What is counter bored?

What is counter bored?

to enlarge the upper part of (a hole) in timber, metal, etc, so that the head of a bolt or screw can be sunk below the surface. 2. to drive (a screw) or sink (a bolt) into such an enlarged hole.

Why counter boring is done?

Explanation: Counter boring is the operation of enlarging the end of a hole using a tool called counterbore. Counter boring is done for accommodating socket head screws.

What is the benefit of countersinking holes?

Countersinking is done to insure that flat head screws sit flush to the work piece. A countersink produces a conical hole matching the angle of the screw so that when the screw is fully engaged the head will sit flush or slightly below the surface.

Is countersinking necessary?

For soft woods, like pine, a countersink may not be needed, as you can usually just drill a wee bit longer to get the head flush. But for hardwoods, countersinks are a must if you want the screw head flush, or to hide it completely below the surface by placing wood filler or a plug above it.

When should you not use countersunk screws?

When building furniture, manufacturers often use countersunk screws so that the heads don’t protrude. If the head protrudes out of a piece of furniture, such as a recliner, it will likely be uncomfortable to consumers to use. Therefore, wooden furniture is typically manufactured using countersunk screws.

What is the difference between Counterboring and spotface?

Spotface vs counterbore A spotface is functionally no different than a counterbore. A counterbore usually references a feature that is deeper than a spotface. While a spotface creates a flat mounting surface, a counterbore acts to recess the fastener.

What is the main purpose of a counterbore?

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.

Can you countersink with a regular drill bit?

Another improvised way to countersink a screw is to drill your pilot hole with your regular drill bit and then use a Phillips head bit to hollow out a countersink divot to a depth where the screw head can lie flat. This method furnished a surprisingly clean-looking hole.

What is the purpose of a spotface?

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.

What is spotface counterbore?

A spotface provides an accurate bearing surface for the underside of a bolt head. Counterbore. Symbol. Countersink Callouts. Countersink – To recess a hole with a conically (cone) shaped tool to provide a seat for flat head screws.

What would be the advantage of a counterbore over a drilled hole?

A counterbore is used to enlarge the opening of a hole so a screw can fit flush with the part. Lock washers can be used to make sure an assembly is secure.