Product Description:

The R46HENA-TS-NS-NV-00 is a servo motor produced by Pacific Scientific and supplied within the R Servomotors series. As a rotary actuator, it converts electrical energy into mechanical motion to drive positioning axes, indexing tables, and other automated machinery in industrial environments. It is intended for controlled motion applications where accurate rotary output is required.

The motor delivers a continuous stall torque of 7.6 Nm, allowing it to hold loads steadily without overheating when locked at zero speed. During acceleration or short overloads, it can reach a peak torque of 20.2 Nm, supporting fast indexing cycles. Its frame measures 4.25" square, so it fits equipment designed around NEMA-style size 42 mounting patterns. The rotor’s reflected inertia is 0.40 kg·m²×10⁻³, which eases tuning because the value is small compared to many machine loads and therefore reduces servo gain adjustments. A stack length of 6 inches gives the active magnetic core enough axial volume to achieve these torque values while keeping overall weight moderate. The housing uses a standard style without additional cooling fins, and the motor has no integrated brake, so external holding devices must be used when power is removed.

Torque production is reinforced by the use of rare earth (samarium cobalt) magnets that maintain high flux density across a broad temperature band. The phase windings are the High Speed type, balancing voltage requirements with rapid electrical time constants for responsive motion profiles. Primary position and velocity information is supplied by a Tachsyn resolver, and there is no secondary feedback channel, which simplifies cabling for compact installations. Mechanical attachment follows the English mounting format, matching the frame to SAE-style bolt circles on gearboxes or linear stages. Because the unit has no shaft seal, it should be located away from fluid spray zones, and its standard housing should be placed inside a protected cabinet if contaminants are present.