---
product_id: 77801435
title: "U type groove pulley"
brand: "lyjee"
price: "AR$51644"
currency: ARS
in_stock: null
reviews_count: 8
url: https://www.desertcart.com.ar/products/77801435-u-type-groove-pulley
store_origin: AR
region: Argentina
---

# 167kg max load-bearing power Smooth 608ZZ ball bearing roll 8mm inner diameter precision fit U type groove pulley

**Brand:** lyjee
**Price:** AR$51644
**Availability:** ❌ Out of Stock

## Summary

> 🛠️ Elevate your mechanics with precision and power — don’t get left behind!

## Quick Answers

- **What is this?** U type groove pulley by lyjee
- **How much does it cost?** AR$51644 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/77801435-u-type-groove-pulley)

## Best For

- lyjee enthusiasts

## Why This Product

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

## Key Features

- • **Heavy-Duty Load Capacity:** Supports up to 167kg (368lbs) — built to handle your toughest projects with ease.
- • **Precision U-Groove Design:** Engineered for seamless tracking and perfect alignment in mechanical systems.
- • **Silent & Smooth Operation:** High-quality nylon and ball bearings ensure whisper-quiet, friction-optimized performance.
- • **Durable High Carbon Steel Core:** Combines strength and longevity to keep your equipment running reliably over time.
- • **Versatile Industrial & Home Use:** Ideal for doors, windows, dollies, and custom mechanical drives — upgrade your setup effortlessly.

## Overview

The Letool 4pcs U Type Groove Pulley set features 8x40x20mm nylon rollers with 608ZZ ball bearings, designed for smooth, silent operation and a robust 167kg load capacity. Perfect for driving mechanical equipment or upgrading door and window tracks, these durable pulleys combine high carbon steel strength with versatile industrial-grade performance.

## Description

Letool 4pcs U Type Groove Pulley Nylon Guide Pulley Rolling Bearing U Groove Roller Wheel 8x40x20mm for Driving Mechanical Equipment, or Used in Doors and Windows: desertcart.com: Tools & Home Improvement

Review: very sturdy, works well - These use standard 608 skate bearing and are rated for a lot of load. The bearing is not as frictionless as a fidget spinner, but it turns as easily as a skateboard or roller blade wheel does. I used these as support and guide rollers for a travelling rope system, like a scaled-down chairlift. I also looked at some larger diameter white pulleys, but those had a deeper grove with vertical sides, which prevents the rope hanger arm from passing through both vertical support pulleys and the horizontal main drive and idler wheels while keeping the same angle where the arm clamps on the rope.
Review: Heavy duty. - Used for barn doors. Work great.

## Features

- Letool 4pcs U type groove pulley nylon Guide Pulley Rolling Bearing U Groove Roller Wheel 8x40x20mm for Driving Mechanical Equipment, or Used in Doors and Windows
- 【U-GROOVE SIZE】Inner Diameter: 8mm/0.3in, Outer Diameter: 40mm/1.6in, Thickness: 20.7mm/0.8in.
- 【OPERATION ADVANTAGES】: Stable and smooth operation, good mute effect, practical and durable.
- 【WIDELY USED】Widely used in doors and windows to track and drive mechanical equipments. These gadgets can be used to build the track system or replace the wheels on the dolly.
- 【Max Load-bearing】: the wheels are very strong and the bearing capacity is stronger.Max Load-bearing is 167kg/368lbs

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01M9G96S6 |
| Bearing Number | 608ZZ |
| Bearing Type | Ball Bearing |
| Brand | LYJEE |
| Compatible Lubricant | Grease |
| Date First Available | October 27, 2016 |
| Is Discontinued By Manufacturer | No |
| Item Thickness | 20.5 Millimeters |
| Item Weight | 0.928 ounces |
| Item model number | U0840-20 |
| Manufacturer | Letool International Ltd. |
| Material | High Carbon Steel |
| Outside Diameter | 40 Millimeters |
| Package Dimensions | 3.03 x 1.81 x 1.69 inches |

## Product Details

- **Bearing Number:** 608ZZ
- **Brand:** LYJEE
- **Item Thickness:** 20.5 Millimeters
- **Item Weight:** 26.3 Grams
- **Material:** High Carbon Steel

## Images

![U type groove pulley - Image 1](https://m.media-amazon.com/images/I/41H2rMZFtHL.jpg)
![U type groove pulley - Image 2](https://m.media-amazon.com/images/I/41M0ejEnzNS.jpg)
![U type groove pulley - Image 3](https://m.media-amazon.com/images/I/41OqBSAaj8S.jpg)
![U type groove pulley - Image 4](https://m.media-amazon.com/images/I/41aFyPMnOgS.jpg)
![U type groove pulley - Image 5](https://m.media-amazon.com/images/I/41pjgMDt6TS.jpg)

## Questions & Answers

**Q: Wanting to use for a children's sensory board.  Would these work for wheels like for a car...etc. What kind of hardware to connect on board?**
A: These are concave so more of a pulley than a car wheel.  You would use ordinary 1/4 bolts to fasten.  They are good quality and run very smoothly.

**Q: Does anyone know the id of the black part? or in other words the od of the bearing? i am trying to find a spacer that will fit inside. thanks.**
A: OD that is visible is 20mm ( 13/32" ). The rest of the race is embedded in the plastic. There is not enough outer race visible to put a spacer against it. I I used nylon spacers of 12mm ( 1/2" ) in diameter mated to the inner race on both sides of the bearing. A machine bolt fits nicely into the hole of the nylon spacer to mount it to whater you like.

**Q: What load can these handle?**
A: I do not know. They are very hefty.

**Q: What's the inner diameter of the wheel where bearing sits**
A: I don't have one to measure and the information in the Amazon listing only shows the inner diameter of the bearing, not the rubber groove. I suggest you contact the vendor through the Amazon link

## Customer Reviews

### ⭐⭐⭐⭐⭐ very sturdy, works well
*by A***R on October 23, 2019*

These use standard 608 skate bearing and are rated for a lot of load. The bearing is not as frictionless as a fidget spinner, but it turns as easily as a skateboard or roller blade wheel does. I used these as support and guide rollers for a travelling rope system, like a scaled-down chairlift. I also looked at some larger diameter white pulleys, but those had a deeper grove with vertical sides, which prevents the rope hanger arm from passing through both vertical support pulleys and the horizontal main drive and idler wheels while keeping the same angle where the arm clamps on the rope.

### ⭐⭐⭐⭐⭐ Heavy duty.
*by L***S on June 3, 2025*

Used for barn doors. Work great.

### ⭐⭐⭐⭐ good fit but small bearing
*by W***S on December 10, 2019*

these exactly fit high pressure (heavy duty hydraulic) 1/2 inch pipe, which has thicker walls than ordinary water pipe, and slightly smaller diameter. A heavier bearing would be nice maybe.

## Frequently Bought Together

- Letool 4pcs U Type Groove Pulley Nylon Guide Pulley Rolling Bearing U Groove Roller Wheel 8x40x20mm for Driving Mechanical Equipment, or Used in Doors and Windows
- CNBTR 4Pieces 6x30x13mm Plastic Coated Sealed Bearings Steel 606ZZ Deep U Groove Guide Pulley Rail Ball Rolling Bearing Wheel Orange
- 5Pcs Deep T Groove Flat Bottom Bearing, Stainless Steel Pulley Wheel for Wire Rope

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**Shop now:** [https://www.desertcart.com.ar/products/77801435-u-type-groove-pulley](https://www.desertcart.com.ar/products/77801435-u-type-groove-pulley)

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*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-02-13*