Over the July fourth holiday this year, I decided on an impulse project to build a gib screw locking tool for my Lewis Horizonal Mill. After a intro milling project, I discovered that the Gib locking bolts on my Lewis horizontal mill are absolute knuckle busters, due to their location. Depending on the axis, the locking screws are poorly be located. Some of the T-nuts I am unable to tighten at all.
I decided to build a T-nut locking tool, which will allow me to easily lock the ways. After a quick game of what size should I use, I determined that a 7/16 socket will be the correct size. I opted for a deep socket to allow the nearly built tool to completely seat down on the T-nut.
To complete this quick little project the socket is secured into a V-block squeezed in the vise. I used a 0.250 end mill secured in the 1/4 inch ER32 collet. Once I found the edge of the socket, I centered the end mill over the socket. Once the setup is complete, I made a quick plunge of 0.500 inches. The cut took about 1 minute for me to complete, and once done to new little took fit perfectly.
A sacrificial 7/16 deep socket turned into a nice little tool to help me lock the T-nuts. An eight inch extension allows me to tighten the T-nut underneath the table. This quick little project took just a few minutes to complete and will save my knuckles a lot of wear and tear.