8JSA42.EB035D000-0 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 8JSA42.EB035D000-0 is part of the 8JS Synchronous Motors series and features a flange mounting style with a smooth shaft end. This synchronous motor has a nominal speed of 3500 RPM, utilizes self-cooling, and includes an inductive EnDat 2.1 multi-turn encoder system with a resolution of 19/12 bits and 4096 revolutions.
Internal Product Review
The 8JSA42.EB035D000-0 is a B & R Automation 8JS series synchronous motor with self-cooling and flange mounting. An inductive EnDat 2.1 multi-turn encoder supports accurate feedback and dependable motion control. Nominal speed reaches 3500 RPM, making this motor a strong choice for precise high-speed servo applications.
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Product Description:
B&R Automation manufactures the 8JSA42.EB035D000-0 for its 8JS Synchronous Motors series. The motor acts as a direct-drive element in automated machinery, delivering precise velocity and position control when paired with a compatible inverter. It has motor size 4 and length code 2, providing a moderate axial length for installations with limited space. A smooth shaft end permits backlash-free clamping to gearboxes or pulleys. The motor is supplied without a holding brake, so static load retention must be provided by external mechanics or drive torque when the axis is stationary.
The unit reaches a nominal speed of 3500 rpm while relying on a self-cooling housing that dissipates heat by natural convection without forced airflow. An integrated feedback package based on the inductive EnDat 2.1 protocol transfers position data digitally to the controller. The encoder provides a single-turn resolution of 19/12 bits for signal and measurement data. Its absolute accuracy is ±180 arcseconds, supporting precise position feedback for tightly regulated servo loops. Multi-revolution tracking extends across 4096 turns, allowing the axis to report its absolute position after a power cycle without requiring a homing routine. This feedback arrangement supports controlled positioning in machinery that must resume operation from a known axis location.
The encoder is classified as multi-turn, so it retains an absolute count across multiple shaft revolutions through its internal gearing and electronics rather than an external battery. Cabling exits through an angled swivel connector that can be rotated during installation, reducing cable strain and accommodating different routing directions within the machine frame. Mechanical attachment uses a flange-mounting interface that follows an IEC layout, simplifying alignment with planetary gearheads or cast machine plates. The output shaft does not include an oil seal. As a result, the motor should be installed where pressurized coolant or lubricants cannot travel along the shaft and enter the front bearing. Proper shielding around the coupling area can also help prevent direct exposure to process fluids without changing the motor interface.
