Five pits: it means that the number of grooves at the drill handle of electric hammer is five pits, which are divided into three keyways and two steel ball grooves. It is suitable for five pits electric hammer. This kind of drill is generally used on heavy electric hammers.
Wukeng is a patent of Bosch. You have to buy a Bosch patent to produce this kind of electric hammer. Four pits are everywhere, and every family can produce.
Electric hammer is a widely used electric tool. On the basis of electric drill, electric hammer adds a piston with crankshaft connecting rod driven by motor to compress the air in the cylinder to and fro, so that the air pressure in the cylinder changes periodically. The changed air pressure drives the hammer in the cylinder to hit the top of the drill bit to and fro, which is opposite to hitting the drill bit with a hammer. Hence the name electric hammer [1].
Electric hammer is a kind of electric drill, which is mainly used to drill holes in concrete, floor, brick wall and stone. Specially drilling holes in walls, concrete and stones, there is also a multifunctional electric hammer, which can be used instead of ordinary electric drills and picks by adjusting it to a suitable position and matching it with a suitable drill.
Because the drill bit of the electric hammer rotates, it also produces rapid reciprocating motion (frequent impact) along the direction of the electric drill rod, so it can quickly drill holes in brittle materials such as cement concrete and stone. High-grade electric hammers can use the changeover switch to make the drill bit of the electric hammer in different working states, that is, only rotating without impact, only impacting without rotating, both impacting and rotating.
1, good damping system: it can make the operator hold it comfortably and relieve fatigue.
Implementation mode: through the "vibration control system"; Increase the grip comfort through the soft rubber handle;
2. Accurate speed control switch: the touch switch has a low speed, which can help the machine to trip out smoothly (for example, tripping out on smooth surfaces such as ceramic tiles, which can not only prevent the bit from slipping, but also prevent the hole from breaking. High speed can be used during normal operation to ensure work efficiency.
3. Stable and reliable safety clutch: Also known as torque limiting clutch, it is a kind of safety protection for users to avoid the transmission of large torque reaction force caused by the bit sticking to the user during use. This feature can also prevent the gear device and the motor from stopping rotating.
4. Comprehensive motor protection device: In use, it is inevitable that granular hard objects will enter the interior of the machine (especially when the machine operates upward, such as drilling on the top of the wall). If the motor is not protected to a certain extent, it will be easily broken or scratched by hard objects during high-speed rotation, which will eventually lead to motor failure.
5. Positive and negative rotation function: it can make the application of electric hammer more extensive, and its realization form is mainly realized by switching or adjusting the position of carbon brush. Usually, big-name tools will adjust the position of carbon brush (rotating brush handle), which is convenient to operate, effectively restrain sparks and protect commutator, and prolong the service life of motor.
6, hammer drill dual function