--- product_id: 431660720 title: "40T Brass Worm Gear Wheel & 5mm Hole Diameter Worm Gear Shaft Kits 0.5 Modulus Set 1:40 Reduction Ratio Drive Gear Box" brand: "cnbtr" price: "฿1880" currency: THB in_stock: true reviews_count: 5 category: "Cnbtr" url: https://www.desertcart.co.th/products/431660720-40t-brass-worm-gear-wheel-and-5mm-hole-diameter-worm store_origin: TH region: Thailand --- # 0.5 modulus for fine gear teeth 5mm hole diameter for versatile shaft fit 40T brass gear wheel for precision 40T Brass Worm Gear Wheel & 5mm Hole Diameter Worm Gear Shaft Kits 0.5 Modulus Set 1:40 Reduction Ratio Drive Gear Box **Brand:** cnbtr **Price:** ฿1880 **Availability:** ✅ In Stock ## Summary > ⚙️ Unlock precision power with every turn! ## Quick Answers - **What is this?** 40T Brass Worm Gear Wheel & 5mm Hole Diameter Worm Gear Shaft Kits 0.5 Modulus Set 1:40 Reduction Ratio Drive Gear Box by cnbtr - **How much does it cost?** ฿1880 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/431660720-40t-brass-worm-gear-wheel-and-5mm-hole-diameter-worm) ## Best For - cnbtr enthusiasts ## Why This Product - Trusted cnbtr brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Lightweight Design:** Small footprint and light weight make it ideal for space-conscious, high-efficiency setups. - • **High Reduction Ratio Powerhouse:** 1:40 gear ratio delivers significant torque multiplication for demanding mechanical applications. - • **Versatile 5mm Shaft Compatibility:** Standard hole diameter fits a wide range of shafts, simplifying integration into your projects. - • **Precision Engineered Brass Gearing:** Durable brass construction ensures long-lasting, reliable performance in compact form. - • **Quality Assured & Ready to Install:** Each set includes gear wheel, shaft, and screws with quality inspection for hassle-free assembly. ## Overview The CNBTR 40T Brass Worm Gear Wheel & 5mm Hole Diameter Worm Gear Shaft Kit features a finely machined 0.5 modulus brass gear set with a 1:40 reduction ratio, designed for compact, lightweight power transmission. Crafted from durable brass, this kit offers reliable, long-term service and easy integration with standard 5mm shafts, making it perfect for professional-grade mechanical and threading applications. ## Description Specifications: Material: Brass Modulus:0.5 Reduction Ratio: 1:40 Brand name: CNBTR Weight: 28g Gear Wheel: T:40 T Dia: 21.2MM Height: 12MM/0.47 Inch Outer Diameter: 21MM/0.82 Inch Hole Diameter: 5MM/0.2 Inch Step Size: 15x7MM/0.59x0.27 Inch (Dia x H) Overall Size: 12x21x5MM/0.47x0.82x0.2Inch(H x OD x ID) Gear Shaft: Height: 20MM/0.79 Inch Outer Diameter: 9.7MM/0.38 Inch Inner Diameter: 5MM/0.2 Inch Size: 20x9.7x5MM/0.79x0.38x0.2 Inch(H x OD x ID) Features: 1.Set include one 0.5 modulus 5MM Hole Dia brass gear shaft and one 40 T brass gear wheel. 2.The transmission structure of shaft is simple, compact, small volume and light weight. 3.Shaft Z1=1, turn a round of gear T, can get a large transmission ratio, generally in the power transmission, the transmission ratio I=10-80, like big transmission ratio, if use with gear transmission, will need to take the multi-stage transmission. 4.High quality material selection, carefully processing create high quality product. 5.Made of brass, long time service. Package Content: 1 x Brass Gear Shaft 1 x Brass Wheel 2 x Screws The unique MPN label on each inner package, which confirm it passed the quality inspection and it is genuine item sold from our shop. Please offer it to us. Review: unusable - What ever you do, do not purchase this item, it is not a worm and wheel. the worm has several straight groves in it, not a thread or spiral. It will not do anything as advertised. The worm will not turn the wheel as there is a fault in the manufacture. of the worm, ie it has groves not a spiral. Review: Excellent - Excellently machined worm pair. Exact to the specified dimensions. ## Features - Set include one 0.5 modulus 5MM Hole Dia brass gear shaft and one 40 T brass gear wheel. - The transmission structure of shaft is simple, compact, small volume and light weight. - Shaft Z1=1, turn a round of gear T, can get a large transmission ratio, generally in the power transmission, the transmission ratio I=10-80, like big transmission ratio, if use with gear transmission, will need to take the multi-stage transmission. - High quality material selection, carefully processing create high quality product. - Made of brass, long time service. - If the product you receive does not match the size or quantity, please feel free to contact us and we will be happy to solve the problem for you. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07G54YQL4 | | Item model number | M6180801074 | | Manufacturer | CNBTR | | Package Dimensions | 7.7 x 7.4 x 1.3 cm; 30 g | ## Images ![40T Brass Worm Gear Wheel & 5mm Hole Diameter Worm Gear Shaft Kits 0.5 Modulus Set 1:40 Reduction Ratio Drive Gear Box - Image 1](https://m.media-amazon.com/images/I/71P0hkWDqpL.jpg) ## Customer Reviews ### ⭐ unusable *by S***R on 13 October 2019* What ever you do, do not purchase this item, it is not a worm and wheel. the worm has several straight groves in it, not a thread or spiral. It will not do anything as advertised. The worm will not turn the wheel as there is a fault in the manufacture. of the worm, ie it has groves not a spiral. ### ⭐⭐⭐⭐⭐ Excellent *by P***N on 13 September 2025* Excellently machined worm pair. Exact to the specified dimensions. ### ⭐⭐⭐⭐⭐ Come da descrizione. *by P***P on 12 February 2024* Buona manifattura. Come descritto dal venditore: corona da 40 denti e rapporto di riduzione 1:40 (40 giri di vite senza fine per 360° di rotazione del pignone). Sono compresi 2 grani brugola per il fissaggio sui rispettivi alberi. ## Frequently Bought Together - CNBTR 40T Brass Gear Wheel & 5mm Hole Diameter Gear Shaft Kits 0.5 Modulus Set 1:40 Reduction Ratio Drive Gear Box - uxcell 6mm x 250mm 304 Stainless Steel Solid Round Rod for DIY Craft - 5pcs - WINSINN GT2 Idler Pulley - 20 Toothless, 5mm Bore, for 10mm Width Timing Belt, Aluminum - Ideal for 3D Printers, CNC Machines (5-Pack) --- ## 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.co.th/products/431660720-40t-brass-worm-gear-wheel-and-5mm-hole-diameter-worm](https://www.desertcart.co.th/products/431660720-40t-brass-worm-gear-wheel-and-5mm-hole-diameter-worm) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-06-11*