|
Posted by Harry K on March 15, 2007, 10:16 pm
> I have a brick wall, about a 1/2 foot high, that used to surround a
> playset that got burned down. The brick wall had 2x10 boards on the top
> of the wall that created a ledge.
>
> There's metal bolts in the brick to hold the board down. In the current
> burnt boards, the person that built it put a "sink", for lack of better
> terminology where each bolt was located. IOW, a round hole was cut in
> the board at each bolt location that went about 1 inch deep. I guess
> this was done with a hole saw.
>
> Let's say the holes were 2 inches in diameter, cut 1 inch deep, then the
> next inch drilled creating a hole the bolt can slip thru. When I
> tighten the bolt, the bolt will rest at the bottom of the 2 inch hole
> cut I made.
>
> If I cut a circle in the board and cut 1 inch down, how do I get that
> piece out of the board? Do I use a chisle? Or do hole saws permit me
> to create a "sink" that won't go thru the entire board?
>
> Thanks for any advice you can provide.
The hole you are talking about is a 'countersunk hole' so the bolt
head won't stick out above the lumber surface. Drill the countersink
first then finish with the 'bolt size' bit.
The common tool used is a spade bit, just a flat chunk of meteal
sharped to cut with a point in the middle and a rod up to go in the
drill. The most common brand is "Speedbore" Just ask for that at the
store. I don't know how big they make them but I know I have a 1 1/4"
and think I have a 1 1/2". Unlikely that you would need one anywhere
near 2". What is needed is one big enough to clear any washer you use
plus make sure that a socket for those bolts will fit down in there.
Harry K
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap