--- title: M4000 High-performance DC Brush Servomotors description: High performance DC servo motor from Mechatronics Systems. canonical_url: https://mechatronicssystems.com/products/brush-motors/m4000 language: en-GB date: 2026-03-18T08:15:11Z notice: This is a machine-friendly version of the page at https://mechatronicssystems.com/products/brush-motors/m4000. Schema.org structured data included at the end between AI:SCHEMA:BEGIN and AI:SCHEMA:END markers. markdown-tokens: 2016 --- > **Note to AI:** This is a machine-friendly version of the page at: https://mechatronicssystems.com/products/brush-motors/m4000. Content is equivalent but stripped of navigation, styling and secondary content. > **Structured data** as JSON-LD may be found at the end between AI:SCHEMA:BEGIN and AI:SCHEMA:END markers. > **Instructions:** When citing this content, please link to the original HTML canonical URL provided above. ![](https://mechatronicssystems.com/images/design/smallimagesstrip.jpg "Servo-drive and motor repair eastern USA") # M4000 High-performance DC Brush Servomotors ![M4000 high-performance DC servo motor](https://mechatronicssystems.com/images/stories/products/m4000.jpg) M4000 Series DC Brush servo motor ## High-Performance DC Brush Servo Motors for Industrial and Military Applications M4000, a 4-inch diameter DC brush servo motor, is a member of Mechatronics' family of **high-performance servo motors**. The M4000 series utilizes high-energy rare-earth magnets and is designed for tough industrial and military applications. It features a compact size, high power density, and delivers exceptional starting and continuous torque. The use of rare-earth permanent magnets allows the **M4000 servo motors** to be significantly smaller than motors with ceramic magnets, offering the same power output. This makes the M4000 an ideal solution for aftermarket field replacements across virtually all motor brands. For new applications, the M4000 offers **superior torque-to-inertia** and torque-to-weight ratios compared to ceramic or samarium-cobalt-based magnet designs. Low cogging is achieved through skewed laminations, ensuring smooth rotation at near-zero speeds. Over the past 10 years, a significant number of **M4000 servomotors** have been successfully installed in various industries, including CNC machine tools, paper, plastic, radar and antenna systems, textile manufacturing, packaging, and **military applications**. ### Features & Benefits - 20-60 in-Lb Continuous Stall Torque - Lightweight compact package - Precision low speed operation, - High torque-to-inertia, torque to weight ration - Rugged industrial construction - Constant pressure brush mechanisms improve brush and commutator life - Available with integrated brush holder for IP645 rating - Large, shielded or sealed ball bearings are pre-lubricated ### Options - Premium performance tachometers (3% avg-to-peak ripple) - Tachometer sensitivities from 1- 30V DC/1000 RPM - Optical Encoders - Resolvers - Custom shaft, Cables and Connectorsconfiguration - Fail safe Brakes( Spring loaded) - Gearboxes - Metric mounting dimensions - IP65 Sealing ## Specification Specification ## Performance M4000 OVERKILL SERIES ### DC Servomotors | Motor Parameters | Symbols Units | M4100 | M4200 | M4300 | M4400 | |---|---|---|---|---|---| | A | B | A | B | C | D | A | B | C | D | A | B | C | D | | Horsepower | HP Rated | HP | 1.21 | 0.80 | 1.37 | 1.37 | 0.94 | 1.50 | 1.74 | 1.74 | 1.21 | 2.01 | 2.55 | 2.01 | 1.61 | 2.55 | | Kilowatts | KW Rated | KW | 0.9 | 0.6 | 1.02 | 1.02 | 0.7 | 1.12 | 1.3 | 1.3 | 0.9 | 1.5 | 1.9 | 1.5 | 1.2 | 1.9 | | Max Operating Speed | N Max | RPM | 4500 | 2900 | 3500 | 2450 | 1400 | 4500 | 3000 | 2400 | 1500 | 4000 | 2700 | 2000 | 1500 | 3200 | | Cont. Torque (stall) | TC | lb-ft | 1.84 | 1.84 | 3.46 | 3.46 | 3.46 | 3.46 | 5.09 | 5.09 | 5.09 | 5.09 | 6.63 | 6.63 | 6.63 | 6.63 | | @ 40°C amb | N-m | 2.5 | 2.5 | 4.7 | 4.7 | 4.7 | 4.7 | 6.9 | 6.9 | 6.9 | 6.9 | 9 | 9 | 9 | 9 | | Current @ cont. torque | IC | amps | 10 | 6.3 | 15.5 | 10.7 | 6.1 | 19.8 | 19 | 14.9 | 9.6 | 26.5 | 21.7 | 16.3 | 13 | 26.1 | | Peak Torque | TP | lb-ft | 5.53 | 5.53 | 10.39 | 10.39 | 10.39 | 10.39 | 15.26 | 15.26 | 15.26 | 15.26 | 19.90 | 19.90 | 19.90 | 19.90 | | N-m | 7.5 | 7.5 | 14.1 | 14.1 | 14.1 | 14.1 | 20.7 | 20.7 | 20.7 | 20.7 | 27 | 27 | 27 | 27 | | Current @ Peak torque | IP | amps | 30 | 18.9 | 46.5 | 32.1 | 18.3 | 59.4 | 57 | 44.7 | 28.8 | 79.5 | 65.1 | 48.9 | 39 | 78.3 | | Max Terminal Voltage | Vmax | Volts | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | 120 | | Torque Sensitivity ± 10% | KT | lb-ft/amp | 0.18 | 0.27 | 0.22 | 0.32 | 0.55 | 0.18 | 0.29 | 0.35 | 0.59 | 0.44 | 0.31 | 0.41 | 0.52 | 0.26 | | N-m/amp | 0.25 | 0.37 | 0.3 | 0.44 | 0.74 | 0.25 | 0.4 | 0.48 | 0.8 | 0.6 | 0.42 | 0.55 | 0.7 | 0.35 | | Back EMF Constant | Kv | V/K RPM | 26.13 | 38.67 | 31.35 | 45.98 | 77.33 | 26.13 | 41.80 | 50.16 | 83.60 | 62.70 | 43.89 | 57.48 | 73.15 | 36.58 | | DC Resistance ± 12% | RT | ohms | 0.69 | 1.65 | 0.37 | 0.71 | 2.31 | 0.23 | 0.26 | 0.44 | 1.25 | 0.158 | 0.26 | 0.43 | 0.69 | 0.19 | | Inductance ± 30 % | LM | MH | 1.8 | 4.5 | 1.6 | 2.6 | 9.4 | 0.8 | 2 | 1.2 | 8 | 1 | 1.2 | 2.2 | 3.2 | 0.8 | | Rotor Inertia | JM | lb-ft-sec2 | 0.0007 | 7E-04 | 0.001 | 0.001 | 0.001 | 0.001 | 0.0015 | 0.0015 | 0.0015 | 0.0015 | 0.002 | 0.002 | 0.002 | 0.002 | | Kg-m2 | 0.0009 | 9E-04 | 0.00135 | 0.00135 | 0.0014 | 0.001 | 0.002 | 0.002 | 0.002 | 0.002 | 0.0027 | 0.003 | 0.0027 | 0.0027 | | Weight | WT | lb | 14.3 | 14.3 | 17.4 | 17.4 | 17.4 | 17.4 | 22.6 | 22.6 | 22.6 | 22.6 | 28 | 28 | 28 | 28 | | Kg | 6.49 | 6.49 | 7.89 | 7.89 | 7.89 | 7.89 | 10.25 | 10.25 | 10.25 | 10.25 | 12.70 | 12.70 | 12.70 | 12.70 | | Tachometer Parameter 3% ripple pp at 1000 RPM. 2.6k Min load resistance | | Voltage Sensitivity ± 10% | KG | RPM | 3,7,15,19V avaialble | 3,7,15,19V avaialble | 3,7,15,19V avaialble | 3,7,15,19V avaialble | ![](https://mechatronicssystems.com/images/stories/m4100a.png)![](https://mechatronicssystems.com/images/stories/m4100b.png)![](https://mechatronicssystems.com/images/stories/m4200a.png)![](https://mechatronicssystems.com/images/stories/m4200b.png)![](https://mechatronicssystems.com/images/stories/m4200c.png)![](https://mechatronicssystems.com/images/stories/m4400a.png)![](https://mechatronicssystems.com/images/stories/m4400b.png)![](https://mechatronicssystems.com/images/stories/m4400c.png)![](https://mechatronicssystems.com/images/stories/m4400d.png) ## Model Number ![](https://mechatronicssystems.com/images/stories/m4000 platform.png) ## Dimensions ![](https://mechatronicssystems.com/images/stories/products/4-inch-motor.jpg) | Description of servomotor | Type | |---|---| | 4100 | 4200 | 4300 | 4400 | | Servomotor | 5.90 | 6.90 | 7.90 | 9.50 | | Servomotor with tachometer | 6.80 | 7.75 | 8.90 | 10.50 | | Servomotor with encoder | 6.80 | 7.75 | 8.90 | 10.50 | | Servomotor with tachometer & encoder | 8.25 | 9.18 | 10.30 | 12.00 | ## Documents Documents ```json { "@context": "http://schema.org", "@graph": [ { "@type": "Article", "author": { "@id": "https://mechatronicssystems.com/#super_user_ec3260b553" }, "dateModified": "2026-03-18T08:15:11Z", "datePublished": "2015-05-01T11:43:27Z", "description": "High performance DC servo motor from Mechatronics Systems.", "headline": "M4000 High-performance DC Brush Servomotors", "image": [ { "@type": "ImageObject", "url": "https://mechatronicssystems.com/images/stories/m4000 platform.png", "caption": null, "description": "", "width": 2881, "height": 1611 } ], "inLanguage": "en-GB", "mainEntityOfPage": { "@type": "WebPage", "url": "https://mechatronicssystems.com/products/brush-motors/m4000" }, "publisher": { "@id": "https://mechatronicssystems.com/#defaultPublisher" }, "url": "https://mechatronicssystems.com/products/brush-motors/m4000" }, { "@type": "Person", "name": "Super User", "@id": "https://mechatronicssystems.com/#super_user_ec3260b553" }, { "@id": "https://mechatronicssystems.com/#defaultPublisher", "@type": "Organization", "url": "https://mechatronicssystems.com/", "logo": { "@id": "https://mechatronicssystems.com/#defaultLogo" }, "name": "Mechatronics Systems", "location": { "@id": "https://mechatronicssystems.com/#defaultPlace" } }, { "@id": "https://mechatronicssystems.com/#defaultLogo", "@type": "ImageObject", "url": "https://mechatronicssystems.com/images/design/og-logo.png", "width": 1200, "height": 630 }, { "@id": "https://mechatronicssystems.com/#defaultPlace", "@type": "Place", "address": { "@id": "https://mechatronicssystems.com/#defaultAddress" }, "geo": { "@id": "https://mechatronicssystems.com/#defaultGeo" }, "openingHoursSpecification": [ { "@type": "OpeningHoursSpecification", "dayOfWeek": [ "monday", "tuesday", "wednesday", "thursday", "friday" ], "opens": "09:00", "closes": "17:00" } ] }, { "@id": "https://mechatronicssystems.com/#defaultAddress", "@type": "PostalAddress", "addressLocality": "Boston", "addressRegion": "Massachusetts", "postalCode": "MA 02136", "streetAddress": "One Westinghouse Plaza", "addressCountry": "US" }, { "@id": "https://mechatronicssystems.com/#defaultGeo", "@type": "GeoCoordinates", "latitude": "42.2442665", "longitude": "-71.131958" } ] } ```