A portable jackhammer being used to break up roadworks. Pneumatic hose can be seen leading to the compressor on the back of the truck. The operator is using his body weight to increase the effectiveness of the device.

A pneumatic drill or jackhammer is a portable percussive drill powered by compressed air. It is used to drill rock, break up pavement, among other applications. It works similar to a hammer and chisel, by jabbing with its bit, not rotating it. (A drill driven by compressed air, which rotates its cutting bit is called an air-drill or familiarly, a windy-drill or rotary hammer.) The word jackhammer is used in North American English and in Australia, and pneumatic drill is used colloquially elsewhere in the English speaking world, although (road) breaker is used in the trade. Jackhammer may mean: Jackhammer, a portable percussive-drill Jackhammer (cocktail), a cocktail commonly made from vodka and pineapple juice, similar to a screwdriver Pancor Jackhammer, an assault shotgun MTX Audio JackHammer, a 22 inch Subwoofer Jackhammer (Wrestling) A sexual position with the woman on top Penis (slang) In music video... ImageMetadata File history File links Download high resolution version (3072x2048, 3111 KB) A jackhammer being used to remove a roadsurface in roadworks. ... ImageMetadata File history File links Download high resolution version (3072x2048, 3111 KB) A jackhammer being used to remove a roadsurface in roadworks. ... Roadworks on the A9 Autobahn in Germany. ... Pneumatics, from the Greek πνευματικός (pneumatikos, coming from the wind) is the use of pressurized air in science and technology. ... A gas compressor is a mechanical device that increases the pressure of a gas by reducing its volume. ... Portable communications devices refer to hand-held or wearable devices. ... For other uses, see Drill (disambiguation). ... Compressed air is used to refer to: Pneumatics, the use of pressurized gases to do work, as used in the Air car Breathing gas, often used in scuba diving, also to inflate buoyancy devices Compressed air can also be used for cooling using a vortex tube. ... Rock redirects here. ... For a pedestrian path situated alongside a road, see sidewalk. ... A claw hammer For other uses, see Hammer (disambiguation). ... Steel woodworking chisel. ... North American English is a collective term used for the varieties of the English language that are spoken in the United States and Canada. ... The term Anglosphere describes a certain group of English-speaking countries. ...

The portable pneumatic jackhammer is impractical for use on walls and steep slopes, as it relies on the inertia of the mass of its body to drive the bit into the work, and manipulating that mass when not supported by the work is difficult. Also, gravity is required to bring the mass back into contact with the work after each blow. Though it is unhealthy practice, the operator may lean on the tool to assist but is not really capable of overcoming the forces involved when not assisted by gravity. A technique developed by experienced laborers is the use of two man teams to overcome this obstacle of gravity. One laborer operates the hammer and the second assists by holding the hammer either on his shoulders or cradled in his arms. Both use their combined weight to push the bit into the workface. This method is commonly referred to as horizontal jackhammering. Another method is overhead jackhammering, requiring strength conditioning and endurance to hold a smaller jackhammer, called a rivet buster, over ones head. Pneumatics, from the Greek πνευματικός (pneumatikos, coming from the wind) is the use of pressurized air in science and technology. ... This article is about inertia as it applies to local motion. ... For other uses, see Mass (disambiguation). ... Gravity is a force of attraction that acts between bodies that have mass. ...

Its pneumatic hose connections are designed so that any hose will connect with other any hose without attention to male and female hose-ends. see Gender of connectors and fasteners. This article is about the Male sex. ... For other uses, see Female (disambiguation). ... In electrical and mechanical trades and manufacturing, each of a pair of mating connectors or fasteners is conventionally assigned the designation male or female. ...

Hydraulic operation

A hydraulic jackhammer, much larger than portable ones, may be fitted to mechanical excavators or backhoes and is widely used for roadwork, quarrying and general demolition or construction groundwork. In mining, it is possible to use this against a vertical wall as the machine can be braced against the opposite wall of the gallery or some comparable device. Pneumatic tools are likely to be used in underground coal mines due to safety concerns. Hydraulics is a branch of science and engineering concerned with the use of liquids to perform mechanical tasks. ... A tracked excavator by Daewoo. ... It has been suggested that Backhoe fade be merged into this article or section. ... This article is about mineral extractions. ... This article is about mineral extractions. ... Coal Example chemical structure of coal Coal (pronounced ) is a fossil fuel formed in swamp ecosystems where plant remains were saved by water and mud from oxidization and biodegradation. ...

Hydraulic breakers usually use a hydraulic motor driving a sealed pneumatic hammer system, as a hydraulic hammer would develop a low strike speed and transfer unacceptable shock loads to the pump system.

Electro-mechanical operation

Makita single phase demolition breaker.

While the term "jackhammer" is occasionally used to mean "pneumatic drill", the electromechanical tool that performs the same function is normally the one called a "jackhammer" in Britain. This tool is useful where the work is light and inaccessible to compressor. Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... In engineering, electromechanics combines electromagnetism and mechanics. ... A gas compressor is a mechanical device that increases the pressure of a gas by reducing its volume. ...

The Makita breaker pictured uses standard 25mm (1") points and chisels identical to the ones used in medium sized pneumatic tools. It uses 1300W of power and weighs about 19 kg (about 42 pounds) with a point installed. Pneumatics, from the Greek πνευματικός (pneumatikos, coming from the wind) is the use of pressurized air in science and technology. ...

This type and size of machine is commonly rented by amateurs for renovation jobs.thoma

Health

The sound of the hammer blows, combined with the explosive air exhaust, makes pneumatic jackhammers dangerously loud, emitting 100 decibels at two meters. Sound-blocking earmuffs must be worn by the operator to prevent a form of hearing damage of which tinnitus is the main symptom. Most pneumatic jackhammers now have a silencer around the barrel of the tool, which is the black item in the image below. For other uses, see Decibel (disambiguation). ... A pair of Husqvarna earmuffs ear defenders and visor on a safety helmet Earmuffs are objects designed to cover a persons ears for protection. ... Hearing (or audition) is one of the traditional five senses, and refers to the ability to detect sound. ... Tinnitus (pronounced or ,[1] from the Latin word for ringing[2]) is the perception of sound in the human ear in the absence of corresponding external sound(s). ... The term symptom (from the Greek meaning chance, mishap or casualty, itself derived from συμπιπτω meaning to fall upon or to happen to) has two similar meanings in the context of physical and mental health: Strictly, a symptom is a sensation or change in health function experienced by a patient. ... The word silencer can mean: The noise suppressor that goes on the end of a gun barrel Silencer on an internal combustion engines exhaust pipe A sound-reducing device located in a large chimney Silencer (DNA) is a type of regulating DNA sequence Silencer (game) is a game by...

Prolonged exposure to the pronounced vibration set up by the tool can lead to blood-circulation failures in the fingers, a condition known as white finger. Using atheltic-tape on the fingers is not effective, but seems to help. Pneumatic drill usage can also lead to a predisposition for development of carpal tunnel syndrome. Oscillation is the variation, typically in time, of some measure about a central value (often a point of equilibrium) or between two or more different states. ... Human blood smear: a - erythrocytes; b - neutrophil; c - eosinophil; d - lymphocyte. ... This article does not cite any references or sources. ... Vibration white finger is a secondary form of Raynauds Disease, an industrial injury triggered by continuous use of vibrating hand-held machinery. ... This article is about the medical condition. ...

Types of Jackhammers

90 lb

60 lb (most common)

Rivet Buster (moniker from when rivets were used)

35 lb

22 lb Chipping gun (small jackhammer with variable speed trigger)

Small chipping gun

Bits

Spade - provides flat finish for concrete or edging in asphalt or dirt

Flat tip - allows direction control or finer edge finish

Point - general breaking

Stake driver - drives concrete form stakes

Scrabbler - finishes surface smooth or for cleaning prior to bonding

Images

External links

Wikimedia Commons has media related to:

Jackhammer

• Using a jack hammer non commercial help site.