--- product_id: 14227923 title: "RS-550S 18V Brushed DC Motor, 3.175mm Round Shaft, 6V-24V, Drill Repairs" brand: "protechtrader" price: "R608" currency: ZAR in_stock: true reviews_count: 13 category: "Pro Tech Trader" url: https://www.desertcart.co.za/products/14227923-rs-550s-18v-brushed-dc-motor-3-175mm-round-shaft store_origin: ZA region: South Africa --- # Up to 20,000 RPM speed Dual M3 mounting holes for secure fit 3.175mm precision round shaft RS-550S 18V Brushed DC Motor, 3.175mm Round Shaft, 6V-24V, Drill Repairs **Brand:** protechtrader **Price:** R608 **Availability:** ✅ In Stock ## Summary > ⚙️ Power your projects with precision and speed — don’t get left behind! ## Quick Answers - **What is this?** RS-550S 18V Brushed DC Motor, 3.175mm Round Shaft, 6V-24V, Drill Repairs by protechtrader - **How much does it cost?** R608 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/14227923-rs-550s-18v-brushed-dc-motor-3-175mm-round-shaft) ## Best For - protechtrader enthusiasts ## Why This Product - Trusted protechtrader brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Shaft Fit:** 3.175mm round shaft ensures seamless compatibility with your drill spindle. - • **Lightweight & Compact:** Compact 57mm x 37.5mm body weighing just 218g for easy integration and handling. - • **Robust Mounting Design:** Dual M3 mounting holes guarantee stable installation in drills, robots, and DIY projects. - • **Versatile Voltage Range:** Operates efficiently from 6V to 24V, optimized for 12V-18V setups. - • **High-Velocity Powerhouse:** Delivers blistering speeds up to 20,000 RPM for rapid drill performance. ## Overview The RS-550S 18V Brushed DC Motor is a compact, lightweight motor designed for drill repairs and DIY electronics. Featuring a 3.175mm round shaft and dual M3 mounting holes, it runs efficiently across a wide voltage range (6V-24V) with optimal performance near 12-18V, reaching speeds up to 20,000 RPM. Ideal for professionals seeking a reliable, high-speed replacement motor that fits perfectly in various power tools and robotics applications. ## Description desertcart.com: RS-550S 18V Brushed DC Motor, 3.175mm Round Shaft, 6V-24V, Drill Repairs : Toys & Games Review: Perfect replacement motor for BDCDMT120 B&D Matrix drill - The motor on my Black & Deck Matrix drill (BDCDMT120C) went kaputt, so I set out to find a low-cost solution. ALL the reviews for the motor with the actual part number from the drill said that motor was worthless. I found a Reddit post recommending this motor. Lo and behold, it's the real deal. It is a perfect fit, and it fired right up after changing it out. It took about fifteen minutes to open the machine (eight screws), take the motor out, remove the spindle from the old shaft and put it on this one, put it back together, and start drilling again. The only weird thing is this new motor spins more slowly than the old one (rs -50vc-7527), but I don't really think that matters to me. If this motor lasts, then it's worth the money. If it doesn't, I will update this review. Review: Good - A little smaller than the original motor but works just fine. Get the job done little craftsman weedeater is what it went in. ## Features - RS-550S brushed DC motor has carbon brushes, a 57mm x 37.5mm body, and weighs about 218g for repairs. - Runs from 6V to 24V with an optimal 12V to 18V range and reaches about 20,000 RPM with no load near 18V. - Round shaft measures about 3.175mm in diameter and 9mm long; confirm the shaft shape and size before use. - Two M3 mounting holes support installation in suitable drills, robots, ride-on toys, and DIY electronics builds. - Fit is not universal; compare body size, mounting holes, voltage, round shaft dimensions, and current needs. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00TE42PME | | Amperage | 10 A | | Best Sellers Rank | #178,079 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #290 in Electric Fan Motors | | Brand | ProTechTrader | | Brand Name | ProTechTrader | | Customer Reviews | 4.2 out of 5 stars 324 Reviews | | Global Trade Identification Number | 00789048342524 | | Horsepower | 180 watts | | Included Components | Motor | | Item Dimensions W x H | 1.46"W x 2.24"H | | Item Weight | 7.7 ounces | | Manufacturer | ProTechTrader | | Material | Alloy Steel | | Material Type | Alloy Steel | | Model | RS-550 | | Number of Items | 1 | | Part Number | RS-550S-R | | Product Dimensions | 1.46"W x 2.24"H | | Shaft Diameter | 37.5 millimeters | | Speed | 20000 rpm | | UPC | 789048342524 | | Unit Count | 1 Count | | Voltage | 12 volts | ## Product Details - **Brand:** ProTechTrader - **Horsepower:** 180 watts - **Product Dimensions:** 1.46"W x 2.24"H - **Speed:** 20000 rpm - **Voltage:** 12 volts ## Images ![RS-550S 18V Brushed DC Motor, 3.175mm Round Shaft, 6V-24V, Drill Repairs - Image 1](https://m.media-amazon.com/images/I/51PvwvyqGtL.jpg) ![RS-550S 18V Brushed DC Motor, 3.175mm Round Shaft, 6V-24V, Drill Repairs - Image 2](https://m.media-amazon.com/images/I/81NK+oiu36L.jpg) ![RS-550S 18V Brushed DC Motor, 3.175mm Round Shaft, 6V-24V, Drill Repairs - Image 3](https://m.media-amazon.com/images/I/713Yy+NMLuL.jpg) ![RS-550S 18V Brushed DC Motor, 3.175mm Round Shaft, 6V-24V, Drill Repairs - Image 4](https://m.media-amazon.com/images/I/71mJoORBvgL.jpg) ## Available Options This product comes in different **Number Of Items** options. ## Questions & Answers **Q: Can i use it to make a electric scooter carrying 50kg load** A: I think so maybe if you're running 24 volts. I run 24 volts with my kids electric 4-wheelers and electric dirt bike.They are 5 and 3 thier Electric bikes fly with them on it. My wife weighs 120 she rides the electric four wheeler when my son gets mad back home. **Q: how many turns is this motor** A: James, this is a 33 turn motor. **Q: Has anyone tried this in a kids power wheels running 18v tool battery** A: Yes, I can say we have had multiple customer replace power wheels motors with these motors. Depending on the model power wheels and you configuration this could be a drop in replacement. You will need to be sure you have no more then 10 amps being pulled by each motor consistently or the motors may overheat, and you will have to have the correct gear size to fit your power wheels on the shaft, but again many DIYers have reported using these motors in Power Wheels as a upgrade **Q: do you have shaft adapters or extentions for this motor** A: I am sorry we do not have any accessories for them since they were manufacture leftovers that never got used, so we just have the loose motors. We do have a nearly identical motor for sale on Amazon with a gear pre-installed at the factory. It is available here: http://www.amazon.com/RS-550s-18v-6v-Torque-Drills/dp/B00WQBVDJI/ref=sr_1_8?ie=UTF8&qid=1435507507&sr=8-8&keywords=dc+motor+18v ## Customer Reviews ### ⭐⭐⭐⭐⭐ Perfect replacement motor for BDCDMT120 B&D Matrix drill *by S***T on February 22, 2025* The motor on my Black & Deck Matrix drill (BDCDMT120C) went kaputt, so I set out to find a low-cost solution. ALL the reviews for the motor with the actual part number from the drill said that motor was worthless. I found a Reddit post recommending this motor. Lo and behold, it's the real deal. It is a perfect fit, and it fired right up after changing it out. It took about fifteen minutes to open the machine (eight screws), take the motor out, remove the spindle from the old shaft and put it on this one, put it back together, and start drilling again. The only weird thing is this new motor spins more slowly than the old one (rs -50vc-7527), but I don't really think that matters to me. If this motor lasts, then it's worth the money. If it doesn't, I will update this review. ### ⭐⭐⭐⭐⭐ Good *by K***N on April 28, 2026* A little smaller than the original motor but works just fine. Get the job done little craftsman weedeater is what it went in. ### ⭐⭐⭐⭐⭐ Perfect fit. *by J***R on November 21, 2025* This motor was a perfect replacement for my two drills. It fit both my Black & Decker Matrix and my Craftsman Bolt On. I liked that the motor came without a gear on it so I was able to easily move the gear from the old motor to the new one. Replacement was simple and the new motors work great. ## Frequently Bought Together - RS-550s 18v (12v - 20 Volts) DC Motor Round Shaft - High Power & Torque for DIY Electric/Electronic Projects, Drills, Robots, RC Vehicals, Remote Controlled Cars/Robot, Saw Repair/Replacement Engine - RioRand 12V-40V 10A PWM DC Motor Speed Controller with Knob-High Efficiency, High Torque, Low Heat Generating with Reverse Polarity Protection, High Current Protection --- ## 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.za/products/14227923-rs-550s-18v-brushed-dc-motor-3-175mm-round-shaft](https://www.desertcart.co.za/products/14227923-rs-550s-18v-brushed-dc-motor-3-175mm-round-shaft) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-09-19*