Re:Alternative shafts for linear bearings

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

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