TOPCHANCES 400W CNC Spindle Motor DC 12-60V Aluminum Alloy Milling Motor ER11 + Mach3 PWM Speed Controller with Mount 3.175mm 12000r/min 1. Applies to DC12-60V low voltage permanent magnet brushed DC motor 2. Operating Voltage: Wide Voltage (DC) DC12V-DC60V (Max 65V) 3. Control power: 12V 120W, 24V 240W, 36V 360W, 48V 480W, 60V 600W 4.Dimensions: Length 75mm * Width 75mm * high 42mm 5.Soft-start function. Prevent excessive current caused by the motor and power damage (default 0 seconds soft start), 0-5 seconds adjustable