B&R 8MSA4L Synchronous Servo Motor

Product Brief Introduction: The B&R 8MSA4L is the long-stack variant of the Size 4 servo motor family. It provides high torque output in a medium-sized package, suitable for main drives in medium-sized machinery where space is limited but power is needed.
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Technical Specifications:
Frame Size: 4
Stack Length: L
Rated Torque: Approx 4.0 – 7.0 Nm range
Peak Torque: High overload capacity
Speed: Up to 6000 rpm
Functional Features:
High torque density.
Excellent thermal dissipation for continuous duty.
Precision feedback for accurate positioning.
Robust mechanical design.
Application Scenarios:
Packaging machine main drives.
Robot arm joints (medium payload).
Machine tool auxiliary axes.
Printing rollers.
Performance Parameters:
Torque constant: High.
Electrical time constant: Low for fast current control.
Structural Characteristics:
Size 4 flange dimensions.
Extended body length for L-stack.
Heavy-duty bearings.
Working Principle:
PMSM operation with extended stator/rotor stack to increase torque linearly with length.
Installation Requirements:
Support the motor weight if mounted horizontally with a long overhang.
Ensure coupling alignment is precise.
Usage Notes:
Monitor temperature if running near peak torque continuously.




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