Gallery, Projects and General > How to's

Chuck Balancing......

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HS93:
Just a question , could you have drilled the holes in the back plate or would that not have worked as well, ?

Peter

doubleboost:
Nicely done David
I like your bed protector as well
Been going to make one for years
John

Stilldrillin:
Thanks for your comments, Chaps!  :thumbup:

Jason,

I never thought of the scroll position making much difference, compared to the mass of the body casting.

But, I spun it up in the lathe with the jaws set at several different diameters, also with the outside jaws.
There were variations of slight vibration, but nothing like there had been.

Stew,

I wondered at the time of fitting, if it was right, like that. But it never changed in it's accuracy.
So, I just accepted, that's how it was.......

My lathe is much lighter, and more sensitive to out of balance forces than yours. (I guess)!

Peter,

The adaptor is steel. With only the two, three hole stud patterns. I assumed it would be "self balanced". (As in, no casting flaws).......
The drilled area is the only part with any thickness of material, which could have an inclusion.

Thanks John,
The protector is only a piece of old t&g floor boarding. But it's saved the bed several times, when my fumbly fingers have let go.......


The chuck arrived in Scotland this afternoon. Perhaps the new owner might have some comment to make.......

More drilling to  follow.......

David D

DaveH:
David,

Just wondering does it (by any chance) hum as it goes round :palm: :palm: :palm:

 :beer:
DaveH

Stilldrillin:

--- Quote from: DaveH on November 07, 2011, 10:38:08 PM ---David,

Just wondering does it (by any chance) hum as it goes round :palm: :palm: :palm:

 :beer:
DaveH

--- End quote ---

It's Chinese Dave....... Not heard anything I can recognise!  :lol:


That little experiment set me up to tackle the next step.... A 125mm assembly.

The cast backplate, has the three and four hole patterns sharing a common hole. A long way out of balance........

With backplate only mounted, the lathe bounced!  :palm:

I mounted on a plastic plug.........




And started drilling......




The two central holes, go down to the spigot diameter! The lathe now, (backplate only), is super smooth, up to it's max of 2,500.


Before mounting the brand new chuck, I decided to strip, clean and grease. Very pleased I did!

This was the residue in the wash container.......




The new assembly runs very nicely. I'll let the grease settle for a few sessions, before any more hole drilling.....



David D

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