This only took 5 freaking hours! Arrrgh. This is a lock for my brand new barbell. The gym I go to is awesome but there bars suck. I understand why they have the bars(longevity) but the knurling sucks. So they allow members to bring and store their own bars there. Apparently some people’s bars have been used without permission so one guy who is an engineer designed his own lock. I took inspiration from his design. He was going to send me a .DXF of his design but has been super busy and my bar arrived by UPS yesterday so I made my own.

The plates are 3/8 1018 steel. The pins are 1/2 1018 round stock. The tube is 2.5 DOM .188 wall. The bushing at the end is UHMW.