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difference between a hammer drill and impact drill

  difference between a hammer drill and impact drill

Although Hammer Drill and Impact Drill are both electric drilling tools, there are some obvious differences between them:

working principle:

Hammer drill: has a hammer tube rotatably supported in the housing. The hammer tube can be rotationally driven through a transmission gear of a transmission device placed on the hammer tube. There is also an impact mechanism inside the hammer drill, which has a piston that can be driven into a reciprocating stroke. The hammer drill can be used in both “single drill” mode and “impact drill” mode, so it is universal.

Impact drill (Impact Drill): It mainly uses rotary cutting, and also has an impact mechanism that relies on the operator’s thrust to produce impact force. It is used to drill holes in materials such as bricks, blocks, and lightweight walls. There are two types of impact mechanisms of impact drills: dog tooth type and ball type. Although the impact force generated is single and slight, high-frequency impacts (up to more than 40,000 times per minute) can produce continuous force.


Hammer drill: Because of its hammering function, the single hammering force is very high, and it has a hammering frequency of 1000 to 3000 per minute, so it can generate significant force. It is particularly suitable for drilling in materials that require greater force, such as stone and concrete.

Impact drill: Although it also produces impact, it is primarily used for drilling holes in brittle materials such as bricks, blockwork, and concrete.

Structural features:

Hammer drill: usually has a work type switch for the work type “impact drilling” and “chisel drilling”, and the use mode can be selected according to needs.

Impact drill: Its impact mechanism (such as ball type) is composed of a moving plate, a fixed plate, a steel ball, etc. The moving plate is connected to the main shaft through threads, and causes the carbide drill bit to produce rotational impact motion under the action of thrust.

In general, hammer drills and impact drills are both electric drilling tools, but hammer drills are more suitable for drilling in hard materials that require greater force, while impact drills are mainly used for drilling in brittle materials. When choosing to use it, it needs to be determined based on specific job requirements.

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