PS3090KN002 is an NSK Megatorque PS Series (PS3 mid size) direct-drive motor. PS3 is the mid size of the PS series (dia. 150 mm) with four heights covering 15–90 N·m.
Why zero-backlash direct drive: Megatorque motors drive the load directly without gears or belts — no backlash, no wear parts, no accuracy degradation over time, fast settling, low noise and maintenance-free. The large hollow bore (56 mm on this model) passes cables, piping or laser paths straight through, simplifying machine design. Widely used in semiconductor/electronic-component inspection, vision processing and rotary indexing stages.
Key specs: maximum output torque 90 / 90 N·m (rated 30 / 30 N·m), max speed 5 / 1.5 s⁻¹; a built-in absolute position sensor (2,621,440 count/rev) delivering ±2 arc-sec repeatability and 60 (±30) arc-sec absolute accuracy; allowable axial load 2,000 N, allowable moment load 42 N·m, mass 13.8 kg. Pairs with the EDD driver unit series (100–240 VAC per the NSK pairing table). See the attached official catalog for dimensions and speed–torque characteristics.
Same-series part numbers: PS3015KN002, PS3030KN002, PS3060KN002.
Sizing & Integration Support
Direct-drive motor sizing involves the inertia ratio (load inertia / rotor inertia) and the motion profile against the speed–torque curve. Add your load conditions (inertia, motion angle, cycle time, mounting orientation) to the inquiry cart — the Nahshon engineering team will help you select the right model and confirm specs, quotation and delivery with NSK.
