Hand drill and rechargeable flashlight, which household is good?
Household generally buy about one hundred is enough. I work one hundred hours a day. Considering the household is not used every day, bought a waste of ah.
A ball impact electric drill consists of a moving disk, an impact drill, a fixed plate, and a steel ball. 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 drilling is better. The impact of drilling work in a drill chuck adjustment knob, adjustable normal electric drills and impact drills in two ways. The impact mechanism of impact drill with ball type two and type.
