The M28-58-BLDC series is a 28mm diameter brushless DC motor with a 58mm body length, designed for applications requiring compact yet reliable brushless performance. This motor platform offers a significant performance upgrade over brushed motors of similar size, providing longer life, higher efficiency, and quieter operation. The combination of 28mm diameter and 58mm length delivers an excellent power-to-size ratio for robotics, medical equipment, industrial automation, and consumer applications where space is at a premium.
The M28-58 delivers rated torque from 0.10 to 0.25 Nm with peak torque up to 0.55 Nm, depending on winding selection. No-load speeds range from 2,000 to 12,000 RPM, allowing designers to optimize for either high-speed or high-torque applications. The 58mm body length delivers approximately 20-25% higher torque output compared to shorter 28mm motors (such as 28×40mm versions) while maintaining the same diameter, making it an excellent choice when additional torque is needed without increasing motor diameter. The brushless design provides high efficiency (up to 85%), reducing heat generation and improving energy economy compared to brushed alternatives.
Unlike traditional metal brush DC motors that require periodic brush replacement and suffer from electrical arcing, the brushless design eliminates mechanical commutation entirely. Typical operational life reaches 15,000+ hours—three times longer than equivalent brushed motors. The absence of brushes also eliminates electrical arcing, reducing EMI and making the motor suitable for sensitive medical and electronic environments. Low cogging torque design ensures smooth rotation even at very low speeds, critical for precision positioning applications.
Three integrated hall effect sensors provide commutation feedback for electronic speed controllers (ESC) and enable precise speed control, direction changes, and smooth starting from zero speed. The hall sensors allow the motor to start reliably under load and maintain stable operation across a wide speed range. For closed-loop speed or position control, an optional magnetic or optical encoder (up to 1,024 PPR) can be added to the motor rear shaft.
The 58mm body length provides adequate surface area for passive heat dissipation in most applications. Double-shielded ball bearings on both ends ensure low friction and long service life even under continuous duty. Dynamic balancing of the rotor assembly minimizes vibration, important for precision applications such as camera gimbals and surgical instruments. The housing can be specified with IP54 protection (dust-protected and water-resistant) for demanding environments. Insulation is Class F (155°C) as standard.
OEM customers can specify winding voltage and speed/torque characteristics, shaft diameter (4mm, 5mm, or 6mm), shaft length, and end configurations including flat, keyway, or D-cut. Gearbox attachments (planetary or spur) with reduction ratios from 3:1 to 100:1 are available for torque multiplication. Custom lead wire length and connector terminations (Molex, JST, or custom) are supported. Encoder integration and electromagnetic brake options are available for volume orders.
Each M28-58-BLDC motor undergoes 100% final inspection including no-load speed, no-load current, hall sensor functionality, insulation resistance, dielectric strength, and vibration testing. Production follows ISO 9001:2015 quality management processes. RoHS and REACH compliance documentation is available. Sample motors with matched electronic speed controllers are available for engineering evaluation.
