Ballscrew Nut Replacement Parts

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10 Sep 2019 13:24 #144695 by pl7i92
we are very lucky in germany /europ as we got
bianca
called "tusnelda " the Shop of bearing Wonder in berlin
www.kugellagershopberlin.de/index.php?cP...obea81btbnrp2i0kunjg
if the link only gets to main indey see sidelist "KUGELN"
all kind of Balls all mesurments and a price of no extra

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11 Sep 2019 01:17 #144768 by andypugh

electrosteam wrote: Checked all the balls under a 200x microscope.
Half the balls are worn, but probably re-usable.


It's not unusual for half the balls to be a smaller size, and they act only as spacers.

I bought a set of oversize balls from Amazon a few years ago. But I don't seem to be able to find the vendor now.
(They were "Toolsupply" on eBay and Amazon.)

This is one option: www.baltecballs.com/inventory/February/Ball_0295_in.htm

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13 Sep 2019 12:13 #145052 by electrosteam
Got some 1/4" balls from a local bearing supplier.
The originals were 103 x 6.365 mm
Did some trial ball loads and mount to screw, it is amazing what some simple jigging can do.

The 108 x 1/4" balls are definitely loose.
Nut drops under gravity the full length of the screw.

The 6.365 mm plus 1/4" to make up to 108 seem reasonable, but I think still loose.
The nut does not drop the full length under gravity, but it does rotate many turns before stopping.

Now need to guess the correct size required and purchase (overseas for me).
Prices appear to be about USD 0.72 for 6.37 mm balls, so significant cost into Australia.

What allowance should I allow for lubricant and heat ?
John

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