--- product_id: 332344521 title: "3Dman GT2 16Toothless Bore 3mm 20Toothless Bore 5mm Aluminum Timing Belt Idler Pulley/Double Head for 3D Printer 6mm Width Timing Belt 20 Toothless Bore 5mm 20-05-0514-10" brand: "3dman" price: "€ 39.61" currency: EUR in_stock: true reviews_count: 5 category: "3 Dman" url: https://www.desertcart.hr/products/332344521-3dman-gt2-16toothless-bore-3mm-20toothless-bore-5mm-aluminum-timing store_origin: HR region: Croatia --- # 5mm bore diameter for precise fit 20 toothless design for smooth belt glide Lightweight 3g aluminum build 3Dman GT2 16Toothless Bore 3mm 20Toothless Bore 5mm Aluminum Timing Belt Idler Pulley/Double Head for 3D Printer 6mm Width Timing Belt 20 Toothless Bore 5mm 20-05-0514-10 **Brand:** 3dman **Price:** € 39.61 **Availability:** ✅ In Stock ## Summary > ⚙️ Upgrade your 3D printer’s heartbeat with flawless belt motion! ## Quick Answers - **What is this?** 3Dman GT2 16Toothless Bore 3mm 20Toothless Bore 5mm Aluminum Timing Belt Idler Pulley/Double Head for 3D Printer 6mm Width Timing Belt 20 Toothless Bore 5mm 20-05-0514-10 by 3dman - **How much does it cost?** € 39.61 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/332344521-3dman-gt2-16toothless-bore-3mm-20toothless-bore-5mm-aluminum-timing) ## 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 - • **Durable Yet Lightweight:** Crafted from premium aluminum weighing only 3 grams, balancing strength with minimal added weight. - • **Precision Fit Guaranteed:** 5mm bore diameter engineered for a snug, wobble-free installation on GT2 6mm timing belts. - • **Seamless Belt Performance:** Toothless 20-tooth design eliminates layer shifts and ensures ultra-smooth 3D printing results. - • **Trusted Quality & Support:** Backed by 3Dman’s responsive customer service and hassle-free replacement or refund policy. - • **Versatile Industrial Compatibility:** Perfect for CNC machines, milling, drilling, and 3D printers—upgrade your workflow effortlessly. ## Overview The 3Dman GT2 20 Toothless Bore 5mm Aluminum Timing Belt Idler Pulley is a precision-engineered, lightweight aluminum component designed for GT2 6mm wide timing belts. Its toothless design ensures smooth, jitter-free belt movement, ideal for 3D printers and various CNC machinery. With a 5mm bore for exact fit and a durable build, it enhances print quality and machine reliability, supported by a trusted brand with excellent customer service. ## Description Specification: Toothless Number:20 Bore Diameter: 5mm Net Weight: 3g/pcs Material: Aluminum Package Included: GT2 20Toothless Timing Belt Pulley Bore 5mm * 10 Thanks for you to choose us, and we will not let you down. 3Dman are devoted to offer premium quality products to all cherished customers.If our environment- friendly parcel has any problem, just let us know, please feel free to contact us via email. We will respond to you within 24 hours. We will take full responsibility for the quality-related issue through REPLACEMENT or FULL REFUND. Meanwhile, we will keep following up until it is resolved. Review: A couple of the bearing are a bit notchy, but that's not going to cause a problem for this application Review: Upgraded my Ender 3 with these pulleys. The belt tensioners came with toothed pulleys which were a constant problem (layer shifts). The prints with these are absolutely smooth and works great. A highly recommended upgrade that's even cheap. ## Features - Used for GT2 6mm Wide Timing Belt. - 20 Toothless timing belt idler pulley, bore 5mm. - Widely used in milling machine, gear shaper, drilling machine, CNC engine lathe, hobbing machine or other machinery transmission. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07RV2T54M | | ASIN | B07RV2T54M | | Batteries Included? | No | | Batteries Required? | No | | Color | 20 Toothless Bore 5mm | | Customer Reviews | 4.5 4.5 out of 5 stars (212) | | Customer reviews | 4.5 4.5 out of 5 stars (212) | | Date First Available | 11 June 2019 | | Date First Available | 11 June 2019 | | Item Weight | 40 g | | Manufacturer | 3Dman | | Manufacturer | 3Dman | | Manufacturer reference | 20-05-0514-10 | | Manufacturer reference | 20-05-0514-10 | | Material | Aluminum | | Measurement System | Metric | | Package Dimensions | 11.5 x 8.7 x 0.9 cm; 40 g | | 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 16Toothless Bore 3mm 20Toothless Bore 5mm Aluminum Timing Belt Idler Pulley/Double Head for 3D Printer 6mm Width Timing Belt 20 Toothless Bore 5mm 20-05-0514-10 - Image 1](https://m.media-amazon.com/images/I/513l8BxCfQL.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 ### ⭐⭐⭐⭐ Review *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 ### ⭐⭐⭐⭐⭐ Review *by P***N on 16 January 2024* Upgraded my Ender 3 with these pulleys. The belt tensioners came with toothed pulleys which were a constant problem (layer shifts). The prints with these are absolutely smooth and works great. A highly recommended upgrade that's even cheap. ### ⭐⭐⭐⭐⭐ Review *by C***O on 7 March 2023* Tutto ok ## 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/332344521-3dman-gt2-16toothless-bore-3mm-20toothless-bore-5mm-aluminum-timing](https://www.desertcart.hr/products/332344521-3dman-gt2-16toothless-bore-3mm-20toothless-bore-5mm-aluminum-timing) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-25*