--- product_id: 14123624 title: "A28-400 Brushed, Rare-Earth Neodymium Magnet Motor, 12V, 24V, or 36 VDC, 4900 RPM" brand: "ampflow" price: "R24864" currency: ZAR in_stock: true category: "Amp Flow" url: https://www.desertcart.co.za/products/14123624-a28-400-brushed-rare-earth-neodymium-magnet-motor-12v-24v store_origin: ZA region: South Africa --- # 3200W peak power Compact 3"x6.7" size 25 Nm max stall torque A28-400 Brushed, Rare-Earth Neodymium Magnet Motor, 12V, 24V, or 36 VDC, 4900 RPM **Brand:** ampflow **Price:** R24864 **Availability:** ✅ In Stock ## Summary > ⚙️ AmpFlow A28-400: Power, precision, and performance in a sleek package ## Quick Answers - **What is this?** A28-400 Brushed, Rare-Earth Neodymium Magnet Motor, 12V, 24V, or 36 VDC, 4900 RPM by ampflow - **How much does it cost?** R24864 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/14123624-a28-400-brushed-rare-earth-neodymium-magnet-motor-12v-24v) ## Best For - ampflow enthusiasts ## Why This Product - Trusted ampflow brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Durable aluminum body with high-quality ball bearings for smooth, reliable operation - • **Efficiency Champion:** Hit 83% efficiency at 24V and 4500 RPM to save energy and run cooler - • **Versatile Integration:** Reversible motor with encoder shaft ready for advanced automation setups - • **Powerhouse Performance:** Unleash up to 4.3 HP peak power for demanding projects - • **Precision Speed Control:** Variable 12-36V input lets you dial RPM from 2450 to 7350+ ## Overview The AmpFlow A28-400 is a compact brushed DC motor featuring rare-earth neodymium magnets, delivering up to 3200 watts (4.3 HP) peak power and 25 Nm stall torque. It operates efficiently at 83% peak efficiency at 24V and 4500 RPM, with a versatile voltage range of 12-36V. Built with durable aluminum castings and high-quality ball bearings, this 6.9-pound motor is ideal for robotics, automation, and industrial applications requiring reliable, high-performance power. ## Description The AmpFlow A28-400 motor is designed to deliver the highest performance and efficiency possible from a brushed DC motor of this size. This is achieved by the use of rare-earth neodymium magnets, along with four brushes, and advanced electromagnetic computer modeling and design. This reversible motor can be used at voltages ranging from 12V to 36V (the RPM is proportional to the voltage.) At 24 Volts, it has a no-load speed of 4900 RPM. Peak short-term power output is 3200 Watts (4.3 horsepower). Peak efficiency of 83% is reached while drawing 50 Amps at 4500 RPM. The power output at 50 Amps is 1000 Watts (1.3 horsepower). These motors are made from two sturdy aluminum castings and a seamless body. The A28-400 motor is 3.0 inches in diameter and 6.7 inches long. The 1/2-inch diameter shaft is two inches long, and it rides in two high-quality ball bearings. There is a short 3/8-inch diameter shaft on the rear of the motor for mounting an optical encoder. The heavy-gauge 12 AWG motor leads are 17 inches long. The motor weighs 6.9 pounds, and it is finished in a high-quality black powder-coat paint. This motor is also available with an optional gearhead. Search desertcart for "AmpFlow Gearmotors". AmpFlow® motors are used in diverse applications, including robots, industrial motion control, factory automation, semiconductor manufacturing, power tools, pumps, and personal transport systems. Search desertcart for "AmpFlow motors" for more choices. ## Features - Measures 3.0 inches diameter (77 mm) by 6.7 inches long (170 mm) - No-load rpm: 4900 at 24 volts; Can be used with voltages ranging from 12V to 36VDC - Maximum power: 3200 watts (4.3 horsepower); Maximum stall torque: 25 Nm (3560 oz-in) - Peak efficiency at 24V: 83% at 50 amps and 4500 RPM - Power and torque at peak efficiency: 1000 watts (1.3 horsepower) and 1350 mNm (300 oz-in) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00AG21RUE | | Best Sellers Rank | #2,766,736 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,916 in Permanent Magnet Motors | | Brand | AmpFlow | | Brand Name | AmpFlow | | Customer Reviews | 5.0 out of 5 stars 1 Review | | Global Trade Identification Number | 00837654547694 | | Horsepower | 1000 watts | | Included Components | One motor | | Item Weight | 6.9 pounds | | Manufacturer | AmpFlow | | Material | Aluminum | | Material Type | Aluminum | | Model | A28-400 | | Number of Items | 1 | | Part Number | A28-400 | | Speed | 4900 rpm | | UPC | 837654547694 | | Unit Count | 1 Count | | Voltage | 12 volts, 24 volts | ## Product Details - **Brand:** AmpFlow - **Horsepower:** 1000 watts - **Material:** Aluminum - **Speed:** 4900 rpm - **Voltage:** 12 volts, 24 volts ## Images ![A28-400 Brushed, Rare-Earth Neodymium Magnet Motor, 12V, 24V, or 36 VDC, 4900 RPM - Image 1](https://m.media-amazon.com/images/I/61-AiZvJJOL.jpg) ![A28-400 Brushed, Rare-Earth Neodymium Magnet Motor, 12V, 24V, or 36 VDC, 4900 RPM - Image 2](https://m.media-amazon.com/images/I/61+fut9fF4L.jpg) ![A28-400 Brushed, Rare-Earth Neodymium Magnet Motor, 12V, 24V, or 36 VDC, 4900 RPM - Image 3](https://m.media-amazon.com/images/I/51OrdcHsAQL.jpg) ## Frequently Bought Together - AmpFlow A28-400 Brushed Electric Motor, 12V, 24V or 36 VDC, 4900 RPM - High Torque DC Motor 12 V/24 V Permanent Magnet Motor Mini DC Motor DIY Generator Motor 30W CW/CCW with Moun - DC Motor Speed Controller,Brush Motor Driver Controls Module DC 9V-60V 12V 24V 36V 48V 60V Motor Pulse Width Modulator Regulator 20A 1200W PWM Monitor Dimmer Governor with Switch & Knob +1 --- ## 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/14123624-a28-400-brushed-rare-earth-neodymium-magnet-motor-12v-24v](https://www.desertcart.co.za/products/14123624-a28-400-brushed-rare-earth-neodymium-magnet-motor-12v-24v) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-10-23*