The impact mechanism of the impact drill has two types: dog-shaped and ball-type. The ball type impact drill consists of a moving plate, a fixed plate, and a steel ball. The moving plate is connected to the main shaft through a thread and has 12 steel balls; the fixed plate is fixed on the casing by pins, and has 4 steel balls. Under the action of the thrust, 12 steel balls roll along 4 steel balls. The carbide drill bit produces a rotary impact motion and can drill holes in brittle materials such as bricks, blocks, and concrete. The overhead nail is removed, so that the fixed disk rotates together with the disk, and no impact is generated, and it can be used for ordinary electric drill.
Impact drills can be used on natural stone or concrete. They are versatile because they can be used in both "single-drill" mode and "impact drill" mode, so it is a basic power tool for professionals and do-it-yourselfers. The electric hammer works by rotating and beating. A single slap force is very high and has a beating frequency of 1,000 to 3,000 per minute, which produces significant force. Compared to impact drills, electric hammers require minimal pressure to drill into hard materials such as stone and concrete; especially relatively hard concrete. The electric drill is only available in a rotating manner and is particularly suitable for drilling holes in materials that require little force, such as cork, metal, brick, tile, etc. Impact drills rely on rotation and shock to work. A single shock is very slight, but a shock frequency of more than 40,000 times per minute produces a continuous force.
How to buy impact drill
(1) The electric drill product is a compulsory certification product stipulated by the National Certification and Accreditation Administration. Therefore, when purchasing, first check whether the tool has the 3C mark. The method of inspection is generally on the outer packaging of the tool or the nameplate of the tool. Whether there is a 3C mark on it, if there is still doubt about this (because the manufacturer of the electric drill has not passed the annual supervision review, the National Certification and Accreditation Administration suspended or revoked its certificate), you can go to the website of the CNCA to check the 3C of the tool. Whether the certificate is currently valid.
(2) When purchasing electric drills in general, you should choose large companies with good reputation and influential, because these large companies have strong technical strength, strict quality control, and relatively regular after-sales service. Users with strong purchasing power can also purchase some tools of international brands.
(3), should be based on the needs of users, first distinguish between home use or professional use, because most of the electric drills are designed for professionals, so before buying, you should distinguish between professional and general household tools. Usually, the difference between professional and general household tools is in power. Professional tools use more power to facilitate the professional to reduce the workload. The general household tools are relatively small in engineering and the workload is relatively small. Power does not need to be very large
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