What does it mean to counterbore a hole?
Question:i'm putting together a saw horse and for the top i drilled a 5/16" hole to fit a bolt through that holds the braces for the legs. the bolt doesn't fit flush to the top but the instructions say to counterbore a with a 3/4" bit to 1/8" deep. am i just drilling into my existing hole with a larger bit? or is there something more that i'm missing? thanks.
Answers:
Yes, you are just making the hole bigger at the surface with a larger bit. The head of the bolt should fit inside the larger hole so it will be more or less flush with the surface.
For future reference, it is usually easier to bore the larger hole first. Drill your 3/4" hole first, 1/8 - 1/4" deep depending upon the thickness of the head of the bolt. Then drill your 5/16" hole all the way through. The smaller bit will tend to center in the larger hole as the bit will create a bit of a cupped bottom.
counterbore is sometimes used as a noun, it is more commonly a verb that describes increasing a hole's diameter by drilling a larger-diameter hole at one end to make room for the head of a screw or bolt.
In some cases, a counterbored hole is filled with a decorative wood plug to conceal the fastener's head. To countersink a hole is slightly different: this means to drill a shallow hole that will allow a screw's head to sit flush with the surface.
Here check out more info on this website:
http://www.hometips.com/articles/homencl...
The process is commonly called counter-sinking. It is just a larger hole at the top of the bolt hole that allows the head of your bolts to be below the surface.
TELL HER THERE'S NOTHING GOING ON HERE, THEN TURN ON THE GAME!
More Related Questions & Answers...