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Side and end view of a 4-fluted countersink. The fluted countersink cutter is used to provide a heavy chamfer in the entrance to a drilled hole. This may be required to allow the correct seating for a countersunk-head screw or to provide the lead in for a second machining operation such as tapping.
A counterbore in a metal plate. In machining, a counterbore (symbol: ⌴) is a cylindrical flat-bottomed hole that enlarges another coaxial hole, or the tool used to create that feature. A counterbore hole is typically used when a fastener, such as a socket head cap screw or fillister head screw, is required to sit flush with or below the level ...
2. (n.) Any tool used for drilling holes, such as a chisel used in combination with a mallet. Decay in timber caused by fungal growth, usually in a moist, stagnant, poorly ventilated atmosphere. A system used to capture wood dust from woodworking machines such as a table saw, miter saw, router, planer, or jointer.
I routinely use them for creating countersinks in aluminum and mild steel. They have much less chatter than the multi-flute ones. -- Pstemari ( talk ) 00:11, 12 November 2016 (UTC) [ reply ]
A chamfer (/ ˈʃæm.fər / or / ˈtʃæm.fər /) is a transitional edge between two faces of an object. Sometimes defined as a form of bevel, it is often created at a 45° angle between two adjoining right-angled faces. Chamfers are frequently used in machining, carpentry, furniture, concrete formwork, mirrors, and to facilitate assembly of ...
Most workbenches are made from solid wood; the most expensive and desirable are made of solid hardwood, with tops laminated lengthwise in edge-grain butcher block fashion. Benches may also be made from plywood and Masonite or hardboard, and bases of treated pine and even steel. There are trade offs with the choice of construction material.
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