Bolt Hole Sizer (for any bolt measurement)
thingiverse
This is a simple bolt hole sizer I figured I would upload. I am currently using this to figure out what size hole I need to extrude cut into an air engine I am designing. I am currently using standard (English Imperial) machine bolts (sorry I don't currently have the bolt size I am using). This is purely a test to see what size hole will fit what bolt. I printed this with 50% infill to make sure the bolt holes are strong enough. Make sure to print with multiple walls since the bolt threads will be biting directly into the plastic.
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