R43HEBA-R2-NS-VS-02 Pacific Scientific
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The Pacific Scientific R43HEBA-R2-NS-VS-02 is a servo motor from the R Servomotors series with a 4.25 inch square frame size and a standard housing style. It provides a continuous stall torque of 3.9 Nm, a peak torque of 10.4 Nm, and features a rated speed of 3700 RPM. The motor uses rare earth samarium cobalt magnets, includes a Viton shaft seal, and has a 100V DC holding brake.
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Product Description:
The R43HEBA-R2-NS-VS-02 servo motor is produced by Pacific Scientific as part of the R Servomotors series. Designed for closed-loop motion axes in industrial automation, this brushless unit converts commanded current into rotary motion with consistent torque and speed control. When paired with a digital drive, it can position conveyor sections, pick-and-place arms, or indexing tables with repeatable accuracy over frequent start-stop cycles. The motor belongs to the manufacturer’s medium-frame range and suits applications that need moderate inertia and integrated resolver feedback without external transducers.
It delivers a continuous stall torque of 3.9 Nm, so the motor can sustain load without overheating under rated conditions. A peak torque of 10.4 Nm supports rapid acceleration during cycle changes and short bursts of higher demand. The high-speed winding is optimized for operation up to 3700 rpm, letting the drive use a broad velocity range without excessive bus voltage. System responsiveness is improved by a rotor inertia of 0.22×10⁻³ kg·m², so commanded speed changes translate to quick mechanical reaction. Torque density comes from samarium cobalt rare-earth magnets, which resist demagnetization at elevated temperatures. Position data is supplied by a frameless size 21 transmitter-type resolver, and no secondary feedback device is installed. This feedback arrangement gives the controller the rotor angle information needed for commutation and stable speed regulation.
The motor uses a 4.25" square frame with an English mounting pattern, allowing direct fastening to legacy machinery without adapter plates. Its stack length of 3 inches keeps the package short where space around the axis is limited. Motion is protected by a shaft seal made of Viton, which withstands hydraulic oils and coolants in typical industrial environments. When power is removed, a 100 V DC holding brake locks the rotor to support vertical loads or keep the axis stationary at rest. A standard housing style supports convection cooling and leaves a clear airflow path around the motor body.
