8JSA44.EA040D100-0 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 8JSA44.EA040D100-0 is a synchronous motor from the 8JS Synchronous Motors series with a flange mounting style and a keyed shaft end. It features a nominal speed of 4000 RPM, a self-cooling method, and uses an inductive EnDat 2.1 single turn encoder with ±180 arcsec precision. The motor has an angled swivel connector and does not include a holding brake or oil seal.
Internal Product Review
The 8JSA44.EA040D100-0 is an 8JS series synchronous motor with self-cooling for efficient continuous operation. An inductive EnDat 2.1 single-turn encoder provides clean feedback for motion control tuning. Flange mounting and a keyed shaft make the unit especially practical for precise servo integration.
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Product Description:
The 8JSA44.EA040D100-0 is a synchronous motor manufactured by B & R Automation for the 8JS Synchronous Motors series. It is intended for precision positioning and speed control in automated machinery, where accurate torque delivery is required on production lines and in assembly cells. Its compact housing allows installation on machinery with limited space while supporting controlled rotary motion for fast, repetitive processes.
This model reaches a nominal speed of 4000 rpm, enabling direct coupling to fast-cycling axes without intermediate gearing. Heat is removed through self-cooling, so no external blower or liquid cooling circuit is necessary. Position feedback comes from an inductive EnDat 2.1 encoder that delivers absolute position data to the connected drive. Its resolution is 19/0 bits for single-turn and multi-turn data, respectively, providing a detailed position word for precise velocity and position control. Static accuracy remains within ±180 arcsec, limiting position error during repetitive movements. The encoder provides absolute information after power-up, allowing the drive to determine the shaft position without performing a homing cycle.
Power and feedback conductors exit through an angled swivel connector, which can be oriented to clear nearby components and simplify cable routing in compact installations. A flange mounting face with size-4 geometry secures the housing to a machine plate or compatible gearbox. The motor has a frame length code of 4, providing a balance between torque capacity and axial footprint. Rotary power is transmitted through a keyed shaft, which provides positive engagement with pulleys, couplings, or gearboxes. The feedback device uses a single-turn architecture and reports the absolute shaft position over one mechanical revolution. The unit is supplied without a holding brake, so an external brake or drive-generated torque is required when a stationary load must be retained. The shaft does not include an oil seal, so external sealing is necessary when the installation requires protection against lubricant migration or contaminants near the shaft opening.
