Features: The housing is made of Metal with precise molding and a sturdy structure. Pure copper coils offer low current, high efficiency, and high output power. Excellent heat dissipation performance, with a fan for effective cooling and stable performance. It is the perfect replacement for damaged or rusted motors in power tools. Easy to operate, it can be conveniently fixed from the front with two M3 screws. Suitable for electric chainsaws, reciprocating saws, chain saws, cordless hand saws, etc. Model: RS550 Voltage: 18V No-load speed: 25000 RPM No-load current: 1.2A Operating current: 7.5A Torque: 442g/cm Output power: 98.6W Type: mini Motor Commutation: Brush Product Name: RS550 Mini DC Motor Shaft diameter: 3.2mm Shaft length: 75.1mm Output shaft length: 12mm Diameter: 37.2mm Gear diameter: 8.2mm Gear thickness: 6.8mm Mounting hole spacing: 25mm Color: Silver Material: Metal Package Contents: 1 x Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.