Re: [CAD_CAM_EDM_DRO] Angular Contact Bearings and Ballscrews question

> Tom: I can't advise about the lead-screws in a mill or lathe, as I have

no

> experience with changing or "improving" those arrangements. However, I

did a

> large X-Y table with some LONG 1.5" dia. ball-screws, and was advised to

use

> DUAL angular-contact ball bearings, arranged in "opposition" at one end,

with

> "three bearing-thicknesses of space between the two bearings" in a single
> bearing-block. This worked fine, but I have NO clue how "important" any
> single detail of any of that was.
>

This sounds like the very common front wheel bearing setup on many FWD cars
today. Some mfrs use either tapered roller or ball thrust bearing packs
inter-
changeably depending on supplies available. These often come presetup with
the spindle attached.

> After thousands of hours, the "permanently lubricated, sealed"
> bearings are still just fine, but I kinda wish, somehow, there was some

way

> to re-lube those, now and then!
>

Most any auto parts place would have a doodad to do this. Looks a lot like a
CV joint center pin luber except it has a smaller diameter tube that looks a
lot like a hypo needle. Just pierce the seal and pump in a bit of grease.
About
$6 or so.