8JSA42.R0035D000-0 B & R Automation
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The B & R Automation 8JSA42.R0035D000-0 is part of the 8JS Synchronous Motors series and features a flange mounting style with a motor size of 4 and motor length of 2. This synchronous motor comes with a self-cooling method, operates at a nominal speed of 3500 RPM, and has a smooth shaft end. Its connection uses an angled swivel connector and it is equipped with a resolver encoder system providing 10 angular minutes of accuracy.
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Product Description:
The 8JSA42.R0035D000-0 is a synchronous motor manufactured by B&R Automation and offered within the 8JS Synchronous Motors series. Serving as the mechanical output stage of a servo axis, it transforms controlled current from an inverter into angular displacement for conveyors, gantries, or rotary actuators that require repeatable motion profiles on the factory floor. Its compact geometry and resolver feedback channel provide the drive system with position data and high loop bandwidth, enabling accurate speed and torque regulation in automated machinery. The motor can support controlled positioning and continuous rotary motion when paired with a compatible servo drive.
Rated for a nominal speed of 3500 rpm, the rotor can maintain this target velocity under continuous load, aligning electrical frequency with mechanical output for mid-range indexing cycles. Position feedback has an accuracy of 10 angular minutes, allowing the control system to detect the shaft angle within that range before converting the signal to digital position data. The feedback element is a resolver, which provides reliable operation under vibration and changing temperatures. Power and signal lines exit through an angled swivel connector, so the cable assembly can be rotated to relieve strain in tight enclosures. Rotor heat is dissipated through self-cooling, with the housing surface transferring heat directly to the surrounding air without external fans or liquid cooling circuits.
A flange mounting pattern centers and secures the stator without separate mounting feet, allowing axial alignment with gearboxes or direct-drive loads. The motor has a size 4 frame, which provides a compact footprint for installations with limited space. Its length 2 magnet stack balances continuous torque with the overall motor depth. Output torque is delivered through a smooth shaft, enabling low-backlash coupling with clamping hubs or shrink discs. The smooth surface also allows the connected hub to be positioned without relying on a keyed interface. Because the motor has no integrated brake or oil seal, the application must provide external holding or sealing components when those functions are required.
