---
product_id: 53777721
title: "4 Pcs Solid Polymer LM12UU Bearing 12mm Shaft - Igus Drylin RJ4JP-01-12 for 3D Printer"
brand: "hmmbw"
price: "$65.11"
currency: USD
in_stock: true
reviews_count: 4
url: https://www.desertcart.ec/products/53777721-4-pcs-solid-polymer-lm12uu-bearing-12mm-shaft-igus-drylin
store_origin: EC
region: Ecuador
---

# 30mm Length 12mm ID 21mm OD 4 Pcs Solid Polymer LM12UU Bearing 12mm Shaft - Igus Drylin RJ4JP-01-12 for 3D Printer

**Brand:** hmmbw
**Price:** $65.11
**Availability:** ✅ In Stock

## Summary

> 🔧 Upgrade Your 3D Printing Game!

## Quick Answers

- **What is this?** 4 Pcs Solid Polymer LM12UU Bearing 12mm Shaft - Igus Drylin RJ4JP-01-12 for 3D Printer by hmmbw
- **How much does it cost?** $65.11 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/53777721-4-pcs-solid-polymer-lm12uu-bearing-12mm-shaft-igus-drylin)

## Best For

- hmmbw enthusiasts

## Why This Product

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

## Key Features

- • **Perfect Fit:** Designed to replace standard LM12UU bearings in your 3D printer.
- • **Durable Design:** Built to withstand the rigors of continuous use without maintenance.
- • **Smooth Operation:** Experience frictionless movement with self-lubricating technology.
- • **Hassle-Free Maintenance:** Say goodbye to grease and oil—just install and go!
- • **Versatile Compatibility:** Ideal for various 3D printer models and applications.

## Overview

The 4 Pcs Solid Polymer LM12UU Bearing is engineered for 3D printers, featuring a 12mm inner diameter, 21mm outer diameter, and 30mm length. These self-lubricating bearings eliminate the need for grease, ensuring smooth and maintenance-free operation.

## Description

4 Pcs Solid Polymer LM12UU Bearing 12mm Shaft - Igus Drylin RJ4JP-01-12 for 3D Printer

## Features

- 12mm Inner diameter.     21mm Outer diameter.     30mm Length.     Replace LM12UU metal linear bearings commonly used in many 3D Printers     These bearings do not need any lube or grease, they are self lubricating.

## Images

![4 Pcs Solid Polymer LM12UU Bearing 12mm Shaft - Igus Drylin RJ4JP-01-12 for 3D Printer - Image 1](https://m.media-amazon.com/images/I/81VVRdJhdaL.jpg)
![4 Pcs Solid Polymer LM12UU Bearing 12mm Shaft - Igus Drylin RJ4JP-01-12 for 3D Printer - Image 2](https://m.media-amazon.com/images/I/81lEYQ++tVL.jpg)
![4 Pcs Solid Polymer LM12UU Bearing 12mm Shaft - Igus Drylin RJ4JP-01-12 for 3D Printer - Image 3](https://m.media-amazon.com/images/I/618LiRT1iHL.jpg)

## Customer Reviews

### ⭐⭐⭐ 







  
  
    Not sure if they are original or fake. Binds like crazy.
  

*by R***M on Reviewed in the United States on November 25, 2020*

I used this for  Z axis of my CoreXY 3d printer (custom built).I have made sure the linear rods are perfectly parallel. These bearings move fine before I install the print bed with heater, glass plate etc.,  Once there is cantilevered load on it, it does not slide smoothly. Binds like crazy.  I do understand these are supposed to be "self-lubricating" meaning, they slide without needing oil or grease. But, not so in my case. I removed them and installed several times and made sure rods are parallel etc., disappointed.If anyone is looking at these for z axis, I recommend long, one piece linear bearings (LM12LUU) with a flange like those used in a Creality Ender or Sainsmart printers.

### ⭐⭐⭐⭐⭐ 







  
  
    Great bushings
  

*by M***. on Reviewed in the United States on December 21, 2019*

These do a great job. Slide smooth, little to no play.  12mm ends up being a great deal stiffer than the “standard” 8mm for printers

### ⭐⭐⭐⭐⭐ 







  
  
    Shipped quickly, just what I needed
  

*by M***H on Reviewed in the United States on August 13, 2019*

These will get my Taz 6 back to original condition.

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**Shop now:** [https://www.desertcart.ec/products/53777721-4-pcs-solid-polymer-lm12uu-bearing-12mm-shaft-igus-drylin](https://www.desertcart.ec/products/53777721-4-pcs-solid-polymer-lm12uu-bearing-12mm-shaft-igus-drylin)

---

*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-01-24*