Bearing Mount (Pillow Block) Ver 2

thingiverse

This is a derivative of http://www.thingiverse.com/thing:4281 . That mount, which I submitted several months ago, would not work with 80/20 aluminum framing. There are 2 differences between that version and this one: Wider body to straddle the T-bolt channel on the 80/20 frame piece. Bearing mounting holes increased to handle M6 sized bolts. This bearing mount was designed to support an 8mm leadscrew (the same one used in the MakerBot CC). A mating 80/20 NEMA17 stepper motor mount ( http://www.thingiverse.com/thing:5391 ) matches the shaft mounting height, 21.5mm, to support the 8mm rod level. Instructions An HBP is suggested for building this 65mm(W) x 40mm(H) x 17mm(D), but I printed the other one fine without it. The room temperature was 30F higher 4 months ago is the only difference I can think of. INFILL DENSITY in the SkeinForge FILL menu was set to 0.2 for my copies but may be set higher depending upon the user's end application. There is not a lot of work to do on these after printing - Scrape out the bearing opening of excess plastic, then press fit the 806 ball bearing in. If you are going to do any sanding, do it before you install the bearing. The fit is tight, but you can carefully add a drop of superglue between the mount and outer rim of the bearing if desired. The 2 block mounting holes might need a small amount to material removed from the holes. After clearing the holes with an X-acto knife, I screwed in the 6mm (1/4") bolts. Sanding with 220A gives the object a better look, but it will work fine without sanding. Use flat washers or cap headed bolts for mounting to increase the surface area holding the block. A small headed bolt would put all kinds of stress on the mounting holes when tightened.