RE: [CAD_CAM_EDM_DRO] Re:Alternative shafts for linear bearings

Biggest problem is that the material is not hardened and you will soon
wear grooves and get ball dents in it. If you plan to use non-hardened
shaft you will be much better off with a plain bushing style slider.

Tim
[Denver, CO]
Sherline products at Deep Discount
Mach1 & DeskCNC with credit card ordering
www.KTMarketing.com/Sherline
Now selling Visual Mill 4.0

> -----Original Message-----
> At 02:12 PM 5/18/03 +0000, you wrote:
> >Drill rod as you mentioned has a tolerance of +/- 0.001" or worse.
>
> This is correct, however, some sources have Precision Drill
> rod with a
> tolerance of +/- 0.0005" for sizes between 1/8" and
> 1 1/2" in 3' lengths (Airgas/Rutland tool). Enco offers
> Ground & Polished
> Stainless rods in 6' lengths with a tolerance of
> +0.0000/-0.0005". McMaster-Carr also has precision ground &
> polished
> stainless rod with tolerance of -0.0005"/-0.001"
> Unfortunately, none have
> metric sizes in their catalogs.
>
>
> >It is not straight
>
> Isn't that the truth, Sizes over 5/8" seem to be ok in three
> foot lengths,
> but anything smaller sometimes looks like a pretzel.
>
> McMaster-Carr does have hardened and ground shafting in metric sizes
> though. Not inexpensive. A 13mm shaft 1200mm long is $76.00
>
> Don
>
> [Non-text portions of this message have been removed]
>
>
> Addresses:
> FAQ: http://www.ktmarketing.com/faq.html