Product Description:

The R88SENA-R2-NS-NV-03 belongs to the R Servomotors series produced by Pacific Scientific. It is a brushless AC servo motor intended for closed-loop positioning and speed control in automated machinery, where accurate torque delivery and responsive operation help synchronize mechanical axes and tooling. This type of motor is suited to servo loops that need repeatable motion during indexing, speed changes, and position holding. Secondary feedback is not provided, which keeps the wiring arrangement straightforward.

This model supplies a continuous stall capability of 42.2 Nm, so it can hold that torque without overheating under rated conditions, while short bursts up to 86.1 Nm support acceleration peaks and transient load changes. A square mounting frame that measures 7.5" square allows direct interchange with legacy 190 mm class motors. Rotor inertia is 8.61 × 10⁻³ kg·m², which balances quick acceleration with stable speed in systems that start and stop frequently. The magnetic circuit uses rare-earth samarium cobalt, giving high energy density and good temperature tolerance, while the standard sealed aluminum housing supports natural convection cooling. English-pattern face holes also simplify attachment to either metric or imperial gearboxes.

A stack length of 8 inches keeps the active laminations within common cabinet depths, and the primary feedback device is a frameless resolver size 21, chosen for resistance to electrical noise and mechanical shock. The motor uses an English mounting flange, and it has no shaft seal, so the application must prevent fluid ingress at the coupling. The resolver arrangement supports dependable feedback in demanding industrial environments, and the unit is supplied without a holding brake, which suits systems that rely on drive torque to hold position after power removal.