BSM-Series of Brushless Servo Motors

BSM-series of brushless servo motors offer powerful eight pole (40 x 40mm, 60 x 60mm and 80 x 80mm) motors. These servo motors are custom engineered for high speed, high torque applications that involve dynamic load changes while in a smaller envelope and at a lower cost.

  • CE listed and UL approved
  • Higher Speeds
  • Longer Life
  • Cleaner Operation
  • Higher Duty Cycles
Other Controls & Motors

BSM-Series of Brushless Servo Motors Features & Benefits

Servo Motors

NUTEC BSM series of brush-less servo motors have been custom engineered to offer higher performance in a smaller envelope and at a lower cost than standard off-the-shelf brushless servo motors. Powerful eight pole (40, 60 and 80mm SQ size motors) with rare earth magnets and skewed windings to reduce cogging, and class 3 ABEC bearings provide high speed, high torque, long life, and very smooth low speed operation, features required in complex servo systems.

Brushless servo motors are a class of servo motors that operate by using electronic commutation rather than electromechanical commutation as used in brush-type motors. Brushless motors have a permanent magnet rotor and the wound stator is on the outside allowing for greater heat dissipation. As electronic commutation is a function of rotor position there are no brushes to wear out, limit speed, cause electrical noise, or create contamination.

Features & Benefits

  • Rare earth Neodymiumboron – iron magnets
  • Peak torque to 850 oz-in.
  • IP65 sealing
  • High-flex cables
  • Protection from overheating
  • Optional encoder
  • Optional fail-safe brake


DB25M Motor   DB25M Encoder
Pin Function   Pin Function
1 Motor T   1 Encoder +5VDC
2 Motor S   2 Ground
3 Motor R   3 Channel A+
4 Motor Ground   4 Channel B+
      5 Channel C+
      9 N/C
      11 Hall V
      15 Shield
      16 Channel A-
      17 Channel B-
      18 Channel C-
      19 N/C
      21 N/C
      23 Hall U
      24 Hall W
      Case Shield

Mechanical Interface

BSM40-45, 40 x 40mm SQ

BSM60-45, 60 x 60mm SQ

BSM60-175, 60 x 60mm SQ


Discuss your needs with a Nutec Engineer

BSM-Series of Brushless Servo Motors Specifications

Model BSM40-45 BSM60-45 BSM60-175 BSM80-275
Motor Frame Size, SQ 40 x 40mm 60 x 60mm 60 x 60mm 80 x 80mm
Motor Power 100 Watts 100 Watts 200 Watts 600 Watts
Continuous Stall Torque 0.3 N-m 0.3 N-m 1.3 N-m 2.0 N-m
Peak Torque 1 N-m 1 N-m 2 N-m 6 N-m
Continuous Current 1.4 Amps 1.6 Amps 1.6 Amps 3.6 Amps
Peak Current 4.1 Amps 4.9 Amps 4.9 Amps 10.7 Amps
Torque Constant (Kt) 0.25 N-m/A 0.21 N-m/A 0.42 N-m/A 0.55 N-m/A
DC Resistance (Ra) 6.9 ohms 2.5 ohms 4.2 ohms 1.4 ohms
Inductance 6.7 mH 7.4 mH 15.2 mH 9.2 mH
Back EMF 13Vrms 14Vrms 30V 35V
Motor only (See stage)
Maximum Speed, Rated 3000RPM
Bus Voltage 320VDC
Cable Length 10ft
Motor Connector DB 15 Male
Encoder Connector DB 25 Male
Rotary Encoder Data BSMxx-xx-250
Encoder Lines 2500/rev
Encoder Counts 10000/rev
Home Index 1 per rev
Max. RPM 2500 RPM
Supply Voltage 1+5VDC regulated ±5%
Output 4 channel TTL Square Wave
Option BSMxx-xx-xxx-BAK
-BAK Fail-safe brake

About Us

NUTEC Mechatronic Systems' positioning is based on perfection. Engineering and design are focused on details and balanced design, flawless fabrication and precision machining to exacting standards and consistent quality.

Nutec Components
81 Jefryn Boulevard East
Deer Park, NY 11729

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  1. Monday-Friday: 7:30am to 4:00pm
  2. Weekends: Closed

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