--- product_id: 67801273 title: "GT2 Idler Pulley - 20 Toothless, 5mm Bore, for 10mm Width Timing Belt, Aluminum - Ideal for 3D Printers, CNC Machines (5-Pack)" brand: "winsinn" price: "€ 23.38" currency: EUR in_stock: true reviews_count: 8 category: "Winsinn" url: https://www.desertcart.gr/products/67801273-gt2-idler-pulley-20-toothless-5mm-bore-for-10mm-width store_origin: GR region: Greece --- # 5mm precision bore for secure shaft fit 20 toothless grooves for smooth belt guidance Durable aluminum with rust-resistant oxidation GT2 Idler Pulley - 20 Toothless, 5mm Bore, for 10mm Width Timing Belt, Aluminum - Ideal for 3D Printers, CNC Machines (5-Pack) **Brand:** winsinn **Price:** € 23.38 **Availability:** ✅ In Stock ## Summary > ⚙️ Upgrade your precision game with WINSINN GT2 – where smooth meets sturdy! ## Quick Answers - **What is this?** GT2 Idler Pulley - 20 Toothless, 5mm Bore, for 10mm Width Timing Belt, Aluminum - Ideal for 3D Printers, CNC Machines (5-Pack) by winsinn - **How much does it cost?** € 23.38 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/67801273-gt2-idler-pulley-20-toothless-5mm-bore-for-10mm-width) ## Best For - winsinn enthusiasts ## Why This Product - Trusted winsinn brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Rock-Solid Shaft Stability:** 5mm bore fits standard shafts perfectly, eliminating wobble and maximizing mechanical accuracy. - • **Bulk Pack for Multiple Projects:** Five high-quality pulleys per pack—ideal for upgrades, replacements, or scaling your maker projects. - • **Built to Last with Premium Aluminum:** Surface-oxidized aluminum resists rust and corrosion, keeping your setup reliable and maintenance-free. - • **Optimized for 10mm GT2 Timing Belts:** Perfect alignment with 10mm belts guarantees consistent performance and longer belt life. - • **Precision Engineered for Smooth Operation:** 20 toothless grooves ensure whisper-quiet, slip-free belt tensioning in your 3D printer or CNC machine. ## Overview The WINSINN GT2 Idler Pulley is a 5-pack of durable, aluminum, toothless pulleys designed for 10mm width GT2 timing belts. Featuring a 5mm bore for secure shaft fit and 20 outer grooves for smooth belt guidance, these pulleys are optimized for 3D printers and CNC machines, delivering reliable, low-maintenance performance with corrosion resistance. ## Description Enhance Your 3D Printer with WINSINN GT2 Idler Pulley - 20 Toothless, 5mm Bore, for 10mm Width Timing BeltImprove the performance of your 3D printer with this precision-engineered GT2 idler pulley. Designed for smooth operation, it ensures proper tension and alignment of timing belts in compact setups.**Key Features**Durable Aluminum: Crafted from high-quality aluminum with surface oxidation for rust and corrosion resistance.Toothless Design: Features 20 outer grooves, perfect for tensioning or guiding belts smoothly.5mm Bore: Fits standard 5mm shafts securely, minimizing slippage in small systems.10mm Belt Compatibility: Works seamlessly with 6mm width GT2 timing belts for optimal results.**Why Choose This Pulley?**This idler pulley delivers reliable performance for 3D printers and similar equipment. Its toothless design reduces belt wear, while the sturdy build supports consistent operation in precision tasks.**Installation Tips**Clean the shaft before mounting to ensure a firm fit.Align the pulley with the belt path to prevent uneven wear.Check alignment periodically for best results.**Package Includes**Five idler pulleys per pack, ideal for replacements or multiple projects. Upgrade your setup with this dependable component today. Review: Great quality pulleys—perfect for my CNC build - I used these WINSINN GT2 idler pulleys as part of a custom CNC printer project, and they worked out better than expected. The aluminum feels solid and well-machined, and the 20-tooth profile lined up perfectly with my 6mm timing belts. Installation was quick—everything fit snugly on the 5mm shaft, and the movement stayed smooth without any wobble or noise. I’d definitely use them again on future builds. If you're working on a 3D printer or CNC system, this will do the trick. Reliable, clean finish, and no headaches. Review: Worked Great! - Winsinn consistently makes great products. Does not matter the product. All well-made and work perfectly. ## Features - 【Durable Aluminum Build】Made from high-quality aluminum with surface oxidation treatment for effective rust and corrosion resistance, ensuring reliable use in various settings. - 【Toothless, 20 Design】Features a toothless design with 20 outer grooves, ideal for guiding or tensioning timing belts smoothly in precision applications like 3D printers. - 【5mm Bore Precision】Engineered with a 3mm bore to securely fit standard shafts, providing stability and reducing slippage during operation in compact equipment setups. - 【For 10mm Width Belts】Compatible with 10mm width GT2 timing belts, ensuring proper alignment and performance in small-scale mechanical systems like 3D printers. - 【Versatile Application】Perfect for 3D printers and similar devices needing consistent belt tension, offering dependable performance without complex maintenance needs. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07BPHRSN5 | | Belt Style | Timing Belt | | Best Sellers Rank | #10,488 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #3 in Mechanical Timing Pulleys | | Brand | WINSINN | | Brand Name | WINSINN | | Color | 5mm Bore Toothless | | Compatible Devices | 3D Printer | | Customer Reviews | 4.6 out of 5 stars 784 Reviews | | Manufacturer | WINSINN | | Material | Aluminum | | Material Type | Aluminum | | UPC | 686603768907 | ## Product Details - **Belt Style:** Timing Belt - **Brand:** WINSINN - **Color:** 5mm Bore Toothless - **Compatible Devices:** 3D Printer - **Material:** Aluminum ## Images ![GT2 Idler Pulley - 20 Toothless, 5mm Bore, for 10mm Width Timing Belt, Aluminum - Ideal for 3D Printers, CNC Machines (5-Pack) - Image 1](https://m.media-amazon.com/images/I/61UKpH3wohL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Questions & Answers **Q: How do you insert an axle into the bearing-- if it's too small it won't engage the bearing. Does one crimp it somehow?** A: The axel should be only slightly smaller in diameter of the inner hole on the pulley. Mine is held in place on my printer by the sidewall of the bracket and nylon bushings on either side of the pulley that holds it onto my printer and keeping it aligned with the drive motors pulley on the other end. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great quality pulleys—perfect for my CNC build *by D***R on July 18, 2025* I used these WINSINN GT2 idler pulleys as part of a custom CNC printer project, and they worked out better than expected. The aluminum feels solid and well-machined, and the 20-tooth profile lined up perfectly with my 6mm timing belts. Installation was quick—everything fit snugly on the 5mm shaft, and the movement stayed smooth without any wobble or noise. I’d definitely use them again on future builds. If you're working on a 3D printer or CNC system, this will do the trick. Reliable, clean finish, and no headaches. ### ⭐⭐⭐⭐⭐ Worked Great! *by A***Y on October 29, 2025* Winsinn consistently makes great products. Does not matter the product. All well-made and work perfectly. ### ⭐⭐⭐⭐⭐ Needs a touch of oil *by S***1 on November 2, 2025* It idles fine I guess, and the dimensions were good. I did find that it spun better after I added a few drops of machine oil and let it soak into the bearing. ## Frequently Bought Together - WINSINN GT2 Idler Pulley 20 Toothless 5mm Bore 10mm Width Timing Pulley Wheel Aluminum for 3D Printer (Pack of 5Pcs) - WINSINN GT2 Pulley 16 Teeth 5mm bore 10mm Width 16T Timing Belt Pulley Wheel Aluminum for 3D Printer (Pack of 5Pcs) - 5M GT2 Timing Belt, Upgrade Non-Slip Version, Width 6mm, Fit for 3D Printer and Most Belt Driven Printers --- ## 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.gr/products/67801273-gt2-idler-pulley-20-toothless-5mm-bore-for-10mm-width](https://www.desertcart.gr/products/67801273-gt2-idler-pulley-20-toothless-5mm-bore-for-10mm-width) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-07-11*