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An angle grinder, also known as a side grinder or disc grinder, is a handheld power tool used for cutting, grinding and polishing.
Angle grinders can be powered by an electric motor, petrol engine or compressed air. The motor drives a geared head at a right-angle on which is mounted an abrasive disc or a thinner cut-off disc, either of which can be replaced when worn. Angle grinders typically have an adjustable guard and a side-handle for two-handed operation. Certain angle grinders, depending on their speed range, can be used as sanders, employing a sanding disc with a backing pad or disc. The backing system is typically made of hard plastic, phenolic resin, or medium-hard rubber depending on the amount of flexibility desired.
Angle grinders may be used both for removing excess material from a piece or simply cutting into a piece. There are many different kinds of discs that are used for various materials and tasks, such as cut-off discs (diamond blade), abrasive grinding discs, grinding stones, sanding discs, wire brush wheels and polishing pads. The angle grinder has large bearings to counter side forces generated during cutting, unlike a power drill, where the force is axial.
Angle grinders are widely used in metalworking and construction, as well as in emergency rescues. They are commonly found in workshops, service garages and auto body repair shops. There is a large variety of angle grinders to choose from when trying to find the right one for the job. The most important factors in choosing the right grinder are the disc size and how powerful the motor is. Other factors include power source (pneumatic or electric), rpm, and arbor size. Generally disc size and power increase together. Disc size is usually measured in inches or millimetres. Common disc sizes for angle grinders in the U.S.A. include 4, 4.5, 5, 6, 7, 9 and 12 inches. Discs for pneumatic grinders also come much smaller. Pneumatic grinders are generally used for lighter duty jobs where more precision is required. This is likely because pneumatic grinders can be small and light yet remain powerful, because they do not contain heavy copper motor windings, while it is harder for an electric grinder to maintain adequate power with smaller size. Electric grinders are more commonly used for larger, heavy duty jobs. However, there are also small electric grinders and large pneumatic grinders.
Through a sound power level and vibrations study conducted by the National Institute for Occupational Safety and Health, grinders under an unloaded condition ranged from 91 to 103 dBA.In addition, Angle Grinders produce many sparks. This is a great hazard to the eyes, and as such, safety goggles must be worn. Angle Grinders should never be used without their guard or handle attached, they are there as a necessary precaution for safety. All work should be securely clamped or held firmly in a vice, unlike the job being done in the video above.
- ^ KA Tools FAQ
- ^ National Institute for Occupational Safety and Health (NIOSH) Division of Applied Research and Technology (DART), Hand-held Power Tools Sound Pressure and Vibrations Database, 2009
Sun, 19 May 2013 02:58:15 -0700
A RACQ CareFlight doctor prepares to airlift a Wandoan man in his 30s after he was seriously wounded by an angle grinder. UPDATE: The Wandoan man whose neck was sliced when the disc of an angle grinder exploded has been released from ...
Wed, 24 Apr 2013 07:37:45 -0700
Broken mirrors, punches, guns, bats and axes, we though we've seen them all when it comes to road rage incidents. But it looks like Russia (or former URSS space, for what's worth) is still full of surprises, and one of them is seeing a bikes using a ...
Tue, 07 May 2013 19:04:25 -0700
Thankfully James and his team had a handy solution for that - an angle grinder and belt sander. "It's not unusual to have to shear the heads off bolts during this process," he explained. Project Peugeot: Get the angle grinder out James Baggott "gets ...
Tue, 23 Apr 2013 17:00:40 -0700
Keep watching – the altercation concludes with an angle grinder, a frightened Juke driver and the loss of one minor appendage that once belonged to said Juke. Finally, a sticker that says 'NTV' is placed on the car's window, a fellow motorist appears ...
Fri, 10 May 2013 09:24:46 -0700
Robbers armed with an angle grinder, an axe and a crowbar cut their way into a Chorlton Tesco cash machine after forcing terrified staff to open a secure office. Three masked men burst into the office which allowed them to get to the back of the cash ...
Thu, 23 May 2013 11:43:23 -0700
Someone broke into a Dodge 2500 in the 300 block of South Elmwood Avenue between 5:30 p.m. May 13 and noon May 14 and stole a GPS unit, an iTouch, a power Milwaukee angle grinder, drill, impact driver and a charger. The estimated loss is $1,140, ...
Thu, 25 Apr 2013 05:54:06 -0700
People who prefer two wheels instead of four for getting around always swear by their motorcycles and some really seem to not like drivers very much, for no apparent reason. This is clearly evidence of bottled up hatred, as this particular scooter ...
Airdrie and Coatbridge Advertiser
Wed, 22 May 2013 18:00:21 -0700
Police are seeking information after tools were stolen from a garden shed in Airdrie at the weekend. The theft occurred at some point overnight between 11pm on Friday and 7am on Saturday. An angle grinder, an electric table saw, a drill, a hand saw and ...
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