Need suggestions for holding 1" x 1/8" disk for face milling and drilling

[jrdarrah]

I need to drill three holes in a 1" x 1/8" brass disk. The two smaller holes will be tapped for a 4-40 thread. the center will be drilled for a 5/8" hole. This is one half of a AA battery cover. The lid will sit on top of this and will have the two smaller holes but be solid on top. Given its use, I don't need great precision except the small holes need to line up. Since this is only 1/8" thick I need some ideas, maybe for a jig, to hold this in the vice so I can drill the holes and optionally surface mill the top in such a way that I don't turn the piece into a mini frisbee.

 

[Seedtick]

Use the 4-40 threaded holes to hold it to your fixture and take itty bitty bites until you face it down to the right length.
Greg

 

[ErichKeane]

I'd probably make the disk itself with the center cutout on a lathe, then part it to size. You can use parallels behind the jaws to get it flat when you flip it over, and though 1/8" of hold isn't much on a chuck, its doable.

Then, just use a pair of V-blocks in the mill plus some parallels to hold it in the vise to drill your holes.

 

[Nutfarmer]

Super glue it to a machinable and expendable sub plate. Machine it to size a little at a time. When finished release the part with a heat gun.

 

[EricB]

Super glue works so well for small stuff.

 

[Jimsehr]

Super easy using a 5c collet.