Product Description:

The R43HCNA-NP-RW-VS-02 is a servo motor manufactured by Pacific Scientific as part of the R Servomotors series. This brushless unit is intended for closed-loop motion axes in automated packaging, material handling, and electronic assembly equipment where accurate velocity and torque regulation are required. Its design allows direct coupling to gearboxes or load shafts so that the drive amplifier can command position or speed without the mechanical backlash common to belts or screw transmissions.

During continuous operation, the motor can deliver 3.9 Nm of stall torque, giving the axis enough holding force to maintain position against static loads without overheating. For short transients, it reaches a peak output of 10.4 Nm, allowing acceleration of moderate-inertia payloads before the drive returns to steady-state operation. The high-speed winding is tuned for a rated velocity of 3700 rpm, so the controller can issue rapid indexing cycles while remaining within voltage limits. Rotor inertia is 0.22 kg·m² × 10⁻³, a value kept low to improve dynamic response and minimize settling time. Mechanical attachment is simplified by the NEMA face mounting pattern, which aligns directly with standard gearheads and motor brackets.

The square housing measures 4.25 inches on each side, yet the stack length is only 3 inches, so the motor fits enclosures with limited axial space. Rare-earth samarium cobalt magnets increase flux density, supporting the unit’s torque range while keeping thermal drift low. It is supplied without a brake, so any power-off holding function must be provided by the drive or an external lock. A Viton seal at the shaft exit forms the motor’s primary barrier against contaminants; the material resists lubricants and elevated temperatures better than general-purpose elastomers, and the motor uses a Viton shaft seal. The motor uses standard housing construction and does not include primary feedback.