Challenge #1: Case Mitre's??

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Blog entry by grayman posted 12-02-2013 01:49 PM 667 reads 0 times favorited 4 comments Add to Favorites Watch
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I am struggling with case mitre’s for boxes. Yes, I have built a mitre sled; it doesn’t work for pieces that must be mitre sawn on the “flat”. It’s fine for frame pieces but when it comes to anything greater than the 10” table saw can handle, as in a box, no matter how accurate I gage blade tilt the corners simply won’t pull together square. I can burnish the corners but that doesn’t provide a dead square and tight 90’ corner. It simply covers the degree of error.
Thinking of a 45’ jig that holds the work at that angle to the straight-up and squared blade and incorporating the rip fence to run it past the blade. I’m using a Bosch contractors saw (with a good blade) not a cabinet grade machine and just getting the blade to tilt to 45 was a whole lot of work; which I’m rather critical of.
Other options: forget case mitre’s, use dovetails, box joint, or interlock. Chamfer bit on router table: failed. 45 on jointer-failed. 45 on sliding mitre saw-forget it.
Any experience or tried & tested jigs here?

4 comments so far

View shipwright's profile


7094 posts in 2221 days

#1 posted 12-02-2013 02:40 PM

Have a look at this blog. It is actually a web album with captions but there is a simple sled in it that will work for you. The veneer matching on that project required the mitres to be perfect first time with no opportunity to adjust later. ...... and it was done on a 1950 ShopSmith 10ER.

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fibreglass trees.

View gfadvm's profile


14932 posts in 2113 days

#2 posted 12-03-2013 01:48 AM

I use my stock miter gauge and tilt the blade to EXACTLY 45 degrees using a Wixey digital angle gauge. Use a stop block to assure that your pieces are exactly the same length.

That Wixey was an inexpensive tool that cured my ill fitting miter problems!

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View BJODay's profile


512 posts in 1366 days

#3 posted 12-03-2013 02:47 AM

that is an amazing pictorial.


View Brad-Scott's profile


11 posts in 1328 days

#4 posted 12-03-2013 02:40 PM

I have wanted a Wixey for many things and just haven’t been able to make the expenditure (too many medical issues). I am primarily a turner. I just finished building a steady rest and fiddling with compass dividers for 120” (It takes six marks) so I have been tied between the Wixey and a face shield. Hmm. My maple globe blew on me a few days ago; better go with the face shield this time round and dovetail the boxes. That’s a simple solution and pretty quick at that. These need to get in the mail from NC to AZ soon.
Thanks so much. This is a great site.

-- Brad~Scott

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