Rotor method of electric drill:
Loosen several self-tapping screws or screws outside the electric drill; horizontally lift half of the casing; the structure of the new hand drill is generally semi-embedded, that is, all the machine and electrical components are installed in the other half of the casing;
Carefully remove the carbon brush first, then remove the end of the drill chuck, then gently lift the motor to remove the rotor (do not damage the enameled wire), wipe the commutator on the rotor (the one that is in contact with the carbon brush), if it is too dirty Or if the abrasion is severe, it can be polished with emery cloth and then polished with water sandpaper or metallographic sandpaper until it is bright.
If the front and rear bearings of the rotor are sealed, the outside can be wiped clean. If the seal is broken, it should be replaced in time. Wipe the spiral gear shaft in front of the rotor
Wipe off the oil inside the housing. Wipe the helical gear on the drill chuck rod and the bearings (or bushings) at both ends.
Put the unloaded stuff back, install the rotor first; then install the chuck rod helical gear; install the carbon brush, if the carbon brush is shorter than 7-8 mm, it should be replaced in time. The carbon brush should be installed and flattened, and finally find a little "Mobil" or "Shell" grease added between the gear pair and the bearing (or shaft sleeve). Tighten the screw and turn it by hand to feel that there is no stagnation.
*** It is strictly forbidden to disassemble the electric drill while it is live! Those who do not have basic knowledge of electrical appliances must not do it! *** Electric drill model_Electric drill-Operating regulations
1. Personal protection when using electric drills
1.1 Wear a protective face shield when working face up. Wear protective glasses when drilling holes in cast iron castings to protect your eyes.
1.2 The drill bit holder should be properly installed.
1.3 The drill bit is in a hot state during operation, and you should pay attention to burn your skin.
1.4 When drilling a hand-held electric drill with a diameter of more than 12mm, a pistol drill with a side handle should be used.
1.5 Standing on a ladder or working at a high place should take measures to fall from a high place, and the ladder should be supported by ground personnel.
2. Matters needing attention before operation
2.1 Confirm whether the power supply connected to the site matches the nameplate of the electric drill. Whether there is a leakage protector.
2.2 The drill bit and the gripper should be adapted and properly installed.
2.3 Make sure that the switch on the electric drill is in the locked state, otherwise the electric drill will turn unexpectedly immediately when the plug is inserted into the power socket, which may cause personal injury.
2.4 If the work place is far away from the power source, when the cable needs to be extended, sufficient capacity should be used to install a qualified extension cable. The extension cable should be elevated or pass through measures to prevent the cable from being damaged by rolling.
3. Correct operation method of electric drill
3.1 Drilling holes in metal materials should first be used to punch foreign holes at the drilled position.
3.2 When drilling larger holes, use a small drill to drill through before using a large drill.
3.3 If you need to drill holes in metal for a long time, you can take certain cooling measures to keep the drill bit sharp.
3.4 It is strictly forbidden to directly clean the drill cuttings generated by drilling, and use special tools to clean the cuttings.
4. Maintenance and inspection
4.1 Check the drill
The use of dull or curved drill bits will make the working condition of the motor overload surface abnormal and reduce the operating efficiency. Therefore, if such a situation is found, it should be dealt with and replaced immediately.
4.2 Checking the tightening screws of the electric drill body
Check the tightening of the mounting screws on the body of the electric drill before use. If the screws are loose, they should be retightened immediately. Otherwise, the electric drill may malfunction.
4.3 Check the carbon brush
The carbon brush on the motor is a consumable. Once the wear level exceeds the limit, the motor will malfunction. Therefore, the worn carbon brush should be replaced immediately. In addition, the carbon brush must be kept clean.
4.4 Inspection of protective ground wire
The protective grounding wire is an important measure to protect personal safety, so Class â… appliances (metal enclosures) should be checked frequently.
Electric drills, like other power tools, have also encountered problems in responding to environmental directives. The ROHS Directive issued by the European Union (Directive on Restriction of the Use of Six Hazardous Substances in Electronic and Electrical Products) has been implemented since July 1, 2006. In addition, Germany implemented PAHS (polycyclic aromatic) testing for power tools imported from China in 2005. It is reported that if the shell of the electric drill and drill chuck is made of engineering plastic, it may cause PAHS to exceed the standard.
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