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Countersink & Counterbore ?

A countersink is a cone shaped hole cut into the laminate. It is typically used to allow the tapered head of a screw to sit flush with the top of the laminate. By comparison, a counterbore makes a flat-bottomed hole and its sides are drilled straight down. This is usually used to fit a hex-headed cap or screw

Countersink

A countersink is a cone shaped hole cut into the laminate.  It is typically used to allow the tapered head of a screw to sit flush with the top of the laminate.  By comparison,

To accurately drill your countersunk holes, we will need below info :

1. Angle of the drill
2. Major Diameter (finished Dim.)
3. Depth the countersink
4. Which side of the board is the sink on (Top or Bottom)?
5. The finished diameter of the shaft of the hole
6. Plated or non-plated (Sink / shaft ) ?

Counterbore

a counterbore makes a flat-bottomed hole and its sides are drilled straight down.  This is usually used to fit a hex-headed cap or screw.

A counterbored hole is typically used when a fastener such as a bolt or cap head screw is required to sit flush with or below the level of a surface.

To fabricate your counterbored holes, we would need to know the following information.

1. Major Diameter (finished diameter of the hole at the surface)
2. Depth the countersink is to be drilled
3. Which side of the board is the sink on?  Top or Bottom?
4. The finished diameter of the shaft of the hole
5. Is the bore and shaft to be plated or non-plated?

Because the sides of the hole are always parallel, there is no need to specify an angle.

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