---
product_id: 263671848
title: "WMYCONGCONG WGCD 2 PCS T8 Anti Backlash Spring Loaded Nut Elimination Gap Nut + 2 PCS Flexible Couplings 5mm to 8mm Stepper Motor Coupler for RepRap 3D Printer CNC Machine"
brand: "wmycongcong"
price: "Bs.924"
currency: BOB
in_stock: false
reviews_count: 5
category: "Wmycongcong"
url: https://www.desertcart.bo/products/263671848-wmycongcong-wgcd-2-pcs-t8-anti-backlash-spring-loaded-nut
store_origin: BO
region: Bolivia
---

# Flexible 5mm to 8mm coupler Precision anti-backlash nut Durable aluminum & brass build WMYCONGCONG WGCD 2 PCS T8 Anti Backlash Spring Loaded Nut Elimination Gap Nut + 2 PCS Flexible Couplings 5mm to 8mm Stepper Motor Coupler for RepRap 3D Printer CNC Machine

**Brand:** wmycongcong
**Price:** Bs.924
**Availability:** ❌ Out of Stock

## Summary

> ⚙️ Upgrade your 3D printer’s precision — don’t let backlash hold you back!

## Quick Answers

- **What is this?** WMYCONGCONG WGCD 2 PCS T8 Anti Backlash Spring Loaded Nut Elimination Gap Nut + 2 PCS Flexible Couplings 5mm to 8mm Stepper Motor Coupler for RepRap 3D Printer CNC Machine by wmycongcong
- **How much does it cost?** Bs.924 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.bo](https://www.desertcart.bo/products/263671848-wmycongcong-wgcd-2-pcs-t8-anti-backlash-spring-loaded-nut)

## Best For

- wmycongcong enthusiasts

## Why This Product

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

## Key Features

- • **Robust Build Quality:** High-grade aluminum and brass ensure long-lasting durability
- • **Effortless Installation:** Designed for quick upgrades on Ender 3 Pro and similar printers
- • **Upgrade Your 3D Printing Game:** Reduce mechanical play and improve print accuracy with ease
- • **Universal Fit for RepRap & CNC:** Couplers adapt 5mm to 8mm shafts, perfect for NEMA 17 motors
- • **Zero Backlash, Maximum Precision:** Spring-loaded nut eliminates gap for flawless Z-axis motion

## Overview

The WMYCONGCONG WGCD kit includes 2 high-precision T8 anti-backlash nuts and 2 flexible aluminum couplers (5mm to 8mm) designed for RepRap 3D printers and small CNC machines. Its spring-loaded design eliminates mechanical play on the Z-axis, enhancing print accuracy and smoothness. Compatible with NEMA 17 stepper motors, this durable aluminum and brass combo offers an easy installation to upgrade your printer’s performance and reliability.

## Description

Specification: T8 Anti Bachlash Nut: Suitable for 3D printer T8 lead screw Lead screw diameter: 8mm Pitch: 2mm Size: 45 x 22 x 13.5mm/1.77 x 0.86 x 0.53inch Special anti backlash nut, high precision, low cost for DIY engraving machine, 3D printer. Couplings 5mm to 8mm: Size: 5mm to 8mm Material: Aluminum Dimensions: 19mm x 25mm/0.75 x 0.98inch(D x H) Quantity: 2pcs Compatible with NEMA 17 stepper motors (for 5mm shaft diameter). Great accessories for RepRap 3D Printers and small CNC machines. Package Content: 2 x T8 Anti Bachlash Nut 2 x Shaft Coupler 5mm to 8mm.

Review: These are 4 start anti-backlash nuts though I couldn't see this in the description. They don't fit Ender 5 pro, new version, which has 2 start lead screws, and probably don't fit others. Please check before ordering
Review: Installed really well on and Ender 3 Pro. I've noticed after modifying just about every system on the printer that as my tolerances become tighter and tighter, general shortcomings in the design start to become apparent. I'm not saying the Ender 3 Pro isn't a great printer at a fantastic price - it most definitely is! It is the definition of a truly extensible platform with unlimited possibilities. My modifications or "upgrades" are too numerous to list ad nauseum, but I have begun to see Z hops showing slightly uneven setdowns. This is due to not only play in the stock brass nut that attaches to the z rail, but general backlash by definition. The spring keeps constant tension between both parts of the anti-backlash nuts and the locking tongue and groove disallow either from turning in reference to each other. The slight gap allows the transmission of force applied in the opposite direction, which causes backlash, to the spring which compresses and decompresses thusly negating that force on the z axis and all the things attached to it. Viola... Problem solved. I ended up needing to put one set of m5 washers between the stepper's plastic attachment block and the frame to correctly line up the leadscrew with the center of the hole in the z axis plate. Doing this happened to align dead center. Two of the four mounting holes in the top half of the part lined up well with the existing holes on the z axis plate. Easy installation and very pleased with the results. If something should go awry in the future, I will update this review as I always do. Would recommend and would buy again. I haven't tried the couplers yet, although I'm maybe not the biggest fan of the set screw design... But I bought this set for the two anti-backlash nuts and the couplers will go in one of my parts boxes for another day.

## Features

- Flexible coupler, removes stress between motor and driving component; 5mm to 8mm, great for RepRap 3D Printers and small CNC machines.
- Coupler Dimensions: 19mm x 25mm/0.75 x 0.98inch(D x H)
- High quality anti-backlash nut, high precision, suitable for 3D printer T8 lead screw.
- Pitch: 2mm; Lead: 8mm.
- Package Content: 2 x Shaft Coupler 5mm to 8mm + 2 x Anti-Backlash Nut.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07FC84D63 |
| ASIN  | B07FC84D63 |
| Batteries Included? | No |
| Batteries Required? | No |
| Customer Reviews | 4.2 4.2 out of 5 stars (63) |
| Customer reviews | 4.2 4.2 out of 5 stars (63) |
| Date First Available | 3 November 2018 |
| Date First Available  | 3 November 2018 |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 74 g |
| Item model number | WGCD 185 |
| Item model number  | WGCD 185 |
| Manufacturer | WGCD |
| Manufacturer  | WGCD |
| Material | Aluminum, Brass |
| Number Of Pieces | 4 |
| Package Dimensions | 14 x 11.5 x 2 cm; 74 g |
| Package Dimensions  | 14 x 11.5 x 2 cm; 74 g |
| Part number | WGCD 185 |

## Product Details

- **Brand:** WMYCONGCONG
- **Exterior finish:** Black
- **Item weight:** 0.07 Kilograms
- **Material:** Aluminum, Brass
- **Metal type:** Aluminum

## Images

![WMYCONGCONG WGCD 2 PCS T8 Anti Backlash Spring Loaded Nut Elimination Gap Nut + 2 PCS Flexible Couplings 5mm to 8mm Stepper Motor Coupler for RepRap 3D Printer CNC Machine - Image 1](https://m.media-amazon.com/images/I/51ZjErDggBL.jpg)
![WMYCONGCONG WGCD 2 PCS T8 Anti Backlash Spring Loaded Nut Elimination Gap Nut + 2 PCS Flexible Couplings 5mm to 8mm Stepper Motor Coupler for RepRap 3D Printer CNC Machine - Image 2](https://m.media-amazon.com/images/I/51iZ-d+yM7L.jpg)
![WMYCONGCONG WGCD 2 PCS T8 Anti Backlash Spring Loaded Nut Elimination Gap Nut + 2 PCS Flexible Couplings 5mm to 8mm Stepper Motor Coupler for RepRap 3D Printer CNC Machine - Image 3](https://m.media-amazon.com/images/I/51u1BSC6ZHL.jpg)
![WMYCONGCONG WGCD 2 PCS T8 Anti Backlash Spring Loaded Nut Elimination Gap Nut + 2 PCS Flexible Couplings 5mm to 8mm Stepper Motor Coupler for RepRap 3D Printer CNC Machine - Image 4](https://m.media-amazon.com/images/I/61l1qwBRV+L.jpg)
![WMYCONGCONG WGCD 2 PCS T8 Anti Backlash Spring Loaded Nut Elimination Gap Nut + 2 PCS Flexible Couplings 5mm to 8mm Stepper Motor Coupler for RepRap 3D Printer CNC Machine - Image 5](https://m.media-amazon.com/images/I/61sJ0MdJpYL.jpg)

## Questions & Answers

**Q: How many starts in the nut threaded for , 1 start , 4 starts ?**
A: 4 starts.

**Q: Will this work on the cr10s pro?**
A: yes

**Q: How many starts is the nut threaded for ?**
A: 4 starts

**Q: Will this work on the cr10s pro?**
A: yes

## Customer Reviews

### ⭐⭐⭐ Review
*by S***O on 21 October 2023*

These are 4 start anti-backlash nuts though I couldn't see this in the description. They don't fit Ender 5 pro, new version, which has 2 start lead screws, and probably don't fit others. Please check before ordering

### ⭐⭐⭐⭐⭐ Review
*by A***X on 22 May 2020*

Installed really well on and Ender 3 Pro. I've noticed after modifying just about every system on the printer that as my tolerances become tighter and tighter, general shortcomings in the design start to become apparent. I'm not saying the Ender 3 Pro isn't a great printer at a fantastic price - it most definitely is! It is the definition of a truly extensible platform with unlimited possibilities. My modifications or "upgrades" are too numerous to list ad nauseum, but I have begun to see Z hops showing slightly uneven setdowns. This is due to not only play in the stock brass nut that attaches to the z rail, but general backlash by definition. The spring keeps constant tension between both parts of the anti-backlash nuts and the locking tongue and groove disallow either from turning in reference to each other. The slight gap allows the transmission of force applied in the opposite direction, which causes backlash, to the spring which compresses and decompresses thusly negating that force on the z axis and all the things attached to it. Viola... Problem solved. I ended up needing to put one set of m5 washers between the stepper's plastic attachment block and the frame to correctly line up the leadscrew with the center of the hole in the z axis plate. Doing this happened to align dead center. Two of the four mounting holes in the top half of the part lined up well with the existing holes on the z axis plate. Easy installation and very pleased with the results. If something should go awry in the future, I will update this review as I always do. Would recommend and would buy again. I haven't tried the couplers yet, although I'm maybe not the biggest fan of the set screw design... But I bought this set for the two anti-backlash nuts and the couplers will go in one of my parts boxes for another day.

### ⭐⭐⭐⭐⭐ Review
*by A***S on 21 June 2025*

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*Product available on Desertcart Bolivia*
*Store origin: BO*
*Last updated: 2026-03-04*