 5](https://m.media-amazon.com/images/I/51iIF7t4LaL.jpg)

## Available Options

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

## Questions & Answers

**Q: I have a cr10s, do i need right hand or left hand??**
A: All the ender 3 and cr10 series need the right version!!

**Q: Will this work with anet a8 plus? and what version would i need to buy?**
A: You're having trouble with YOUR extruder, too, aren't you? We all are. They're terrible.

This will work with your printer if you're fed up with their direct drive and you're converting it to use a Bowden tube. Be aware that Bowden tube extruders come with their  own unique struggles, but they're not as nasty as the A8 Plus's direct drive extruders.

Since you're doing this conversion, you'll also need some sort of 24V Bowden-style hotend.

It mattereth not a whit whether you go with the left-hand or right-hand version for your printer; you'll mount it wherever you figure it'll be convenient. If I were you, I'd mount it somewhere left of center, but your circumstances may be different from mine.

While you're at it, you might as well upgrade your linear bearings to polymer, too, and your control board to one of the many alternatives. Whatever you do, don't screw around; replace that power cable NOW before you burn your printer to a crisp! The one that runs from the power supply to the control board. It isn't big enough for that load, and the crimped terminals sometimes catch fire. Replace it with no less than #16 AWG wire.

**Q: Will this fit a Monoprice Mini v2?**
A: It's designed for the Creality CR-10, but it's a fairly safe bet that it would fit any bowden printer that uses the same size motor for the extruder, and the same size filament (The creality uses a 42-40 stepper motor, but many other stepper motors have the same spacing between screw holes).  Depending on the bracket the motor is attached to, it's possible the screws that come with this part might not be long enough, but replacement screws shouldn't be hard to find.

**Q: Is this all i need to upgrade an ender 3 to have a metal hotend for printing petg?**
A: You don't need an all-metal hotend for petg usually. The one on the ender-3 will work just fine. The limit of a ptfe tube is around 240-250. Petg prints with a hotend at 230-250 usually, just make sure the filament you buy isn't one of the odd ones that might need higher temps. If you're worried replace the ptfe on your ender-3 with high grade stuff like capricorn and look for lower temp petg filaments.

## Customer Reviews

### ⭐⭐⭐⭐⭐ So far so good--try this one first!
*by A***S on September 10, 2022*

Bought this extruder for my 2020 model CR-10 after I had inconsistent extrusion and skipping on my prints from my aluminum single gear extruder and tried everything else I could think of to fix it. A few things off the top of my head: -As other reviews have pointed out, this version of the low-cost dual gear design includes washers to prevent the gears from grinding off the aluminum as they turn--this is the only one I've seen on Amazon that acknowledges that design flaw! -An issue that I HAVEN'T seen in reviews (probably because it's such an obscure upgrade) is that, while it IS compatible with the CR-10, it's not perfectly compatible with the PrinterMods direct drive upgrade right out of the box. This extruder is substantially thicker than the stock Creality one the PrinterMods upgrade is designed for, so the M3x25 screws included with that upgrade are /just/ too short to mount the motor + extruder to the printhead, and the screws you get with this package DEFINITELY aren't long enough to do the job. I'll update this review later to see how it works in action, but PrinterMods users--you WILL need to replace the two M3x25 screws you used to mount the motor to the printhead with M3x35, and I recommend adding a matching nut to ensure you can screw it all the way in. (It's overkill, but I ordered the iexcell M3 screw variety pack with the 50 nuts and five different lengths of screws--it's only ~$9 on Amazon though, so unless you found a cheaper M3x35 nut and bolt pack, that's what I can personally recommend.) -Definitely recalibrate your e-steps after you install this--in my case the included suggestion of 139 steps/mm was spot on, but it doesn't hurt to use this as a starting point for your calibration, since either way you're going to need to bump up your e-steps from stock for this kind of extruder. -If you're confused on how to install this, check out CHEP's video specifically about installing them. The included instructions are pretty vague if you haven't done extruder upgrades before, but I think that video is super easy to follow for beginners. Like I said, so far so good--after calibrating e-steps this extruder consistently extrudes the amount of filament you tell it to, has a firm grip on the filament without grinding it down or biting into it too deeply (at least with PLA--I'll see about PETG and other filaments one of these days), and shows no sign of slippage. Again, since I need to get longer screws to mount it on my particular setup, I'll update this review later to see how it works extruding hot filament proper, but if you need a solid dual gear extruder and don't want to break the bank, get THIS one! UPDATE 9/14/22: So I managed to finally get this thing mounted and tested extruding hot filament and it works beautifully! I won't knock off a star for this, but I WILL note that, for my extruder, I had to chamfer the second hole that fed the filament through the PTFE tubing a bunch since the gears didn't perfectly line up with that hole, making it so not only did I have difficulty feeding filament through, but it shaved off the filament as the extruder worked. This extruder is solid in every other aspect but this one, and while I would still certainly recommend it over other dual gear models on Amazon, I would advise having a needle file on hand just in case your hole(s) are misaligned/undersized. You get what you pay for, as they say. UPDATE: 9/23/22: After some fairly light but solid use, I can safely say that this is very likely your best budget dual gear option on Amazon right now. My only gripe that still remains is that it's finicky to actually get the filament through the gears AND to the hotend, but I imagine that's just because of my own weird setup, and I've heard that people have issues feeding filament through their stock/single-extruder setups anyways. If you're like me and you're patient (and desperate) enough to stick with it once you buy it, I still recommend getting a needle file just in case you need to widen the feed hole--after adding extra clearance it works just fine and no longer shaves away the filament.

### ⭐⭐⭐⭐⭐ low torque is useful!!!
*by A***N on July 18, 2023*

This ungeared (i.e. 1:1 stepper torque) dual extruder yields significantly lower feed pressure compared to the stock extruder from my Anycubic i3 Mega with 3:1 gear reduction, and that may be a good thing. My old stock extruder left a stronger bite in the filament when flowing normally, and severely chewed into the filament during hotend stalls and jams. In contrast, this dual gear extruder leaves a gentler (2-sided) bite during normal flow, and when the hotend slows down, the stepper motor cogs before the filament slips and chaffs. The end result is there's no noticeable chew in the filament after jams. Great! I don't need to trim filament anymore after jams. The downside is that I'm not certain that this extruder generates enough torque to overcome slight fluctuations in resistance. When I see thin flow, I can augment feed pressure by manually pushing filament into the extruder, and this often clears onset clogs and restores flow. This tells me that a little bit more torque would help steady flow. If your hotend is healthy then this extruder may work well for you. I'm switching to a dual gear extruder with 3:1 reductions (while also upgrading the hotend to fix other problems). If the geared extruder chews filament then I may switch back to this one. The recommended esteps value 139 steps/mm worked perfectly. I chamfered the filament inlet hole in the main block per other commenter's recommendation to avoid chaffing. Filament loads easily and naturally in this extruder compared to my other one (a cheap BMG dual extruder clone). The clutch lever on this one is awkward to grip. Assembly took a little bit of figuring (instructions are incomplete), but it didn't take long. Feels solid and reliable overall.

### ⭐⭐⭐⭐ A very necessary upgrade!
*by R***Z on November 28, 2023*

Recently got an Ender 3 V2 neo and was really struggling getting the printer going and having good prints. Adhesion and extrusion problems galore. The extruder on that printer is all metal, which is great, but the design is terrible. I could easily pull the filament out without pushing in the gripper arm, even after adjusting the spring tension. So it had to go. I'm not sure if this is the best replacement, but it works and it's great for the price. I can actually print now! Installation wasn't too tricky, but it is a bit involved. Especially getting the spring on and tensioned correctly. Sometimes the gears on this don't grip right away but it does eventually click and works really well. There is a lot of filament dust that it creates so it wears down the filament more than the default extruder. Not sure if that's an issue but so far so good. When it's time to replace this, I will probably go higher end as it's just too important a part to skimp on. But at least compared to the original part, this is an exceptional and needed upgrade.

## Frequently Bought Together

- Redrex Dual Gear Ender 3 Extruder with Two Washers Metal Drive Feeder Upgrade Kit Compatible with Creality Ender 3 V2 Pro,Ender 3 Neo Series,CR10 3D Printer TPU Filament Supported(Motor Shaft>20mm)
- UniTak3D Ender 3 Direct Drive Upgrade Conversion Bracket for Ender 3 V2,Ender 3 Pro and Voxelab Aquila 3D Printer for B-MG&Dual Gear&Bowden Extruder(NOT for Neo Series,Extruder&Hotend NOT Include)
- Official Creality Ender 3 Dual Z-axis Upgrade Kit with Lead Screw, Stepper Motor and Metal Power Supply Holder, Ender 3 pro upgrades for Ender 3/ Ender 3 Pro/Ender 3 V2

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-08*