8MSA5L.R0-B4 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 8MSA5L.R0-B4 is part of the 8MS Three Phase Synchronous Motors series and features a motor size of 5 with an L length. This self-cooling motor uses BRX resolver encoder technology and has a smooth shaft end. It is rated for a nominal speed of 3000 rpm and has a relative rated torque classified as large.
Internal Product Review
The 8MSA5L.R0-B4 is a B & R Automation three-phase synchronous motor with self-cooling. Resolver feedback with ±1 angular minute non-linearity supports accurate commutation and stable positioning. Rated for 3000 rpm, the motor is an excellent fit for precise high-speed servo duty.
To contact sales for pricing and lead time:
Payment Methods
Shipping Methods
Our Credentials
Product Description:
The 8MSA5L.R0-B4 is a three-phase synchronous motor produced by B & R Automation as a member of the 8MS Three Phase Synchronous Motors series. It is intended to drive axes in machines that require consistent torque and precise electronic commutation. Within an automation cell, the unit converts electrical energy from the inverter into mechanical rotation that can be coupled directly to gearboxes, ball screws, or belt transmissions for coordinated motion control. Its synchronous design allows the connected inverter to regulate speed and torque in response to commands from the machine controller.
This model operates at a nominal speed of 3000 rpm, providing a suitable operating point for high-speed motion applications. Heat is removed solely through its self-cooling design, so no external fan or liquid circuit is necessary for temperature management. Power and feedback conductors exit on side B, simplifying cable routing when the motor is mounted against a machine frame. Rotor position is reported by a resolver, enabling sinusoidal current control even in areas with high electromagnetic noise. The unit is supplied without a holding brake; therefore, applications that must secure a vertical load during a power loss require an external mechanical lock or holding torque from the drive.
The stator uses the motor size 5 envelope and has a length index of L, which provides an extended stack for higher continuous torque. Feedback linearity is precise, with resolver nonlinearity limited to ±1 angular minute and overall resolver accuracy of ±10 angular minutes, supporting fine position control when paired with a compatible digital drive. The resolver uses the BRX designation for its feedback configuration. A smooth shaft is supplied, so torque is transferred through an interference-fit coupling or compression hub. The shaft does not include an oil seal, so the installation must protect the motor from direct coolant spray and lubricant ingress. Proper coupling alignment helps prevent excessive radial loading on the shaft and supports stable operation in coordinated motion systems.
