--- product_id: 14227923 title: "RS-550S 18V Brushed DC Motor, 3.175mm Round Shaft, 6V-24V, Drill Repairs" brand: "protechtrader" price: "123.77 DT" currency: TND in_stock: true reviews_count: 13 category: "Pro Tech Trader" url: https://www.desertcart.tn/products/14227923-rs-550s-18v-brushed-dc-motor-3-175mm-round-shaft store_origin: TN region: Tunisia --- # 18V optimal voltage range 3.175mm precision round shaft Up to 20,000 RPM speed RS-550S 18V Brushed DC Motor, 3.175mm Round Shaft, 6V-24V, Drill Repairs **Brand:** protechtrader **Price:** 123.77 DT **Availability:** ✅ In Stock ## Summary > ⚙️ Upgrade your drill game with power and precision that professionals trust! ## 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?** 123.77 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/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 - • **High-Speed Performance:** Achieves up to 20,000 RPM with no load, delivering the speed your tools demand for professional-grade results. - • **Seamless Compatibility:** 3.175mm round shaft and dual M3 mounting holes ensure a perfect fit for drills, robots, and DIY builds. - • **Lightweight Yet Durable:** Compact 57mm x 37.5mm alloy steel body weighing just 218g—engineered for easy installation and lasting strength. - • **Trusted Replacement Solution:** Ideal for Black & Decker Matrix and Craftsman drills, offering a cost-effective, hassle-free motor upgrade. - • **Power Your Projects with Precision:** Runs efficiently between 6V-24V, hitting peak performance at 18V for smooth, reliable torque. ## Overview The RS-550S 18V Brushed DC Motor is a compact, high-speed motor designed for drill repairs and DIY projects. Featuring a 3.175mm round shaft, dual M3 mounting holes, and an optimal voltage range of 6V to 24V (best at 12V-18V), it delivers up to 20,000 RPM. Lightweight at 218g with a durable alloy steel body, it fits popular models like Black & Decker Matrix and Craftsman drills, making it a reliable, cost-effective replacement motor. ## 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: Perfect fit. - 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. ## 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 | #234,037 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #475 in Electric Fan Motors | | Brand | ProTechTrader | | Brand Name | ProTechTrader | | Customer Reviews | 4.3 out of 5 stars 321 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. ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐ Work horse motor *by E***L on January 15, 2026* This is a common motor with lots of torque used in many tools. Drills, saws etc. Very good to have for lots of projects. ## 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.tn/products/14227923-rs-550s-18v-brushed-dc-motor-3-175mm-round-shaft](https://www.desertcart.tn/products/14227923-rs-550s-18v-brushed-dc-motor-3-175mm-round-shaft) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-12*