Re: [CAD_CAM_EDM_DRO] Re: re:leadscrew bearings / machine design

If you want to spend the money, you can get them. It might take some digging. Just specify class 7 or class 9 bearings...and be prepared to PAY!

Smoke
-----Original Message-----
From: dougrasmussen@... <dougrasmussen@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Friday, October 27, 2000 1:33 PM
Subject: [CAD_CAM_EDM_DRO] Re: re:leadscrew bearings / machine design


Smoke,

Actually, I don't think any "GOOD" lathe headstocks use Timken type
bearings. I'm pretty sure they all use angular contact bearings.

I've been told tapered roller bearings are not made in the precision
necessary for high end lathe spindles. Not sure if that's true. But
I don't recall ever seeing any in high precision applications.

doug

--- In CAD_CAM_EDM_DRO@egroups.com, "Smoke" <Smoke@5...> wrote:
> A GOOD lathe headstock uses Timken type tapered roller bearings for
both thrust and radial capacity. Roller thrust bearings will always
provide higher capacity than ball bearings!
>
> Smoke
> -----Original Message-----
> From: JanRwl@A... <JanRwl@A...>
> To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
> Date: Monday, October 23, 2000 6:33 PM
> Subject: Re: [CAD_CAM_EDM_DRO] re:leadscrew bearings / machine
design
>
>
> If you REALLY need some decent thrust capacity, and good "radial"
capacity
> (such as a lathe's spindle would require!), suggest you consider
"angular
> contact" bearings in pairs. These are also available in single-
unit
> "double-row". They make engineering a big-ol' complicated piece of
'chinry
> straightforward, which is a boon to those of us who kain't spel gud.
>
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