Impact drill has 5 pits in 4 pits. What do you mean?
The impact mechanism of impact drill with ball type two and type. A ball impact electric drill consists of a moving plate, a fixed plate, a steel ball and so on. Brake disc is connected with a main shaft through threads, and with 12 balls; fixing by pins fixed on a casing, and a 4 ball, in the role of thrust, 12 ball 4 ball rolling along, the hard alloy bit to produce rotary impact motion, can drill a hole in the brick, brick, concrete and other brittle materials. The utility model can make the fixed disk rotate with the moving disk without impacting, and can be used as an ordinary electric drill.
Percussive drills work by rotating and impacting. Percussive drills work by rotating and impacting. A single shock is very slight, but a shock frequency of more than 40000 minutes per minute can produce continuous force. Used of natural stones or concrete. The impact of drilling work in a drill chuck adjustment knob, adjustable normal electric drills and impact drills in two ways. But the impact of drilling is the use of internal gear to achieve mutual beat of impact, but the impact is far less than the hammer. It is not suitable for reinforced concrete drill.
The impact bit has 4 pits with 5 craters, all of which are the grooves at the end of the bit and the percussion drill. According to the different types of impact drill, the drill will be good, four pits, round four edges. Different types of impact drills use different drill types.
