---
product_id: 53777721
title: "4 Pcs Solid Polymer LM12UU Bearing 12mm Shaft - Igus Drylin RJ4JP-01-12 for 3D Printer"
brand: "hmmbw"
price: "€ 29.30"
currency: EUR
in_stock: true
category: "Hmmbw"
url: https://www.desertcart.pt/products/53777721-4-pcs-solid-polymer-lm12uu-bearing-12mm-shaft-igus-drylin
store_origin: PT
region: Portugal
---

# 12mm inner diameter precision fit Direct LM12UU metal bearing replacement Self-lubricating solid polymer tech 4 Pcs Solid Polymer LM12UU Bearing 12mm Shaft - Igus Drylin RJ4JP-01-12 for 3D Printer

**Brand:** hmmbw
**Price:** € 29.30
**Availability:** ✅ In Stock

## Summary

> ⚙️ Upgrade your 3D printer with silent, slick polymer precision!

## 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?** € 29.30 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/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

- • **Durable Polymer Build:** Robust solid polymer construction offers long-lasting wear resistance and quieter operation than metal bearings.
- • **Plug-and-Play Upgrade:** Direct replacement for standard LM12UU metal bearings—upgrade your 3D printer effortlessly.
- • **Trusted German Engineering:** Manufactured in Germany with a 4.7-star rating, combining quality and reliability for your projects.
- • **Maintenance-Free Performance:** Self-lubricating solid polymer design eliminates the need for grease or oil, saving time and hassle.
- • **Precision Fit for Seamless Motion:** 12mm inner diameter ensures perfect shaft compatibility for smooth 3D printer operation.

## Overview

This 4-piece set of LM12UU solid polymer linear bearings features a 12mm inner diameter and 21mm outer diameter, designed as a direct, maintenance-free replacement for metal bearings in 3D printers. Manufactured in Germany, these self-lubricating bearings deliver quieter, smoother motion without the need for grease, enhancing printer performance and longevity.

## Description

High Quality RJ4JP-01-12 Sold polymer Linear bearing a direct replacement for the metal LM12UU bearing commonly used in many 3D Printers.

## 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B074CCXZ4S |
| Bearing Type | Linear |
| Best Sellers Rank | #275,339 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #4,705 in 3D Printer Accessories |
| Brand Name | HMMBW |
| Compatible Lubricant | None (self-lubricating) |
| Customer Reviews | 4.7 4.7 out of 5 stars (19) |
| Manufacturer | Germany |
| Material Type | Solid Polymer |
| Number of Items | 4 |
| Outside Diameter | 21 millimeters |
| Part Number | LM12UU |
| UPC | 747880085344 |

## Product Details

- **Bearing Type:** Linear
- **Brand:** HMMBW
- **Compatible Lubricant:** None (self-lubricating)
- **Material:** Solid Polymer
- **Outside Diameter:** 21 millimeters

## 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)

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

---

*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-10-24*