Clean old 4 jaw or fit new?

thermite said:

Both, of course. Taking the opportunity to have two diameters to-hand. And/or to take one job off the spindle to do another, then put it back without disturbing the work. Have 3 or 4 6" 4-J alone.

Rust should clean up just fine. Hand push scraper for the 'cosmetic' flat faces. Kroil or such to get the movables out, then Evap-O-Rust, (or sugar) but NOT spoog tank for the rest of the curves and crevicles. If you even need that. I didn't. Brass / Bronze bristle brushes were enough.

Cleaning up a twenty-five dollah 150 mm rotab just this past week that had a nice Yamato Koki (pre Yuasa) Japanese critter under what LOOKED like terminal rust.

Not so much as a single scratch on the table or its Tee slots. Had been used its whole life with a Jacobs chuck Locktited (or similar) into its bore.

DS&G // Pratt should be similarly salvageable. Just bigger and heavier.

Go for it! Worst case, even with worn slots and jaws, one can shim a 4 Jaw and use it WELL beyond where a 3 Jaw would be scrap iron (Day ONE in my book, but I AM prejudiced..)



Bill

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thermite said:

I suspect it will clean up just fine with little work or money.

If so, either a smaller or larger chuck could be a better investment than a same-size Kita. Flexibility and maximum sane RPM thing. Many of us use 8" and 10" 4-J where a 6", 5" or even 4" would better suit much of the work and be easier to handle.

Bill

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