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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 ...
Drill bit shank. The shank is the end of a drill bit grasped by the chuck of a drill. The cutting edges of the drill bit contact the workpiece, and are connected via the shaft with the shank, which fits into the chuck. In many cases a general-purpose arrangement is used, such as a bit with cylindrical shaft and shank in a three-jaw chuck which ...
In 1913, Woolley and Meredith defined them like Anthony, but gave the following dimensions: hex head cap screws up to and including 7 ⁄ 16 inch (11.1125 mm) have a head that is 3 ⁄ 16 inch (4.7625 mm) larger than the shank diameter; screws greater than 1 ⁄ 2 inch (12.7 mm) in diameter have a head that is 1 ⁄ 4 inch (6.35 mm) larger than ...
The results of a new large-scale study published in The BMJ suggest that a relatively new diabetes drug might reduce the risk of developing dementia in people with type 2 diabetes. Taking SGLT-2 ...
The planned difference between the drill diameter and the reamer diameter is called an allowance. (It allows for the removal of a certain small amount of material.) The allowance should be < 0.2 mm (.008 in) for soft materials and < 0.13 mm (.005 in) for hard materials. Larger allowances can damage the reamer.
Photos and videos captured the "biblical devastation" in Asheville, North Carolina as residents scramble to find resources after flooding and power outages caused gas and water shortages.. Roads ...
A rise in rates of sudden unexpected infant deaths may have been linked to an off-season surge of respiratory syncytial virus (RSV) in 2021, according to a new study published Thursday in the ...
Instead of covering up the screw head that it serves as an aesthetic part of the design. Ten different recess sizes are available for the Mortorq. The smallest of these, the PMT-000 can be used with screws that have a head diameter as small as 2.5 mm. While the largest called PMT-7 can be used on screws with a head diameter of 35 mm. [38]
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