--- product_id: 134101803 title: "3Dman GT2 20 Toothless Bore 5mm Aluminum Idler Pulley for 6mm Width Timing Belt 3D Printers (10pcs)" brand: "3dman" price: "€ 23.23" currency: EUR in_stock: true reviews_count: 10 category: "3 Dman" url: https://www.desertcart.hr/products/134101803-3dman-gt2-20-toothless-bore-5mm-aluminum-idler-pulley-6mm store_origin: HR region: Croatia --- # 5mm precision bore for perfect fit 20 toothless design for smooth belt glide Durable lightweight aluminum alloy 3Dman GT2 20 Toothless Bore 5mm Aluminum Idler Pulley for 6mm Width Timing Belt 3D Printers (10pcs) **Brand:** 3dman **Price:** € 23.23 **Availability:** ✅ In Stock ## Summary > ⚙️ Elevate your 3D printing game with precision and style! ## 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?** € 23.23 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/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 - • **Bulk Pack Advantage:** 10-piece set to keep your projects running smoothly and your spares ready—never miss a beat. - • **Lightweight Yet Robust:** Crafted from premium aluminum alloy for durability without added bulk. - • **Precision Fit Guaranteed:** 5mm bore diameter engineered for exact alignment with GT2 6mm width timing belts. - • **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 more—upgrade your mechanical transmission effortlessly. ## Overview The 3Dman GT2 20 Toothless Bore 5mm Aluminum Idler Pulley is a high-quality, lightweight aluminum pulley designed specifically for GT2 6mm wide timing belts. Its toothless 20-tooth design ensures smooth, quiet 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 | 72,713 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 29 in 3D Printer Timing Belts | | Colour | 20Toothless 5mm Bore | | Customer Reviews | 4.4 4.4 out of 5 stars (380) | | 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) ## 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) - WINSINN GT2 Timing Belt Pulley 20 Teeth, 5mm Bore, for 6mm Width Belt - Ideal for 3D Printers, CNC Machines, Robotics (5-Pack) - 3D Printing GT2 Timing Belt, Zeelo 10 Meters (32.8ft) GT2 Open Timing Belt 2mm Pitch 6mm Width Rubber Fiberglass Fit for RepRap Prusa Mendel Rostock CR-10 Ender 3 3D Printers - Black --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/134101803-3dman-gt2-20-toothless-bore-5mm-aluminum-idler-pulley-6mm](https://www.desertcart.hr/products/134101803-3dman-gt2-20-toothless-bore-5mm-aluminum-idler-pulley-6mm) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-06-23*