RE: [CAD_CAM_EDM_DRO] Re: fitting ballscrew ends

>The idea I get from your posts is to make a sleeve that has the ID
>that would fit the OD of the balls. chuck up the shaft and with
>balls, slide the cup/sleeve over the ballscrew, with balls inside.
>now, the sleeve OD would be concentric to the minor dia of the
>ballscrew. hold that sleeve in the streadyrest and turn the bearing
>and pulley end of that section.

>Dave

Almost, Dave.

I guess the point is missed that the method would involve NO ballscrew
machining. In many cases the headstock hole would be too small, or the lathe
would be too short to use a steady rest. In the case of rolled screws the
land portion is a rough uneven burr. It cannot be used as a datum in a
steady rest.
(some ground screws can). After affixing the cap/end to the screw it could
be further
machined since it is now a good secondary datum to the ball race, but there
is no need. Complete all machining on the cap first.

So just the cap is machined. The screw never goes on a lathe.

I think a drawing is in order!

Les

Leslie M.Watts
L M Watts Furniture
Tiger Georgia
(706) 212-0242

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