When I started building my Gingery Lathe, the end goal was to have something similar to a 7×12 Chinese Lathe. Since those come stock with a small 3″ universal chuck, it was an early requirement of mine to at least be able to use one of those on my Gingery Style Lathe. With the lathe pretty much done, it was finally a good time to attempt mounting one to the lathe.
Step by Step Video of Mounting a 3″ 3-Jaw Chuck to my Gingery Style Lathe:
How To Mount a 3-Jaw Chuck to a Gingery Lathe Video
I typically would have cast a blank for the backplate, however I had made the Gingery Setscrew Faceplate Chuck in order to enlarge the 5/8″ bore of my Faceplate to 3/4″ for my new permanent spindle. Since then I have not used the Setscrew Chuck at all, and it seemed like the perfect size to use as a Backplate for the new 3″ 3-Jaw Chuck that I purchased for the lathe.
When turning down the backplate flange, I rouged it out to within 0.01″ and then took light passes until the flange was within 0.001″ of the chuck recess. I made sure to test fit the chuck to the backplate after each pass to ensure that the flange would not be too small ( need a good snugg fit ).
Locating the mounting holes for the chuck initially seemed as if it would be a difficult task, however it was actually quite easy to transfer the hole locations by marking them on the chuck body with a sharpie, mounting the backplate to the chuck using one of the faceplate mounting holes that already existed in the backplate, and then transferring the mounting hole marks from the chuck to the backplate. I then located the distance of the mounting holes from the chuck recess, and then transferred those to the backplate. It was only a matter of center punching, and drilling the mounting holes and the backplate was done.
Overall the results have been extremely good for a setscrew mounted backplate made out of aluminum. I’m able to turn a piece of 5/8″ CRS unsupported with no chatter taking respectable cuts on this type of lathe. I’m sure many will say the backplate needs to be made of steel, and I would probably agree. I mainly wanted to get the chuck setup quickly, and this is what I had on hand. I’m also so pleased with how it turned out ( ~0.001″ runout on the chuck body ) that I’ll be keeping this setup until I notice a reduction in cutting performance due to the backplate.
Next up hopefully I’ll be building a new Quick Change Toolpost for the lathe…