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Best Jackhammers - July 2023 - BestReviews

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company.

Jackhammer

Published by Houghton Mifflin Harcourt Publishing Company. Yes, and in domestic needs, it can sometimes come in handy (for example, a home master may need to move a doorway in a house, dismantle walls or break a frozen ground).

The first jackhammers (easel) were used in the construction of the tunnel between the cities of Modan (France) and Bardonecchia (Italy) in 1857-71. These machines were designed by engineer Germaine Sommeye.

Later Georg Liner invented the first portable perforator, the design of which was in many respects similar to the design of the modern jackhammer. In the 30s of the 20th century, the first hammers appeared in our country.

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Probably everyone knows about Alexey Stakhanov – the famous miner of the Soviet Union, whose feat was known all over the country (over fulfilment of the coal mining plan – for the change Stakhanov and his assistants extracted 102 tonnes of coal instead of 7). After all, new equipment, namely powerful jackhammers, played a big role in this event.

Stakhanov has posthumously established a monument in the Luhansk region, where the miner is depicted with a jackhammer on his shoulder. A jackhammer is a tool whose main task is to destroy strong materials, such as asphalt, rocks, concrete, brick structures, frozen ground.   Consider the construction of this device using the example of a simple pneumatic hammer.  

This is a piston impact machine that operates under the influence of compressed air.

A special air-distributing mechanism converts the energy of compressed air into a mechanical one, which ensures the activity of the drummer. In general, the structure of the jackhammer is very similar to the structure of the perforator, but there is no mechanism for rotational movements of the bit. The working part is a peak, which can have different shapes (crowbar, scapula, chisel).

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Depending on the type of energy used, the following types of hammers are distinguished: Such models have their advantages and disadvantages. Working from a fuel engine, the devices are very mobile, which is important under certain operating conditions, at the same time they constantly need fuel, are not eco-friendly, produce a lot of noise and vibration. It is determined whether the instrument belongs to a group with such indicators as power, impact force and impact frequency. By weight, all hammers can be divided into light (up to 6 kg), medium (up to 10 kg) and heavy (up to 30 kg).

The first are designed for single-time, periodic work, the second is excellent for horizontal work, the third – for earthwork, requiring special equipment.