Angle grinder: Difference between revisions
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[[Image:AngleGrinder.jpg|thumb|Angle grinder]] |
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{{Refimprove|date=June 2009}} |
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An '''angle grinder''', also known as a '''side grinder''' or '''disc grinder''', is a handheld [[power tool]] used for cutting, [[grinder (milling)|grinding]] and [[polishing]].<ref>[http://www.katools.com/faq.html KA Tools FAQ]</ref> |
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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]] [[grinding wheel|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 [[sander]]s, 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. |
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[[File:Flex.ogv|thumb|Angle grinder]] |
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==Uses== |
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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 [[bearing (mechanical)|bearing]]s to counter side forces generated during cutting, unlike a [[drill|power drill]], where the force is axial. |
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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 ([[pneumatics|pneumatic]] or electric), [[Revolutions per minute|rpm]], and [[Mandrel|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 [[Accuracy and precision|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. |
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==Safety== |
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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 [[A-weighting|dBA]].<ref name="multiples">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</ref>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. |
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== References == |
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{{Commons category|Angle grinders}} |
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{{reflist}} |
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{{Metalworking navbox|machopen}} |
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{{Stonemasonry}} |
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{{Types of tools}} |
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{{DEFAULTSORT:Angle Grinder}} |
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[[Category:Grinders]] |
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[[Category:Hand-held power tools]] |
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[[af:Hoekslyper]] |
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[[ar:جلاخة زاوية]] |
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[[bg:Ъглошлайф]] |
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[[ca:Esmoladora angular]] |
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[[cs:Úhlová bruska]] |
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[[da:Vinkelsliber]] |
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[[de:Winkelschleifer]] |
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[[es:Esmeril angular]] |
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[[eo:Angulŝlifa maŝino]] |
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[[fr:Disqueuse]] |
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[[it:Smerigliatrice#Smerigliatrice_angolare]] |
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[[he:דיסק חיתוך]] |
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[[nl:Haakse slijper]] |
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[[nds-nl:Stroaljager (gerei)]] |
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[[no:Vinkelsliper]] |
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[[pl:Szlifierka kątowa]] |
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[[pt:Rebarbadora]] |
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[[ru:Угловая шлифовальная машина]] |
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[[szl:Fleksa]] |
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[[fi:Kulmahiomakone]] |
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[[sv:Vinkelslip]] |
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[[uk:Кутова шліфувальна машина]] |
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