We have a hydroulic 3 jaw chuck make SAMCHULLY HC-21 of size Ø530mm. Serration Pitch 3.0X60° Jaw dimentions Length 180X hieght 65 X width70 mm T slot 25X9mm depth. Two clamping holes Ø21.0 through & Counter Ø32X45 on CD 60mm. First hole 40mm from one side