8JSA54.E7028D300-0 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 8JSA54.E7028D300-0 is a synchronous motor from the 8JS Synchronous Motors series. It features flange mounting, a nominal speed of 2750 RPM, and a keyed shaft end. The motor uses a self-cooling method and comes with a standard holding brake providing 14.5 Nm of torque.
Internal Product Review
The 8JSA54.E7028D300-0 is a B & R Automation 8JS Series synchronous motor with self-cooling and flange mounting. The optical EnDat 2.1 multi-turn encoder and ±20 arcsec precision support accurate feedback for demanding motion applications. A 14.5 Nm standard holding brake complements the keyed shaft, making this unit a strong choice for dependable servo performance.
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Product Description:
The 8JSA54.E7028D300-0 is a synchronous servo motor manufactured by B&R Automation as part of the 8JS Synchronous Motors series. It provides closed-loop rotary actuation for automated pick-and-place modules, indexing tables, and conveyor axes where accurate speed and position control are required. The motor is supplied with a flange mounting pattern that simplifies alignment, and its keyed shaft enables direct torque transfer to couplings or gear trains used throughout industrial production machinery.
The power and feedback cables exit through an angled swivel connector, reducing bending stress when the cable track changes direction. Heat is removed through self-cooling, so no external fan or liquid cooling circuit is needed. The rotor can reach a nominal speed of 2750 rpm, making it suitable for axes that require moderate speed and high torque density. Position feedback is generated by an optical EnDat 2.1 multi-turn encoder that provides 2048 measuring lines and maintains an angular accuracy of ±20 arcsec. Motor size 5 and length 4 establish the stack height and flange footprint, allowing the unit to fit compatible 8JS frames. The swivel connector also supports flexible cable routing where installation space near the motor housing is limited.
The encoder provides fine digital granularity with a resolution of 13/12 bits for single-turn and multi-turn position data. It stores up to 4096 absolute revolutions, allowing the controller to retain shaft position after a power loss without requiring a homing cycle. A permanently engaged brake rated at 14.5 Nm holds vertical or suspended loads when the drive is disabled, and this brake is the standard type for the series. Motion is transmitted through a keyed shaft, ensuring positive engagement with couplings during cyclic torque reversal. There is no oil seal on the front end, so the motor should be installed in a clean environment or paired with an external sealing element when fluids are present. The flange interface supports rigid attachment to a machine frame or gearbox while maintaining alignment between the motor shaft and the connected load.
