How Deep Is a Spot Face

Spotface – The cutting of a shallow counterbore, usually about . 0625 deep (depth symbol is omitted). A spotface provides an accurate bearing surface for the underside of a bolt head.

What is a spot face hole?

Spot facing is a mechanical drilling, or milling, process. After the initial hole is drilled, a larger well, or recess, is drilled into the material. The head of the screw or nail fits into this well. This allows the nail or screw to sit flush with the surface of the item that is drilled.

What is the difference between a counter bore and a spot face?

The difference between counterboring and spotfacing is that a counterbored surface usually has a shoulder at the bottom of the enlarged hole, while a spotfaced surface is flat and always at right angles with the axis of the hole.