How to use hand electric drills and precautions, ask the small electric drill university

Hand drill operating skills, taboos and precautions 1. The main components of a hand drill (1) Single-phase series motor. It is composed of stator, armature, commutator, brush and fan. Through gear reduction, the drill shaft is driven to rotate. (2) Gearbox. Its mechanism is a two-fixed gear reduction transmission. (3) Shell. It is made of aluminum alloy die-casting. The surface is smooth, light weight and durable. (4) Switch. The handle of the electric drill is equipped with a manual quick cut off automatic reset switch, which is convenient and reliable to operate. (5) Drill chuck. Used to clamp drill bits. (6) Power cord. Generally use three-core rubber cord, which is safe and reliable. (7) Plug. The end of the power cord has a single-phase three-post plug. One pole is grounded, and the other two poles are connected to the power supply. 2. Illustration of the types of drill bits commonly used in electric hand drills (1) Features of twist metal drill bits: The head is at a 135-degree angle and the drill is sharp. Scope of application: drilling wood, metal, plastic (2) Ceramic tile drill bit Features: triangle arrow, four-cut corner design on the head. Scope of application: suitable for drilling ordinary ceramic tiles with low hardness. (3) Glass bit features: frosted head and transparent bit body. Scope of application: Water needs to be added during use, suitable for drilling ordinary glass, ceramic tiles, vitrified tiles, stone, etc. (4) The characteristics of the screwdriver head: the head is flat or cross. Scope of application: removal and installation of screws, self-tapping screws, dovetail screws and other fasteners. (5) The characteristics of the grinding head: conical or round or semi-circular grinding tools. Scope of application: grinding of metal parts, molds and jade (6) Sleeve features: external hexagon or internal hexagon. Scope of application: disassembly and installation of hexagonal bolts or nuts. 3. How to replace the drill bit of a hand electric drill (1) Hold the electric switch with your right hand and turn the chuck with your left hand. The drill bit can be inserted into the chuck. (2) Put the drill bit into the chuck with the left hand, and turn the chuck inward with the right hand to make the chuck clamp the drill bit. (3) Hold the machine firmly with the left hand, insert the key into the key hole with the right hand, and turn the key clockwise to make the chuck clamp the drill bit. Fourth, the operation steps and skills of the electric hand drill (1) Choose a hand electric drill with a drill chuck key and suitable power. Get the drill bit ready. (2) Ask an electrician to check whether the electric drill is leaking, and connect it to the power source. (3) Clamp the drill bit with the key and remove the key. (4) Put on rubber insulating gloves and turn on the electric drill switch to check whether the electric drill is operating normally. (5) Use the drill bit against the workpiece to drill the punch hole, align the vertical position of the drill bit and the workpiece processing surface, maintain the correct drilling posture, hold the electric drill firmly with both hands, turn on the switch, and try to drill a shallow hole. (6) Check whether the hole position is correct. If there is a deviation, adjust the angle of the drill bit to correct the center of the hole. If there is no deviation, apply the force evenly and feed the hole into the hole. (7) When drilling holes, do not shake the hand drill, and always retract the tool to remove chips. When the through hole is drilled to the end, it is necessary to advance slowly. (8) After drilling, remove the drill bit, remove the power cord or unplug the power switch in time, and arrange the power cord. (9) Clean up the work site. 5. Taboos and precautions for the use of electric hand drills (1) When the electric hand drill is working, the power cord should be placed in a place that is not easy to be stirred or stepped on. (2) Before use, it must be turned on and idling for 1 minute to check whether the transmission components are normal. If there is any abnormality, it should be used after troubleshooting. (3) When drilling holes, be sure to hold the electric drill with both hands, otherwise personal accidents are likely to occur. (4) When using a hand electric drill, handle it with care to avoid breaking the shell. (5) The electric drill should be checked regularly, the problems found in each component should be dealt with in time, and attention should be paid to maintenance. Previous post: The operation method of hand tapping thread, tapping is very easy after learning