3 hole drill jig

[Frank S]

I have always believed that anytime there are multiples of the same part which must be drilled requiring more than a single hole a jig or fixture should be made for repeatability.
Drill jigs also yield to the possibility of drilling through several parts at the same time as well.
This is the simple little 3 point contact 3 hole small part jig I was working on when the spindle bearings on my mill suddenly went south.
It consist of a top plate a bottom plate 3 equal length cylinders for locating the parts and holding the plates in parallel to each other


Since right now I only have to make 12 of these parts and my hardened drill bushings for the to outer holes had not arrived yet I decided just to forgo waiting and predrill the actual hole size for the parts in the jig rather than waiting I can always re drill the jig and add in the bushings later.
A lot of times I will make my own drill bushings then harden them as in the case of my previous left & right beam drill jig