The difference between left and right drills used to drill holes
Difference upstairs has been said, the drill designed to be right-handed, there are 1 reasons, the main direction of the motor. 2 because of the relationship between the centrifugal force, designed to turn right, more labor-saving. Taps are designed solely for ease of use
If the twist drill is said to be left-handed or right-handed, this is related to the direction of rotation of the spindle. Regular drilling machines use the right-hand bit; in some special cases, the main axis of the drilling machine rotates opposite, and the left-hand drill is required.
The use of left-hand drill, mostly because the machine tool design can not meet the needs of the right-hand bit, as some spindle can not meet the right-hand thread, you must use the left-hand thread. The specific situation is not practical, it is difficult to say too clear.
There are very few places to use left-hand drills:1, the modular machine tool porous drilling gearbox design, due to local restrictions can not change the direction of the wheel, only left-handed drill.2, when the attack left hand thread need to drill hole, plane moment is easily broken by alternating reverse gear, left-hand drill.3, drilling thin-walled parts will appear spiral line, can be left hand bit repair.4, some of the spindle is subject to restrictions, can not use the right-hand bit.
