On 28 Dec 2003 20:09:16 -0800, (Dave
G) wrote:

No clue. Does cast-iron "creep" under steady strain and 90degF
temperature swings?

Yes (although it's not strictly creep).

Saw tables are big wide, but thin, castings. Like all castings, they
cool down form the outside first and so they have a stressed skin on
the outside (a bit like tempered glass). Machining _one_ side of this
smooth gives an unbalanced casting that's almost guaranteed to warp.

It also used to be good practice to "season" large iron castings for
six months (or even a year) before machining them. This is no longer
done, for cost reasons. That said, seasoning is no longer as necessary
as it used to be, owing to modern metallurgy being different.

Personally I'd ignore it. If you get that worried, it's time to look
for basically better saws.

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