|Forum topic by SpotTheCat||posted 01-30-2012 12:01 AM||5696 views||1 time favorited||1 reply|
01-30-2012 12:01 AM
Here is a screw advanced box joint jig I made. I didn’t want to take too much time or money making this, so I tried to minimize both, with time being more important. Here are the things I did to make this cheaper/easier to make.
1. I used 5/16×1” hex bolts throughout. The only thing glued on is the front face of the bearing assembly. Everything else is bolted/screwed in so I can adjust it if needed. I didn’t have to re-make anything, despite the precision required in the final assembly.
It works great! I use a spring to register each turn. It runs a 5/8-8 acme precision grade screw, so I can make fingers in increments of 1/16”. It ended up costing $150 in materials. It could be made cheaper with better/local sourcing, but I bought most everything from mcmaster-carr for convenience.
Let me know if you guys have any questions!