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Square keys are used for smaller shafts and rectangular faced keys are used for shaft diameters over 6.5 in (170 mm) or when the wall thickness of the mating hub is an issue. Set screws often accompany parallel keys to lock the mating parts into place. [3] The keyway is a longitudinal slot in both the shaft and mating part.
Hex keys of various sizes with ball ends. Tamper-resistant hex screws have a protruding pin in the center of the hex recess that prevents insertion of standard hex keys; as such, they can only be fastened and removed with a special key that has a recess for the pin. A similar "center pin reject" security feature is also used on torx screws.
Also, there are limits on the size of internal cuts. Common internal holes can range from 0.125 to 6 in (3.2 to 152.4 mm) in diameter but it is possible to achieve a range of 0.05 to 13 in (1.3 to 330.2 mm). Surface broaches' range is usually 0.075 to 10 in (1.9 to 254.0 mm), although the feasible range is 0.02 to 20 in (0.51 to 508.00 mm).
Keyway may refer to: A part of a keyed joint used to connect a rotating machine element to a shaft; see key (engineering) A keyhole , a hole or aperture (as in a door or lock) for receiving a key; see lock and key
25 mm to 60 mm with 5 mm steps; 60 mm to 110 mm with 10 mm steps; 110 mm to 140 mm with 15 mm steps; 140 mm to 500 mm with 20 mm steps; The standard lengths of the shafts are 5 m, 6 m and 7 m. Usually 1m to 5m is used.
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A standard metric (concrete) block is 190 mm wide, 390 mm long, and 190 mm high, which allows for 10 mm mortar joints in between bricks, giving a standard unit size of 200 mm square by 400 mm long. [3] A standard metric brick is 90 by 57 by 190 mm; with 10 mm of mortar, that produces a standard unit of 100 mm x 200 mm. [3]
A six-pin interchangeable core with an 'A' keyway and individual chamber capping in an ANSI/BHMA 626 satin chrome finish. An interchangeable core or IC is an adaptable locking key cylinder, which can be rapidly exchanged in the field via the use of specialized "control keys".