[SEL] Saw blade hammering

[Germoamer at aol.com]

In a message dated 9/23/2004 9:44:57 PM Eastern Daylight Time, 
rotigel at alltel.net writes:

<< > Somebody help us young folks know what's going on here:  What's hammering
 a
 > saw blade?
 > B² >>

Log cutting circular saw blades can wobble while at cutting speed.  This is 
usually from over heating/hitting some metal in the log/etc.  They need to run 
straight and true to cut properly.  Hammering is done by laying the blade down 
on something and taking a hammer and beating the saw at particular locations 
to make it run true.  The old folks used to lay it on a flat stump or section 
of log.  The hammering puts some stress in the metal which in turn takes out 
the wobble. Think about hammering a small piece of metal on one side down its 
length.  The more you hammer, the more the metal will start bowing.  Also, the 
blade is slightly dished toward the side of the cut, i.e., the side of the log 
from which the board is being cut.  This dish side also depends on whether 
you have a right hand or left hand cutting saw mill.  Many a person has 
purchased a used saw blade and found it to be not suitable for their mill, because the 
blade was dished for a different hand cut mill.  To my limited knowledge, 
hammering of saw blades if for filed tooth or insert tooth blades. 



Tom Schmutz
Concord, Va. USA
Germoamer at aol.com