Align the miter
center with one square centerline (A).
It's not easy to align and clamp miters
, especially when they're lubricated with a coat of slippery glue.
Even though one of the miters
will be a little longer than the other, it's easy to sand off the excess so the difference will be imperceptible.
Cut a 45-degree miter
on one end of the trim board.
It depends on what you intend to do with your miter
saw and how portable you need it to be.
Even on perfectly square corners, 45-degree angles won't always yield perfect miters
If the miters
have gaps, like the ones in the photo, adjust the miter
saw slightly and recut the miters
The key to accurate right-angle cuts is to square up the miter
gauge to the saw blade.
We used our table saw, but you could use a miter
That way, you'll be able to check fits and get crisp miters
at each corner.
At the outside corners, again use miters
and "test pieces" to get a tight fit.
How many times have you set your miter
box exactly on 45 degrees and cut miters
on a pair of moldings only to discover they don't fit?