Product Description:

The 8JSA65.EB025D000-0 is a synchronous motor produced by B & R Automation within the 8JS Synchronous Motors series. It serves as a rotary actuator for automated machinery where closed-loop speed and position control are required. The unit interfaces with servo drives for coordinated motion in positioning and speed-regulated applications. Because it is delivered without a holding brake, the load must be secured by drive torque or an external mechanical device when power is removed.

Rated for a nominal speed of 2500 rpm, the motor can support medium-throughput axes without exceeding its thermal limits under normal operating conditions. Heat is removed by a self-cooling design that relies on the rotor fan effect, so no external blower is needed. Installation uses flange mounting, and the power and feedback leads exit through an angled swivel connector that helps with cable routing in confined spaces. Position feedback is handled by an Inductive EnDat 2.1 encoder with an accuracy of ±180 arcsec, while the 19/12-bit resolution provides separate fine and coarse data for precise servo control. The motor is designated as size 6 with a length index of 5, giving it a compact form factor relative to its torque class, and the shaft area is intended for clean mounting environments because no oil seal is fitted.

The encoder can store up to 4096 turns of shaft travel, and its multi-turn capability allows the drive to report absolute position after power is restored without requiring a homing routine. The output end uses a smooth shaft, allowing couplings or pulleys to be fitted without the stress concentrations associated with a keyway. This shaft style is commonly paired with clamp-type hubs that rely on frictional locking rather than keyed engagement. The absence of a shaft oil seal means the motor should be installed where lubricant splash is not present at the output end.