Working principle of electric hammer and precautions for use

Working principle of electric hammer

Electric hammer is a type of electric drill, mainly used for drilling holes in concrete, floor, brick wall and stone. Multi-function electric hammer can be equipped with appropriate drill bits for multi-purpose purposes such as drill, hammer, hammer drill and shovel.

The electric hammer drives the piston to reciprocate compressed air in a cylinder by the transmission mechanism. The periodic change of air pressure in the cylinder drives the hammer in the cylinder to reciprocate against the top of the brick, as if we hit the brick with a hammer.

In addition to rotating like an electric drill, the electric hammer also has the function of moving back and forth. Generally, the electric hammer includes the electric drill function, and some electric hammers are also called impact electric drills. The electric hammer is suitable for large calibers such as above 30MM.

Working principle: The principle of the electric hammer is that the transmission mechanism drives the drill bit to make a rotary motion, and there is also a reciprocating hammering motion in a direction perpendicular to the rotary head. The electric hammer drives the piston to reciprocate compressed air in a cylinder by the transmission mechanism. The periodic change of air pressure in the cylinder drives the hammer in the cylinder to reciprocate against the top of the brick. It seems that we hit the brick with a hammer, so it is called an electric hammer!


Personal protection when using an electric hammer

1. The operator should wear protective glasses to protect his eyes, and wear a protective mask when working with the face up.

2. Keep earplugs in place for long-term operations to mitigate the effects of noise.

3. The drill bit is in a hot state after long-term operation, and you should pay attention to burn your skin when replacing it.

4. The side handle should be used during operation, and it should be operated with both hands, so that the arm will be sprained by the reaction force when the rotation is blocked.

5. When working on a ladder or working at a high place, measures for falling from a high place should be taken, and the ladder should be supported by ground personnel.



Matters needing attention in electric hammer operation

1. Confirm whether the power supply connected to the site matches the nameplate of the electric hammer. Whether there is a leakage protector.

2. The drill bit and the gripper should be adapted and properly installed.

3. When drilling walls, ceilings, and floors, you should first confirm whether there are buried cables or pipes.

4. When working in high places, pay full attention to the safety of the objects and pedestrians below, and set warning signs if necessary.

5. Confirm whether the switch on the hammer is cut off. If the power switch is turned on, the power tool will turn unexpectedly immediately when the plug is inserted into the power socket, which may cause personal injury.

6. If the working 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.



Correct operation method of electric hammer

1. "Drilling with impact" operation

(1) Pull the working mode knob to the impact rotary hole position.

(2) Put the drill bit at the position where the hole needs to be drilled, and then pull out the east switch trigger. The hammer drill only needs to be pushed slightly to allow the chips to be discharged freely without pushing hard.


2. "Chiseling and crushing" operation

(1) Pull the working mode knob to the "single tap" position.

(2) Use the weight of the drilling rig to carry out the operation without pushing hard.


3. "Drilling" operations

(1) Pull the working mode knob to the "drilled hole" (without hammering) position.

(2) Put the drill bit at the position where the hole needs to be drilled, and then pull the switch trigger. Just push it.


Check the drill

The use of a dull or curved drill bit 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.



Check the tightening screws of the hammer body

Due to the impact of the electric hammer operation, the mounting screws of the electric hammer body are easy to loosen, and the tightening situation should be checked frequently. If the screws are found to be loose, they should be re-tightened immediately, otherwise the electric hammer will fail.



Check 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.

Protective ground wire inspection

The protective ground wire is an important measure to protect personal safety, so Class Ⅰ appliances (metal enclosures) should be checked frequently and their enclosures should be well grounded.



Check the dust cover

The dust cover is designed to prevent dust from entering the internal mechanism. If the inside of the dust cover is worn out, it should be replaced immediately.