What is counter hole?


Bart Ulyatt   |   Member since 2015  |  10+ Answers Submitted  |  ✔ Verified

A counterbore hole is typically used when a fastener, such as a socket head cap screw, is required to sit flush with or below the level of a workpiece's surface. Whereas a counterbore is a flat-bottomed enlargement of a smaller coaxial hole, a countersink is a conical enlargement of such.

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Judith Vaughn   |   Member since 2005  |  10+ Answers Submitted  |  ✔ Verified

In this way, what is counter sinking and counter boring?

A countersink is a cone-shaped hole that is cut into the PCB to allow the flat head of a socket cap screw to fit flush with the surface of the board. A counterbore is a cylindrical flat-bottomed hole that is designed to house a hex head or socket head cap screw to be used to secure a PCB board.

Likewise, what are the types of holes? Two types of recessed holes are a counterbore, which has a cylindrical recess, and a countersink, which has a cone-shaped recess.


Meredith Whinter   |   Member since 2017  |  10+ Answers Submitted  |  ✔ Verified

Subsequently, one may also ask, what is counter boring operation?

Counter boring : Counter boring is the operation of enlarging one end of an existing hole concentric with the original hole with square bottom. It is done to accommodate the heads of bolts, studs and pins. The cutting edges of the counter - bore (tool used for counter boring ) may have straight or spiral teeth.


Kamila Cox   |   Member since 2020  |  10+ Answers Submitted  |  ✔ Verified

How do you make a countersink hole?

To drill a countersink, place the countersink bit in your drill and push down lightly on the pilot hole. For those who prefer a hands on approach, a hand held countersink tool is also available. Drill down a little at a time until your desired depth.


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Denis Cork   |   Member since 2020  |  ✔ Verified

What is a countersink hole?

Countersunk Holes A countersink is a tapered hole drilled with a wide outer portion. A common usage of the countersunk hole is to allow the head of a flat head bolt or screw, when placed in the hole, to sit flush with or below the surface of the surrounding material.


Kirsten Rossi   |   Member since 2007  |  ✔ Verified

What is tapping operation?

Tapping is the process of cutting a thread inside a hole so that a cap screw or bolt can be threaded into the hole. Also, it is used to make threads on nuts. Tapping is done with a tool called a "Tap". The milling machine provides cutting action with a rotating tool.


Percy Camden   |   Member since 2017  |  ✔ Verified

What is a pilot hole in drilling?

Pilot holes for screws By drilling a small pilot hole into the material, into which a screw is then driven, less wedging takes place, thereby reducing the likelihood of the material being split. A hole drilled for tapping machine screws or bolt threads in metal or plastic may also be referred to as a pilot hole.


Adelaide Dunbar   |   Member since 2018  |  ✔ Verified

How does a reamer work?

A reamer is a type of rotary cutting tool used in metalworking. Precision reamers are designed to enlarge the size of a previously formed hole by a small amount but with a high degree of accuracy to leave smooth sides. The process of enlarging the hole is called reaming.


Bree Plumb   |   Member since 2018  |  ✔ Verified

What is a Spotface hole?

A spotface or spot face is a machined feature in which a certain region of the workpiece (a spot) is faced, providing a smooth, flat, accurately located surface. The cutters most often used to cut spotfaces are counterbore cutters and endmills.


Carrie Stubbs   |   Member since 2014  |  ✔ Verified

What is difference between boring and reaming?

The main difference between drilling, boring and reaming is that drilling is when you make a brand new hole in your work piece. But boring is when you enlarge the hole. The process of drilling uses a drill bit. But the boring process uses a lathe and reaming uses reamers.


Clint Garcia   |   Member since 2013  |  ✔ Verified

What is difference between hole and bore?

As verbs the difference between hole and bore is that hole is to make holes in (an object or surface) while bore is (senseid)to make a hole through something or bore can be (bear).


Jasmine Vass   |   Member since 2020  |  ✔ Verified

Why boring is done?

The goal of boring is to enlarge an existing hole, create a tapered hole from an existing hole, or achieve a desired surface finish inside an existing hole. Boring can be done on lathes, milling machines, or machining centers.


Lily Vince   |   Member since 2007  |  ✔ Verified

What is the difference between a chamfer and a countersink?

The main difference between countersink and chamfer gages is the configuration of the plunger. Chamfer gages have an angled plunger consisting of three fluted sections. Because countersinks are more critical, countersink gages have conical plungers that fit closely against the entire surface of the countersink feature.


Tara Goodman   |   Member since 2018  |  ✔ Verified

What is reaming operation?

Definition of 'reaming' Reaming is a cutting process in which a cutting tool produces a hole of a very accurate size. Reaming is done to a hole which has been already drilled, to produce a truly circular hole of exactly the right diameter. Reaming involves widening the opening of a hole.


Sabrina Clark   |   Member since 2013  |  ✔ Verified

What is a countersunk hole used for?

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-bottomed hole that might be used with a socket-head capscrew).


Belinda Preston   |   Member since 2005  |  ✔ Verified

When should a counterbore be used?

A counterbore is used to enlarge the opening of a hole producing a flat bottom so a socket-head screw will fit flush with the surface of the part. Lock washers may be used to ensure a secure assembly. Typically counterbores are used for a single purpose. Countersinks have a greater range of applications and angles.


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