In machining, a counterbore (symbol: ⌴) is a cylindrical flat-bottomed hole that enlarges another coaxial hole, or the tool used to create that feature...

with or below the surface of the surrounding material (by comparison, a counterbore makes a flat-bottomed hole that might be used with a socket-head capscrew)...

where the bolt's head will sit, which is often done by cutting a shallow counterbore, just deep enough "to clean up"—that is, only enough material is removed...

plastic that, on the crankarm, is snapped or screwed into the threaded counterbore, which houses the bolt that holds the crankarm to its axle, the bottom...

glued although it is not necessary. In solid timber work it is common to counterbore a hole in the frame or carcase member to conceal the head of the screw...

following commission, including excessively high noise levels and cylinder counterbore cracking in the high-speed engines. On April 15, 2002 Skeena Queen was...

Soviet Union, but also its various satellite nations. Many of these were counterbored post-war. Model 1891/59 Carbine: Commonly called "91/59s," the M1891/59s...

grip 28-2 1969 Change to N serial number 28-2 1982 Eliminate cylinder counterbore and pinned barrel, change to cylinder length to 1.57" 28-3 1986 Model...

typically flanged, and may fit into standard Allen hex socket cap screw counterbores molded or machined into parts to be fastened. Compared to Allen hex sockets...

the bolt or the nut sits inside a counterbore that is also threaded to accept a crank puller tool. The counterbore is often covered with a dust cover...

operations, like truing, making fillets, chamfers, countersinking, counterboring, etc. It may also receive various surface treatments and finishes. The...

thickness of its walls in the exit region. It was found that inserting a counterbore here reduced wetting. Today, the nozzles are designed to have a minimum...

suitable for quick and easy drilling of straight holes, countersinking or counterboring that are perpendicular to both directions of a table surface. In comparison...

features, such as two holes. C/T Correlation / Tracking C'BORE or CBORE or counterbore CSK or CSINK or countersink CTN, ctn carton depth, deep, down Defines...

a blind rivet nut, or rivnut, is a one-piece internally threaded and counterbored tubular rivet that can be anchored entirely from one side. It is a kind...

main and connecting rod bearings and different connecting rods. The counterbore in the rear flange of the crankshaft was 1+1⁄4 inches (32 mm) diameter...

following are some related processes that often accompany drilling: Counterboring This process creates a stepped hole in which a larger diameter follows...

bits. Other tools that are commonly used in a drill bushing include counterbores, countersinks, and reamers. They are designed to guide, position, and...

the bolted joint firmly together. The lock ring, once assembled into a counterbore in the nut body, provides clamping force on the bolt while the nut body...

cracking. To relieve stress in the barrel, new production M2A1 tubes were counterbored two inches from the muzzle starting in the late 1940s. By the end of...

drill bit for making holes in wood, plastic, metals, concrete and more Counterbore Drill Bits – a drill bit used to enlarge existing holes Countersink Drill...

endmills, and form cutters; various drills, reamers, taps, countersinks, counterbores, and core drills; various turning tools, form tools, and threading tools;...

sight 27-2 1980 Target stocks standard 27-3 1982 Eliminate cylinder counterbore and pinned barrel, change in cylinder length to 1.57" 27-3 1986 Discontinue...

broaches. Rotary cutting tools include drill bits, countersinks and counterbores, taps and dies, reamers, and cold saw blades. Other cutting tools, such...

Changed from gas ring on yoke to cylinder 13-3 1982 Eliminated cylinder counterbore and pinned barrel/small change in cylinder length to 1.62" 13-4 1988...

ground diameter and the original diameter is either straight, to form a counterbore, or angled, to form a countersink. The advantage to this style is that...

Non-edged, Non-powered 5130: Hand Tools, Power Driven 5133: Drill Bits, Counterbores, and Countersinks: Hand and Machine 5136: Taps, Dies, and Collets; Hand...

outer diameter to very close limits, which can involve one or more counterboring operations, several facing operations, and drilling, tapping, and threading...

57 1969 Change to N serial number prefix 57-1 1982 Eliminate cylinder counterbore and pinned barrel, change in cylinder length to 1.67″ 57-1 1986 Nickel...

shanks and solid pilots ISO 4206:2016 Counterbores with parallel shanks and solid pilots ISO 4207:2016 Counterbores with Morse taper shanks and detachable...