04-17-2014, 08:17 AM
(This post was last modified: 04-17-2014, 08:21 AM by Sunset Machine.)
I'm making something similar myself using a chuck table. The table is threaded 3/8" x 16 clear though, it's a 2" dia chunk of CRS just a tad shorter (1/4") than the chuck jaws. One end is bored out a little to clear the hole in the adapter I'm making. It'll come within .002" pretty easily using a 3-jaw (I just checked - faces parallel within a few tenths, diameters concentric within .0015". No dial indicator was used in the setup).
The details:
There's a bit of allthread though the headstock. A nut & washer on the outboard end, the table is loosely secured by the chuck jaws and the allthread drawbar tightened up good. Now you have a flat surface just shy of the jaw tips. Open up the chuck and in goes my adapter-to-be with its pre-drilled bore. A short bolt through the adapter secures it flat to the chuck table and the jaws snugged up. Remove the bolt.
The part is faced, flipped, bolted, mounted, unbolted, faced again and bored. The bolt re-inserted, tightened, chuck jaws loosened and drawbar removed. The chuck table with the adapter attached is pulled out of the jaws until the part is clear, and then the jaws are wound down around the body of the chuck table. The part OD is then turned. Done.
Handy for making precision washers/spacers/etc.
The details:
There's a bit of allthread though the headstock. A nut & washer on the outboard end, the table is loosely secured by the chuck jaws and the allthread drawbar tightened up good. Now you have a flat surface just shy of the jaw tips. Open up the chuck and in goes my adapter-to-be with its pre-drilled bore. A short bolt through the adapter secures it flat to the chuck table and the jaws snugged up. Remove the bolt.
The part is faced, flipped, bolted, mounted, unbolted, faced again and bored. The bolt re-inserted, tightened, chuck jaws loosened and drawbar removed. The chuck table with the adapter attached is pulled out of the jaws until the part is clear, and then the jaws are wound down around the body of the chuck table. The part OD is then turned. Done.
Handy for making precision washers/spacers/etc.