--- product_id: 483173891 title: "CNCTOPBAOS NMRV030 Worm Gear Reducer Gearbox 20:1 for Nema23 Stepper Motor | Speed Ratio 20:1 Worm Drive, 60mm Flange, 11mm Input Shaft, 14mm Output Shaft, RV30 NMRV30 Square Worm Gearbox Speed Reducer" brand: "cnctopbaos" price: "$212.12" currency: USD in_stock: true reviews_count: 2 category: "Cnctopbaos" url: https://www.desertcart.us/products/483173891-cnctopbaos-nmrv030-worm-gear-reducer-gearbox-20-1-for-nema23 store_origin: US region: United States of America --- # 60mm Nema23 standard flange 20:1 precision speed ratio Die-cast aluminum alloy housing CNCTOPBAOS NMRV030 Worm Gear Reducer Gearbox 20:1 for Nema23 Stepper Motor | Speed Ratio 20:1 Worm Drive, 60mm Flange, 11mm Input Shaft, 14mm Output Shaft, RV30 NMRV30 Square Worm Gearbox Speed Reducer **Brand:** cnctopbaos **Price:** $212.12 **Availability:** ✅ In Stock ## Summary > ⚙️ Unlock precision power with the CNCTOPBAOS worm gearbox — where torque meets flawless control! ## Quick Answers - **What is this?** CNCTOPBAOS NMRV030 Worm Gear Reducer Gearbox 20:1 for Nema23 Stepper Motor | Speed Ratio 20:1 Worm Drive, 60mm Flange, 11mm Input Shaft, 14mm Output Shaft, RV30 NMRV30 Square Worm Gearbox Speed Reducer by cnctopbaos - **How much does it cost?** $212.12 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/483173891-cnctopbaos-nmrv030-worm-gear-reducer-gearbox-20-1-for-nema23) ## Best For - cnctopbaos enthusiasts ## Why This Product - Trusted cnctopbaos brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Plug-and-Play Versatility:** Pre-lubricated and factory-tested for immediate use across CNC routers, 3D printers, robotic arms, and more. - • **Precision 20:1 Speed Ratio:** Engineered for exact speed control and torque boost, ideal for CNC and automation. - • **Smooth, Low-Noise Operation:** High-precision worm gears and quality bearings deliver stable, quiet transmission under heavy loads. - • **Standardized Nema23 Mounting:** Seamless compatibility with most Nema23 stepper and servo motors for hassle-free integration. - • **Robust Aluminum Alloy Enclosure:** Durable, corrosion-resistant housing ensures long-lasting performance and excellent heat dissipation. ## Overview The CNCTOPBAOS NMRV030 Worm Gear Reducer offers a precise 20:1 speed ratio tailored for Nema23 stepper motors, featuring a standardized 60mm flange and robust die-cast aluminum housing. Designed for industrial automation and CNC applications, it ensures smooth, low-noise operation with minimal backlash. Pre-lubricated and ready to install, this gearbox delivers reliable torque amplification and seamless compatibility for professional-grade motion control. ## Description Product Description Review: Works great! Heavy Duty and affordable for what it is. - This unit is super solid and is a great price for what you get. Gearbox comes fully lubricated and is factory sealed. so don't expect to open it easily (not that you'd need to). It's full of oil and you'd need to remove the rubber gasket without damaging it somehow. The biggest issue I had was finding the appropriate hardware for driving the input side of the gearbox. The main input has an odd inner diameter of 11mm (7/16") with a 4mm wide key and I underestimated how hard it would be to find appropriate components to drive this with a larger shaft. With that said, the manufacturer included coupler that adapts this down to an 8mm d-shaft and that fits standard sized servos traditionally used for this. Review: Arrived with wrong motor mount holes, returning immediately. - As others have said, the mounting holes on this gearbox DO NOT LINE UP WITH NEMA 23 STANDARD HOLES. I bought 4 of them hoping it would be OK. Also, the movement of the gears is quite stiff; definitely use with beefy steppers/servos if you can figure out how to get them to fit. Will be returning these for sure. Absolutely unusable. ## Features - Precision 20:1 Speed Ratio Worm Gear Reducer: Model NMRV030-20 worm gearbox with 20:1 speed ratio, engineered for accurate speed regulation and torque amplification, perfectly matched with Nema23 stepper motors for CNC equipment, industrial automation lines and precision motion control scenarios - Standardized Mounting & Shaft Specifications: Features a 60mm x 60mm (2.36 inch x 2.36 inch) standard Nema23 flange with 47mm x 47mm (1.85 inch x 1.85 inch) motor mounting hole spacing, matched with an 11 mm (0.43 inch) input bore diameter and 14 mm (0.55 inch) output shaft diameter, ensuring seamless installation and full compatibility with most mainstream Nema23 stepper motors/servo motors on the market - High-Strength Aluminum Alloy Enclosure: Made of die-cast aluminum alloy housing, delivers excellent thermal dissipation performance, high rigidity and corrosion resistance; compact structure adapts to limited installation space while effectively extending the service life of the gearbox - Smooth Transmission & Low Noise Operation: Adopts high-precision worm gear and high-quality bearing structure, provides stable transmission with large load-bearing capacity, minimal backlash and low operating noise, suitable for long-term continuous operation in industrial and precision projects - Wide Compatibility: It adapts to most automation scenarios, whether it is a CNC router, small engraving machine, 3D printers, DIY robotic arm, automatic feeding device or student project. It is pre-lubricated and debugged before leaving the factory, and can be used directly without additional maintenance ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B09HGY6FSJ | | Best Sellers Rank | #16,536 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2 in Gearboxes, Gearheads & Speed Reducers | | Brand | CNCTOPBAOS | | Brand Name | CNCTOPBAOS | | Customer Reviews | 3.8 out of 5 stars 4 Reviews | | Manufacturer | CNCTOPBAOS | | Material | Aluminium | | Material Type | Aluminium | | Model Number | 3 | | Number of Items | 1 | | Part Number | 3 | ## Product Details - **Brand:** CNCTOPBAOS - **Material:** Aluminium - **Item Weight:** 1.17 Kilograms - **Manufacturer:** CNCTOPBAOS ## Images ![CNCTOPBAOS NMRV030 Worm Gear Reducer Gearbox 20:1 for Nema23 Stepper Motor | Speed Ratio 20:1 Worm Drive, 60mm Flange, 11mm Input Shaft, 14mm Output Shaft, RV30 NMRV30 Square Worm Gearbox Speed Reducer - Image 1](https://m.media-amazon.com/images/I/71HlnfhvCBL.jpg) ![CNCTOPBAOS NMRV030 Worm Gear Reducer Gearbox 20:1 for Nema23 Stepper Motor | Speed Ratio 20:1 Worm Drive, 60mm Flange, 11mm Input Shaft, 14mm Output Shaft, RV30 NMRV30 Square Worm Gearbox Speed Reducer - Image 2](https://m.media-amazon.com/images/I/71Y0lpK-YHL.jpg) ![CNCTOPBAOS NMRV030 Worm Gear Reducer Gearbox 20:1 for Nema23 Stepper Motor | Speed Ratio 20:1 Worm Drive, 60mm Flange, 11mm Input Shaft, 14mm Output Shaft, RV30 NMRV30 Square Worm Gearbox Speed Reducer - Image 3](https://m.media-amazon.com/images/I/61z7wGYvFBL.jpg) ![CNCTOPBAOS NMRV030 Worm Gear Reducer Gearbox 20:1 for Nema23 Stepper Motor | Speed Ratio 20:1 Worm Drive, 60mm Flange, 11mm Input Shaft, 14mm Output Shaft, RV30 NMRV30 Square Worm Gearbox Speed Reducer - Image 4](https://m.media-amazon.com/images/I/71AEZ-bxUiL.jpg) ![CNCTOPBAOS NMRV030 Worm Gear Reducer Gearbox 20:1 for Nema23 Stepper Motor | Speed Ratio 20:1 Worm Drive, 60mm Flange, 11mm Input Shaft, 14mm Output Shaft, RV30 NMRV30 Square Worm Gearbox Speed Reducer - Image 5](https://m.media-amazon.com/images/I/71bnBhit2aL.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great! Heavy Duty and affordable for what it is. *by P***T on 1 December 2025* This unit is super solid and is a great price for what you get. Gearbox comes fully lubricated and is factory sealed. so don't expect to open it easily (not that you'd need to). It's full of oil and you'd need to remove the rubber gasket without damaging it somehow. The biggest issue I had was finding the appropriate hardware for driving the input side of the gearbox. The main input has an odd inner diameter of 11mm (7/16") with a 4mm wide key and I underestimated how hard it would be to find appropriate components to drive this with a larger shaft. With that said, the manufacturer included coupler that adapts this down to an 8mm d-shaft and that fits standard sized servos traditionally used for this. ### ⭐ Arrived with wrong motor mount holes, returning immediately. *by W***L on 9 September 2024* As others have said, the mounting holes on this gearbox DO NOT LINE UP WITH NEMA 23 STANDARD HOLES. I bought 4 of them hoping it would be OK. Also, the movement of the gears is quite stiff; definitely use with beefy steppers/servos if you can figure out how to get them to fit. Will be returning these for sure. Absolutely unusable. ## Frequently Bought Together - CNCTOPBAOS NMRV30 Worm Gearbox Speed Reducer NMRV030 Worm Gear Reducer Speed Ratio 20:1 RV30 Square Type for Nema23 Stepper Motor Output Hole 14mm Shaft NMRV-030 - CNCTOPBAOS Output Double Shaft Diameter 14mm 0.55" Dual Output Shaft Length 130mm Fit for Worm Reducer Gearbox NMRV030 RV030 Nema23 Stepper Motor with Gaskets S Ring Corner pin - CNCTOPBAOS 8mm to 11mm Stepper Motor Shaft Sleeve 8x11mm Bore Adapter Turbine Reducer Shaft Sleeve for RV030 Worm Gear Speed Reduce RV30 NMRV030 Gearbox 0.31inch --- ## 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.us/products/483173891-cnctopbaos-nmrv030-worm-gear-reducer-gearbox-20-1-for-nema23](https://www.desertcart.us/products/483173891-cnctopbaos-nmrv030-worm-gear-reducer-gearbox-20-1-for-nema23) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-08-02*