Why electric hammer drill points round handle handle
The small diameter drill has a high rotational speed and a small torque, so it can only be loaded with a chuck. Large diameter, low speed, large torque, with sleeve clamp, centering accurate, good torque. Not easily eccentric and broken. Because drilling is greater than the straight drill volume, higher manufacturing cost, better accuracy. The same diameter drill bit, drilling at least expensive 20~40%.
The drill chuck is drilled and clamped with the three edge of the chuck. Drilling with Mo type clamping sleeve, grinding paint produced by clamping and centering taper. In general, small diameter with straight drill, and then through the reducing sleeve to connect machine tools. Large diameter drilling, can be installed directly to the lathe bed or drilling spindle.
Handle: general domestic electric hammer are square handle;Round handle: fit in the imported machine with a hammer.All of the bits are divided, called straight drill and drilling accuracy.
