You'd better have a hand drill at home. When operating, we need to be equipped with different drills. We can change the chuck. It's easier to change the bit. How to change the whole chuck with a hand drill?
1 First of all, you need to prepare tools and a chuck. Turn the chuck upside down. All three claws should be retracted into the hand drill. There are screws on the shaft to fix the chuck.
2. Unscrew the screw, unscrew the shaft of the hand electric drill with a wrench, clamp the drill bit and then reverse it, all of which are retracted, so that the replacement can be successful. If there is no chuck fixing screw, you can fix it with a wrench, so it will be very easy to change the chuck.
Second, what are the common faults and maintenance methods of hand electric drills?
Hand drill is a tool that we often need in our life. It is a common electric tool. What should you do if it suddenly breaks down while you are using it?
The most common fault of hand drill lies in its motor and armature winding. The following are some common faults and their maintenance methods.
1, motor fault maintenance
Motor failures are often manifested as: after electrifying, the motor does not respond, resulting in the electric drill not working normally, or the motor turns slower and slower, resulting in the impact of the hand electric drill being reduced and unable to work normally. In addition, the motor fault is also manifested in the noise when the motor is working, and the electric drill can't stop shaking. All these will make the hand drill malfunction and affect its normal work.
(1) The motor can't work normally. Disassemble the body of the electric drill and check whether the fuse is blown or the power cord is blown. If this problem occurs, replace the fuse or power cord immediately; It is also possible that the armature winding or stator winding is damaged, so the winding must be replaced or repaired; It is also possible that the bearing is rusted, so the bearing should be lubricated or derusted.
(2) The motor speed is slow, which is caused by serious brush wear and should be replaced immediately.
(3) The noise of the motor is too large, which is caused by the abrasion of the brush or bearing, so it is necessary to replace the brush and bearing.
2. Maintenance of armature winding
Armature winding is a very important part in hand drill, and its damage will lead to the failure of hand drill. Common faults are short circuit and armature winding short circuit.
(1) The armature winding is short-circuited, because the insulation surface of adjacent coils in the armature winding is damaged, so that the coils cannot be energized, which affects the normal work. Therefore, when it is found that the coil is damaged or the insulation material on the turn surface is damaged, the coil should be replaced in time to keep the armature winding working normally.
(2) The problem of armature winding short circuit is more complicated than that of short circuit, because the short circuit can be judged by whether the insulation material of the coil surface turns is damaged, but the open circuit problem cannot. We can test it with a universal measuring instrument. If the resistance between the two commutators is greater than the normal parameters, there must be an open circuit between the coils between the two commutators, and the coil between them should be replaced immediately.
The above is about the fault analysis and simple maintenance methods of hand electric drill, hoping to help readers.