Mast Slug Drilling block (Fits Tack Tick compass mount.)

thingiverse

Instruments are typically held to sailboat masts using slugs in the sail track. The slug gives the equipment something to screw to that can be adjusted up and down. A slug is usually a piece of round aluminum bar-stock with threaded holes drilled crosswise in it. How does one align a drill bit to drill these holes? Using a Mast Slug Drilling block. This one will align 3 holes in a 3/8" x 2+" piece of aluminum bar-stock. Perfect for mounting a tack tick compass mount. Assuming you've lost the slug that came with it and want to make a new one right now. Instructions Started with default setting on Replicator 2 then bumped up the shells from 2 to 4. I figured I wanted more strength in the skins. Rotate it so the 3/8" hole is up and down. Once its printed, your going to need to run a 3/8" drill through the main clamp hole 'cause it'll shrink some. Also run the 8-32 tapping drill through the top holes for the same reason. The two crosswise 1/4" holes ore for clamping the block to the 3/8" bar. If you are making a slug for a tick tack, the length is the length of the drilling block. Handy huh?