Product Description:

The F43HENA-R4-NS-NV-00 is a brushless servo motor manufactured by Pacific Scientific as part of the F Servomotors series. In automation cells, it serves as a rotary actuator that delivers precise position and velocity control to connected load fixtures. This model follows the standard motor configuration used in the series, has a magnet stack length of 3, and is supplied without a holding brake, so mechanical locking must be handled externally when power is removed. It is built for installations that use English mounting and shaft dimensions, and it ships with no secondary feedback device because the drive already provides primary resolver feedback.

At a continuous stall torque of 32 lb-in, the motor can hold static loads without motion while maintaining rated temperature rise. During short-term acceleration or shock events, it develops up to 81 lb-in of peak torque, giving machine axes the overhead needed to overcome inertia and friction. A torque constant of 5.4 lb-in/A links the commanded current from the drive to mechanical output, and a voltage constant of 64 V/Krpm indicates the back EMF the drive must overcome as speed increases. The 4.25-inch frame width sets the lateral envelope so the motor fits into compact assemblies and aligns with standard gearboxes.

With a mass of 16.6 lbs, the rotor-stator assembly adds moderate inertia to the axis while keeping installation handling reasonable. The IP65 enclosure protects internal windings from dust and low-pressure water jets, which is important when the motor is installed near coolant spray or airborne particulate. Its magnets are made from Ferrite, providing stable flux density across a wide temperature range. Because there is no shaft seal, the front bearing region remains open, so any liquid exposure must be directed away from the output shaft by external machine guards.