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In manufacturing, a countersink (symbol: ⌵) is a conical hole cut into a manufactured object, or the cutter used to cut such a hole. A common use is to allow the head of a countersunk bolt , screw or rivet , when placed in the hole, to sit flush with or below the surface of the surrounding material (by comparison, a counterbore makes a flat ...
ISO 3294:2016 Parallel shank countersinks for angles 60, 90 and 120 degrees inclusive ISO 3295:1975 Narrow bandsaw blades for woodworking — Dimensions ISO 3296:1975 Textile machinery and accessories — Tubes for ring-spinning, doubling and twisting spindles, taper 1:64 [Withdrawn: replaced with ISO 368]
Whereas a counterbore is a flat-bottomed enlargement of a smaller coaxial hole, a countersink is a conical enlargement of such. A spotface often takes the form of a very shallow counterbore. As mentioned above, the cutters that produce counterbores are often also called counterbores; sometimes, to avoid ambiguity, the term counterbore cutter is ...
A set of torq-set bits. Torq-set is a cruciform screw drive used in torque-sensitive applications. The Torq-set head is similar in appearance to a Phillips drive in that it has a cross with 4 arms. In Torq-set however, the lines are offset from each other, so they do not align to form intersecting slots across the top of the head.
A countersink is a conical hole cut into a manufactured object; a countersink bit (sometimes called simply countersink) is the cutter used to cut such a hole. A common use is to allow the head of a bolt or screw, with a shape exactly matching the countersunk hole, to sit flush with or below the surface of the surrounding material.
Information processing – Coding on data media – Part 4: Representation of 7-bit coded and 8-bit coded character sets on magnetic tape cassette 3,8: Active: DIN 66004-5: Information processing – Coding on data media – Part 5: Representation of 7-bit coded and 8-bit coded set on media-flexible disk cartridge: Active: DIN 66005
Until then, the only standardization was what little had been done by individual people and companies, with some companies' in-house standards spreading a bit within their industries. Whitworth's new standard specified a 55° thread angle and a thread depth of 0.640327 p and a radius of 0.137329 p , where p is the pitch.
In machining, a tool bit is a non-rotary cutting tool used in metal lathes, shapers, and planers. Such cutters are also often referred to by the set-phrase name of single-point cutting tool , as distinguished from other cutting tools such as a saw or water jet cutter .
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