Work voltage: 12-48VDC. Spindle motor power: 400W. Insulation resistance:>2Megohm. Dielectric strength:400V. Motor Length : 186mm. Axis collet Length: 48mm. Diameter of Axis collect holder:16mm. Repeat accuracy: 0.01-0.03mm. ER11 spindle motor collect: 3.175mm. Wide voltage PWM DC brush motor speed controllerï¼. Applies to DC12-60V low voltage permanent magnet brushed DC motor. Operating Voltage: Wide Voltage (DC) DC12V-DC60V (Max 65V). A: Default potentiometer control (5K-100K), defaults 10K. B: MACH3 -PWM speed control signal input, external PWM input requirements: level 3.5-12V VPP, frequency 1K-10KHZ, suitable for MACH3 spindle speed control. Rated current: 10A, overload and short circuit protection current 12A. (Over-current cut output, overcurrent indicator flashes, the potential light is off, overcurrent lift). Prevent excessive current caused by the motor and power damage (default 0 seconds soft start), 0-5 seconds adjustable. Control power: 12V120W, 24V240W, 36V360W, 48V480W, 60V600W7. Dimensions: Length 75mm Width 75mm high 42mm 8. Pulse width modulation range: 0% -100%. Note: When using a PWM signal control mode, need to unplug Potentiometer, or it will be unable to use PWM mode. 1 0.4KW spindle motor with with ER11 3.175 collet. 1 Mach3 PWM speed controller. 1 Mount bracket with screws.