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Country Discussion Topics
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Les Water Cooled Saw Blades
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Willy-N    Posted 02-19-2004 at 21:45:47       [Reply]  [No Email]
This is what I found. They cool blades with water on some saws. Here is a quote. Mark H.
Sawblade cooling is indeed often used commercially for cooling and lubricating the blade. The cooling actually allows the blade to contract slightly and thereby maintain its flatness. (As a saw spins faster, it first takes out the dish--also called tension--and then will get wobbly if there is not enough tension.)
Also, if the saw heats at all, the tension required to run flat increases. To offset this heating effect (which is common in hammered teeth and the swedging is not as effective as using an inserted tooth on a circle saw) water cooling on the rim is used.

However, as stated above, a 24" diameter saw should not run very hot and even if it does, the wobble (if properly tensioned) would be minor. Cooling is much more critical when running over 54" diameter headsaws.

Cooling is often used on wide band saws as well.

Gene Wengert, forum technical advisor




Les    Posted 02-20-2004 at 03:03:08       [Reply]  [No Email]
Hmmm. Never heard of such a thing. Must be these modern ways of doing things. I worked in the filing room as my first job in the mill (I was recovering from a broken back) so I understand a little about tension and swaging (not "swedging", unless the spelling of the word has changed in the last 20 years ;). Maybe the modern saws run so fast that they heat up, but any saw that I was ever around did not need to be cooled with water if it was properly fit. The swage (or the "set" in the case of a cross cut saw such as a cordwood saw) is sufficient to keep anything from rubbing on the saw and heating it up, thereby causing poor performance. If something is rubbing on the saw, there's either not enough swage or set, or something isn't lined up right. Or possibly the feed is so fast that the gullets of the teeth are packing sawdust.
Saws and sawmills are fascinating to me. There's lots of ways that things can go wrong and I believe we found most of them at the mill where I worked.


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