SBR12UU Bearing Block drill guide

thingiverse

After multiple attempts at drilling the holes for mounting the bearing blocks for my new printer designs build platform it occurred to me that I could design a little guide for the drilling. Hence the SBR12UU bearing block drill guide. I found that my drill would slip and so the alignment wouldn't be perfectly squared... now I should be able to print this guide, clamp it to my build surface and drill with accuracy. It is currently untested as my printer push fit connector died recently and I'm waiting on a replacement part before I try printing. The measurements were a bit tricky to come by... looking up even the exact model name would lead to some sites saying the space between the holes is all the same, others (and the one that I believe is correct) state that the space between the holes in one direction is 2mm less than the other. I would suggest printing this and placing it over the top of your bearing block to see if it matches the spacing, you may have a different bearing block or I may have chosen the wrong measurements to design around.