re:Re: Pre load specification (leadscrew bearings)

Wally,

Now you know why there are so many trying "alternatives"! :-)

First, look into the "some sizes are cheap" method.
Then try the "some mfrs./distributors are cheaper" method.

If these fail to meet your needs, you have to either bite the bullet,
or go explore some of the options of this thread.

Keep in mind that to a BEARING distributor, these are "specialty"
Items. But to a leadscrew supplier, these are the "norm". May find
some deals if you look around. And do look in the surplus arena, if
you can.

Hope this helps.

Ballendo

BTW, the "shimming" is not that difficult. But if you are talking big
machine, big loads, do it right. "bite here, please... This won't
hurt a bit"

>Thank you for pointing out my oversight on face ground angular
>bearings. I rechecked my catalogs and found one of them has ground
>angular bearings and the other one does not have ground faces. The
>price differance is staggering. For 17 or 20mm bearings non ground
>$17 to $24USD each. For face ground 17 to 20mm $240USD each.
>
>I did not want to deal with the preload, shim issues....But i am not
>going to pay $240 for each bearing.........

>Time for a rethink of the ballscrew mounting method. Unless you
>have a source for inexpensive face ground ball bearings.
>Wally K.