Product Short Description
Product Name: B&R 8MSA4X.R0-67 Synchronous Three-Phase Servo Motor (8MSA Series, Size 4, X-Stack)
Product Introduction: Higher-power Size 4 variant of the 8MSA family with extended “X” stack, absolute multiturn feedback and resolver-type R0 excitation. Targets mid-power feed axes and robot joints needing 8 Nm-class continuous torque.
Technical Specifications:
- Rated power: 1.37 kW
Description
- Rated torque: 8.5 Nm
- Peak torque: 38 Nm
- Rated speed: 3000 rpm
- Max speed: 6000 rpm
- Voltage: 400 V class
- Rated current: 3.47 A
- Feedback: absolute multiturn encoder (R0-67 listing indicates resolver-compatible connector layout; some distributors list absolute multiturn — confirm exact feedback chip with B&R order code)
- Cooling: natural convection
- Protection: IP65
- Connectors: plug-type SpeedTEC
Functional Features: High peak/continuous torque ratio for aggressive acceleration; multiturn absolute feedback retains position across power loss; IP65 for coolant and swarf exposure; ACOPOS ecosystem integration.
Application Scenarios: Robot arm joints, CNC feed drives, press transfer axes, palletising gantries, print cylinder drives.
Material & Structure: Aluminium frame, rare-earth magnet rotor, finned self-cool housing, sealed bearings, rear absolute encoder or resolver module depending on sub-code.
Working Principle: PMSM with FOC from ACOPOS; absolute encoder (or resolver) provides commutation and position; drive closes cascaded position/speed/torque loops at sub-100 µs cycle.
Installation Requirements: Size 4 B5 flange; adequate convection clearance; shielded cables; verify feedback type matches drive option (EnDat/Hiperface vs resolver).
Usage Notes: 38 Nm peak is transient only; 6000 rpm is mechanical maximum, not continuous; confirm encoder variant before swapping into an existing axis to avoid commutation faults.
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