33VM62-000-21 Pacific Scientific
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The Pacific Scientific 33VM62-000-21 is a PMDC servomotor from the Low Inertia PMDC Servomotors series. It features a basket rotor construction and uses sealed ball bearings for durability. The motor is built with Alnico V-7 magnet material and a stainless steel shaft, and is capable of producing up to five times its rated torque.
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Product Description:
The 33VM62-000-21 is produced by Pacific Scientific as part of the Low Inertia PMDC Servomotors series. This direct-current servo unit converts armature current into controlled mechanical motion for positioning tables, pick-and-place actuators, and other industrial axes that need fast acceleration. By combining a light rotor with strong permanent magnets, the motor delivers commanded torque quickly while keeping inertia low, making the model suitable for drive systems that rely on responsive speed and direction changes.
Mechanically, the armature is supported by sealed ball bearings, which limit lubricant loss during continuous duty. Commutation is handled by carbon brushes, so field reversal occurs without external electronics. Magnetic flux is established by Alnico V-7 permanent magnets, which tolerate elevated temperatures without demagnetizing. The torque-producing conductors are mounted on a basket rotor, a configuration that eliminates end turns and cuts rotor inertia because there is no rotating iron in the assembly. Heat is carried away through the frame because the motor has no provision for forced-air cooling. An analog tachometer is not attached, which leaves rear-shaft space available for other feedback arrangements.
During transient moves, the motor can supply 5 times rated torque, giving the drive extra headroom for acceleration or rapid deceleration before thermal limits are reached. A shaft machined from stainless steel resists corrosion in washdown or humid environments and mates directly with pulleys or couplings. Because an optical encoder is not attached, the motor can be paired with resolver, incremental, or absolute feedback that matches the controller. The PMDC motor layout keeps drive circuitry simple because it can operate with a brushed DC amplifier in closed-loop control.
Frequently Asked Questions about 33VM62-000-21:
Q: What type of commutation does the 33VM62-000-21 have?
A: The 33VM62-000-21 uses carbon brushes for commutation.
Q: What type of bearings are used in the 33VM62-000-21 servomotor?
A: This motor is built with sealed ball bearings to help protect the internal moving parts from contaminants.
Q: Is there an analog tachometer attached to the 33VM62-000-21 motor?
A: The 33VM62-000-21 does not come with an analog tachometer.
Q: What material is the shaft of the 33VM62-000-21 made from?
A: This model features a stainless steel shaft for enhanced durability.
Q: Does the 33VM62-000-21 have forced-air cooling provision?
A: The cooling system of the 33VM62-000-21 does not provide forced-air cooling.