Miter frame clamps - small, weighted tightening

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Blog entry by MrLaughingbrook posted 06-30-2019 10:17 PM 792 reads 0 times favorited 2 comments Add to Favorites Watch

I wanted to assemble some very small mitered frames and my band-clamp was way too big. I decided to make a small miter frame string-clamp.

Start with a block of 3/4” Ultra High Molecular Weight (UHMW) Polyethylene:

Cut a 90 degree V on the long edge and sliced off 1/2 thick pieces:

Drill holes overlapping the V to give corner relief. Add a 3/16” hole as a path for the string on the 90 degree from the face:

Chamfer the holes and trim to size the short length of three of the corner blocks (leave one long for mounting as a fixture):

Tie a weight to the string (thread the other end through all four corner clamps and make a stop on the other end, I tied on a #6 washer):

Drill holes in the face of the long corner block for mounting on a platen, string around the blocks (twice through the fixture) and insert the glued frame, lower the weight to clamp and you will still have both hands free for minor adjustments:

I like to use CA glue so the process of assembly is very quick.

-- MrLaughingbrook

2 comments so far

View kdc68's profile


3013 posts in 3438 days

#1 posted 06-30-2019 11:03 PM

Pretty clever. Well done!

-- Measure "at least" twice and cut once

View lightweightladylefty's profile


3658 posts in 4873 days

#2 posted 07-02-2019 05:14 AM

I really like your idea. Thanks for sharing.


-- “Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety.” Benjamin Franklin -- Jesus is the ONLY reason for ANY season.

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