6W-250W three-phase AC gear motors; 220V single-phase variable-speed motors. Motor model 5IK90RGN-CF (90W AC speed-controlled motor). Gearbox model 5GN50KB (reduction ratio 50:1). Power range 6W-400W (this model is 90W). Key features All-copper windings, speed adjustable via a speed controller. Accessories Mechanical speed controller (with speed adjustment knob and switch). 5: 90mm flange series. IK: Induction AC motor. 90: Rated power 90W. R: Speed control function (compatible with speed controller). GN: Standard mounting method. CF: Single-phase capacitor-start motor (commonly 220V). 5: Suitable for motors with a 90mm flange. 50: Reduction ratio of 1:50. KB: Shaft diameter / mounting specification identifier.