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Miter cuts

3K views 9 replies 6 participants last post by  joewho 
#1 · (Edited)
What is the secret to achieving a perfect miter cut? I'm putting trim around a window and I'm not happy with my cuts. I have a compound miter saw but the four pieces never seem to line up around the window correctly :(
 
#4 ·
To close up any gap in the face, try adjusting your compound miter box so that you "undercut" joint by about 1-2 degrees, leaving the saw set at 45 degrees. This will help the face join together before the back does, which you don't see anyway. Make sense?

If your installing casing on a door, put the head on first, then you can cut the legs a liitle too long and check your joints and make nescessary adjustments, (the legs usually end up a 1/4" to 3/8" off the subfloor. Hope this helps
 
#6 · (Edited)
To close up any gap in the face, try adjusting your compound miter box so that you "undercut" joint by about 1-2 degrees, leaving the saw set at 45 degrees. This will help the face join together before the back does, which you don't see anyway. Make sense?

If your installing casing on a door, put the head on first, then you can cut the legs a liitle too long and check your joints and make nescessary adjustments, (the legs usually end up a 1/4" to 3/8" off the subfloor. Hope this helps
I think this makes sense. I'm trying to locate the instruction manual for my Delta 10" Compound Miter Saw (36-075).

As far as doing doors, I'm ok. In this case it's the trim around a window.

Someone suggested that if I get the two sides cut exactly the same and the top and bottom cut exactly the same everything should fall into place?
 
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