Details 13-15, the Locking Levers and Screws
I decided to challenge myself here a little and instead of making the two piece lever/screw combinations as presented in the article, I chose to make mine in a single piece and again out of the hardened Stainless Steel. So this task begins by knocking down some round stock. My blanks will be 2.5″ long – that’s 3/4″ longer than the Spindle Housing Lock Screw to give me something to chuck on in the lathe.
A trip back to the bandsaw removed most of the waste, and the mill was used to cut the sawn surface down to 0.435″. Having milled this stub square will facilitate indicating it in in the 4-jaw chuck on the lathe.
The two blanks are ready for the lathe. The shank should be about 0.060″ oversize so it’s not incredibly critical to get it exactly centered in the lathe. The remaining sawn surface will get faced in the lathe to form the bottom surface of the lever.
Starting on the longer Spindle Housing Lock Screw, the square shank portion was indicated in using an independent 4-jaw chuck. A scale would have worked just as well here since there was 0.03″ per side to work with.
With the center in place, its a simple job to turn the screw and face the bottom of the lever. While the shank portion of the screw was turned to 0.250″, here I’ve just reduced the area that will be threaded to ø0.246″.
To get started on milling the lever portion on the lock screws, a collet vise was installed on the mill and a dowel pin was used to indicate the collet chuck since the shank portion of the levers will not be accessible when they are clamped up.
Disclaimer and License
All material, including the CAD drawings, relating to the construction of the Cut Knurling Tool presented on this site is free to use any way you see fit. However, no guarantees are made regarding the accuracy or correctness of the material presented here.
(CAD drawings are in SolidWorks 2013 Format)