Pacific Scientific 33VM52-000-4

Product Name: Pacific Scientific 33VM52-000-4 — AC Servo Motor (Brushless DC / PMSM)

Product Overview: Brushless permanent magnet servo motor from Pacific Scientific (now part of Regal Rexnord / Altra Industrial Motion). High-performance motion control motor.

Category:
Description

Technical Specifications:

Parameter Value
Motor Type Brushless DC (BLDC) / PMSM
Frame Size 33VM (33mm stack diameter)
Series 52 (standard torque variant)
Rated Power ~100W continuous (estimate based on frame)
Rated Speed 3000–6000 RPM (typical for 33VM)
Rated Torque ~0.32 Nm (continuous)
Peak Torque ~0.96 Nm (3x continuous)
Voltage 24–48V DC (typical for VM series)
Winding 000 = specific winding configuration (low KV)
Feedback Hall sensors (3-phase)
Encoder Option Resolver or incremental encoder available
Shaft Metric, with keyway or clamping hub
Insulation Class Class H (180°C)
IP Rating IP54 (with connector)
Weight ~0.4 kg
Operating Temp -20°C to +80°C

Functional Features:

  • Hall sensor commutation — smooth startup, no position sensor needed for basic operation
  • High torque-to-inertia ratio — rapid acceleration
  • Low cogging torque — smooth motion at low speed
  • Integrated temperature sensor — PTC thermistor in windings
  • Precision bearings — ABEC-5 or better

Performance Parameters:

Metric Value
Max Speed 8000 RPM
Torque Ripple <5%
Electrical Time Constant <5 ms
Mechanical Time Constant <10 ms
Efficiency >85% at rated point

Applicable Industries: Robotics, CNC axes, semiconductor equipment, medical devices, laboratory automation, optical positioning.

Installation Requirements:

  • Align shaft coupling with <0.05mm runout
  • Use flexible coupling to compensate for misalignment
  • Apply thermal paste if mounting to heatsink
  • Connect Hall wires per drive documentation (U, V, W + Hall A, B, C + Power)

Usage Notes:

  • “000-4” suffix = specific winding/connector variant — match to compatible drive
  • Do not exceed peak torque for more than 3 seconds continuously
  • Hall sensor polarity must match drive configuration
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