---
product_id: 134101803
title: "3Dman GT2 20 Toothless Bore 5mm Aluminum Idler Pulley for 6mm Width Timing Belt 3D Printers (10pcs)"
brand: "3dman"
price: "$41"
currency: NZD
in_stock: true
reviews_count: 10
category: "3 Dman"
url: https://www.desertcart.nz/products/134101803-3dman-gt2-20-toothless-bore-5mm-aluminum-idler-pulley-6mm
store_origin: NZ
region: New Zealand
---

# 5mm precision bore for perfect fit 20 toothless design for smooth belt glide lightweight aluminum alloy, durable & corrosion-resistant 3Dman GT2 20 Toothless Bore 5mm Aluminum Idler Pulley for 6mm Width Timing Belt 3D Printers (10pcs)

**Brand:** 3dman
**Price:** $41
**Availability:** ✅ In Stock

## Summary

> ⚙️ Elevate your 3D printing game with precision and durability!

## Quick Answers

- **What is this?** 3Dman GT2 20 Toothless Bore 5mm Aluminum Idler Pulley for 6mm Width Timing Belt 3D Printers (10pcs) by 3dman
- **How much does it cost?** $41 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/134101803-3dman-gt2-20-toothless-bore-5mm-aluminum-idler-pulley-6mm)

## Best For

- 3dman enthusiasts

## Why This Product

- Trusted 3dman brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Crafted from premium aluminum alloy for lightweight strength and long-lasting corrosion resistance.
- • **Bulk Pack Advantage:** 10-piece set keeps your projects running smoothly without frequent replacements.
- • **Precision Fit Guaranteed:** 5mm bore diameter engineered for exact alignment with GT2 6mm belts—no slip, no fuss.
- • **Seamless Belt Performance:** Toothless 20-tooth design ensures whisper-quiet, frictionless timing belt movement.
- • **Versatile Industrial Compatibility:** Ideal for 3D printers, CNC machines, milling, drilling, and other mechanical transmissions.

## Overview

The 3Dman GT2 20 Toothless Bore 5mm Aluminum Idler Pulley is a high-quality, lightweight aluminum component designed for GT2 6mm wide timing belts. Its 20 toothless design ensures smooth, quiet belt operation, while the precise 5mm bore guarantees a perfect fit. Widely compatible with 3D printers and various CNC and mechanical machines, this 10-piece set offers reliable performance and durability for professional-grade projects.

## Description

Specification: Toothless Number:20 Bore Diameter: 5mm Net Weight: 3g/pcs Material: Aluminum Package Included: GT2 20Toothless Timing Belt Pulley Bore 5mm * 10

Review: Does the job - A couple of the bearing are a bit notchy, but that's not going to cause a problem for this application
Review: Ok, but some with bad bearings. - I use these on 3d printersz and they're great for Gates GT2 6mm belts. A few of these came with dry, or rough bearings which was a pity. Otherwise they were decent quality, and the belt surface and aluminium outers were good.

## Features

- Used for GT2 6mm Wide Timing Belt.
- 20 Toothless timing belt idler pulley, bore 5mm.
- Material:Aluminium alloy.
- Widely used in 3D printer, CNC, milling machine, gear forming machine, drilling machine, CNC machine tool lathe, hobbing machine or other mechanical transmission occasions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07RV2T54M |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 46,728 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 24 in 3D Printer Timing Belts |
| Colour | 20Toothless 5mm Bore |
| Customer Reviews | 4.4 4.4 out of 5 stars (369) |
| Date First Available | 14 May 2019 |
| Item Weight | 40 g |
| Manufacturer | 3Dman |
| Manufacturer reference | 20-05-0514-10 |
| Material | aluminum |
| Measurement System | Metric |
| Package Dimensions | 11.5 x 8.7 x 0.9 cm; 40 g |
| Part number | 20-05-0514-10 |
| Size | 20 Toothless Bore 5mm |

## Images

![3Dman GT2 20 Toothless Bore 5mm Aluminum Idler Pulley for 6mm Width Timing Belt 3D Printers (10pcs) - Image 1](https://m.media-amazon.com/images/I/513l8BxCfQL.jpg)
![3Dman GT2 20 Toothless Bore 5mm Aluminum Idler Pulley for 6mm Width Timing Belt 3D Printers (10pcs) - Image 2](https://m.media-amazon.com/images/I/51bEipJawKL.jpg)
![3Dman GT2 20 Toothless Bore 5mm Aluminum Idler Pulley for 6mm Width Timing Belt 3D Printers (10pcs) - Image 3](https://m.media-amazon.com/images/I/51S8gN4MhVL.jpg)
![3Dman GT2 20 Toothless Bore 5mm Aluminum Idler Pulley for 6mm Width Timing Belt 3D Printers (10pcs) - Image 4](https://m.media-amazon.com/images/I/51aQViXYZOL.jpg)
![3Dman GT2 20 Toothless Bore 5mm Aluminum Idler Pulley for 6mm Width Timing Belt 3D Printers (10pcs) - Image 5](https://m.media-amazon.com/images/I/61NsrpCNXoL.jpg)

## Available Options

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

## Questions & Answers

**Q: What's the difference between the seventh and ninth choices in this listing?**
A: The seventh is - 40 teeth/8mm bore, the ninth 60 teeth/8mm bore. The 60 teeth is bigger diameter than 40 teeth.

**Q: What is the inside bore size of the idler pulley?**
A: The drawing shows 5mm

**Q: Can I use this for a Velec electric bike chain?**
A: This is a Timing Belt Idler Pulley made from Aluminum. I did not use it on my project, but used pair of flanged ball bearings for the pulley I need. If your bike chain made from steel metal I wouldn't recommended to use as a pulley for it. Aluminum will be worn out very quick.

**Q: What is the flange diameter on these?**
A: Flange diameter is 0.704"
Flange thickness is 0.039"
Belt Hub diameter is 0.473"
Belt Hub width is 0.255"

## Customer Reviews

### ⭐⭐⭐⭐ Does the job
*by K***R on 8 November 2020*

A couple of the bearing are a bit notchy, but that's not going to cause a problem for this application

### ⭐⭐⭐ Ok, but some with bad bearings.
*by C***P on 15 July 2020*

I use these on 3d printersz and they're great for Gates GT2 6mm belts. A few of these came with dry, or rough bearings which was a pity. Otherwise they were decent quality, and the belt surface and aluminium outers were good.

### ⭐⭐⭐ A few crunch bearings
*by A***Y on 21 June 2020*

3 of them had crunchy bearings in them. The rest were OK. We shall see how long they last.

## Frequently Bought Together

- 3Dman GT2 20 Toothless Bore 5mm Aluminum Timing Belt Idler Pulley for 6mm Width 3D Printers (10pcs)
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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-12*