33VM62-108-7 by Pacific Scientific

The Pacific Scientific 33VM62-108-7 PMDC motor from the Low Inertia PMDC Servomotors Series delivers a compact, high-performance solution for precision industrial automation. Engineered for applications that demand rapid acceleration and deceleration, this motor features a 156 watts power rating and operates at a 30 V rated voltage, providing a 30 oz-in rated torque with exceptional repeatability. Its 0.00056 oz-in-sec² rotor inertia ensures minimal energy storage in the rotating assembly, enabling tight speed and position control. Constructed with corrosion-resistant stainless steel and high-energy permanent magnets, the 33VM62-108-7 offers robust mechanical durability and long service life. Designed for seamless integration, it supports both rear-mounted tachometers and encoders for closed-loop feedback in advanced servo architectures.

Detailed electrical and mechanical specifications have been optimized for demanding industrial environments. The motor’s torque constant of 8.0 oz-in/amp yields predictable torque per unit current, while its terminal resistance of 1.29 ohms and rated current of 5.2 amps (RMS) deliver efficient power conversion. Precision sealed ball bearings ensure low friction and longevity, and the overall weight of 1.2 kg supports lightweight system designs. The compact housing measures 120×80×60 mm and accommodates ambient temperatures from –10°C to 60°C without performance degradation. The combination of field replaceable carbon brushes with a first-set service life of 5000 hours and identical life expectancy for the second set minimizes downtime and maintenance costs.

Operational performance is further enhanced through a low-inertia hollow rotor design that minimizes energy loss and supports high rotational speeds. When continuous torque demands exceed nominal limits, the integrated forced air cooling provisions can boost torque capacity by up to 200%, extending the motor’s duty cycle capabilities. The sealed bearing system, combined with stainless-steel end bells, protects internal components in dusty or humid environments common in industrial settings. Rapid dynamic response is assured by the motor’s low electromagnetic time constant, enabling precise torque control for profiling applications. These features collectively yield superior acceleration, minimal overshoot, and consistent performance under variable load conditions.

System integration into larger automation frameworks is streamlined by standardized mounting provisions and compatibility with popular servo drives. Rear-mounted tachometer and encoder flanges allow for direct coupling to feedback devices without additional adapters. The 33VM62-108-7 is suited for robotics, CNC equipment, packaging machines, and other precision servo applications where compact size, high torque density, and responsive control are critical. Its combination of reliability, serviceability, and performance makes it an ideal choice for next-generation industrial automation systems.