fluid also prevents chip welding to either the blade or the parent
material by chemical and/or thermal interface.
When chips weld to the blade, the tooth form is changed
resulting in cut deviation or lack of penetration. If the
chips weld to the parent material, the usual result is a stripped
that not all cutting fluids are suitable for all materials to be
lubricates the blade and, more importantly, the chips as they pass up
into the gullets of the blade. Cutting
fluid tends to cool the blade and the material being cut by absorbing
heat. Heat is always
generated because “work” has occurred from the cutting action as
well as from friction.
Note that when wide
material is being cut, the blade gets much hotter than when narrow
material is cut. This
happens even when both materials are cut at the same rate in square
inches per minute.
Cutting fluid is so important it cannot be over stressed.
A good quality cutting fluid in a band saw is one of the most
important factors in straight cutting.
If cutting fluid is unable to cool the blade teeth, they will
soften and become dull. If
the cutting fluid is distributed to only one side of the blade, the
opposite side will become dull. This
will cause the blade to cut toward the side that has the most cutting
fluid and the cut will be crooked.
If we compare sawing to milling, we immediately see that in sawing there is much less room
for the chip. The chip must lodge in a small place between the teeth and be
carried smoothly out of the cut.
selecting a cutting fluid, pick one which is of high quality.
Without proper cutting fluid
one of two things
First, the chip may become welded to the tooth.
This will change the form of the tooth, which, in turn, will
change the amount of force required for the blade to cut. The result
is an unbalanced blade that will produce a crooked cut.
The second possibility is that the chip will wedge in the cut.
Since the chip is work-hardened and harder than the stock from
which it came, the blade will cut into the stock beside the chip.
Again, the result is a crooked cut and a dull blade.
In selecting a cutting fluid, pick one that is of high quality.
Avoid thinly mixed soluble oils.
Some of the new synthetic oils are highly satisfactory in
If optimum cutting and blade life are the desired result, before
selecting a cutting fluid and mixture for your saws, ask yourself the
question, “Would I tap this material with this fluid?”
Saw owners and operators may believe that we are over stressing the
importance of coolant as a factor in good blade life.
But it is a fact that we have learned from more than 30 years
of band saw experience, in the field, in our own shop, and in tests
that we perform regularly
If you have additional
questions about this topic, call or e-mail us today.