Thin Stock Spacer

Here's one way to deal with stock that's thinner than the steps on your jaws. I call it a Thin Stock Spacer for lack of a better name (ok - I'm ignorant and don't know the correct name so I made one up). I've been told that some people call them spiders.

Alan Marconett did something similar for his 4 jaw.

Round Disc

I started out with a piece of 2" round stock. The size is pretty arbitrary. Bigger...

Machine Slots

I mounted the 3 jaw chuck on my rotary table to machine the slots. My jaws measured 0.313 in thickness, so I made the slots 0.320. The end mill is actually spinning at 2800 RPM but appears motionless due to the flash. Bigger...

Stop Chuck from Rotating

Somewhere, I've seen a gizmo for stopping the chuck from rotating. I haven't found it again, so I jury rigged this arrangment. Bigger...

Finished Spacer

This is the finished spacer. Bigger...

Mounted on Chuck

Here's the spacer mounted on the 3 jaw chuck. Bigger...

In Use

And here it is being used to machine a piece to thin to machine otherwise. Bigger...


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Copyright 2006 by Dave Hylands