Extrusion Corner Blocks
by bdring, published
I made these corner blocks for Misumi 20mm x 20mm extrusion. Misumi sells similar blocks but they are close to $6 each and I need a lot of them. I also designed it to have one screw compress the layers to make them a little stronger.
This type of corner block allows you to use the slots for acrylic panels.
There are three versions. A standard corner and two corners (left and right hand) that act as feet.
I used them to make a nearly air tight spool holder. The extra parts for that are here too.
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You need to tap the center holes of the extrusions to 5mm. The hole is already the correct size for that.
The corner blocks require low profile head screws. I used button head screws.
Spool holder (I'll public a STEP file soon)
The little clips are used as wedges install the acrylic panels,
The spool rolls on 1/2 EMT electrical conduit with 5x15x5 bearings pressed in. The handle is made from the same material.
more details here...http://www.buildlog.net/forum/viewtopic.php?f=16&t=1625&start=40#p15958