FDMC - 2018_RedBook

dust is a problem, a dust extraction collet
nut can help facilitate removing dust out
of the cutting flutes so the tool does not
overheat and is not recutting chips.
Proper chip load

Any sign of heat or dark discoloration
in the flute of the tool is a clear indica-
tion of improper chip load applied to
the machining parameters. Heat will
rapidly cause the cutting edge of any
tool to deteriorate and become dull.

Chip load is a calculation based on
spindle rpm, feed rate and number of
cutting flutes.

Increasing the number of flutes, such as going to a 3-flute cutter instead of a 2-flute cutter in hopes of getting a better finish, is a fallacy. More flutes are only recommended when faster feed rates need to be achieved. The finish cut made by a 3-flute compression bit, under ideal operating conditions, will be no better than that of a 2- flute bit, run under its ideal machining parameters. For tips on how to determine the best chip load for tool longevity, visit guhdo.com/ chipload-calculator.

In summary, spending a little extra time to research cutting tool options based on material and application will go a long way to reduce tooling cost, waste and possibly even improve finish.

Tooling cost is not determined by what you pay for the bit. It’s determined by the cost of panels cut or the number of linear foot machined cutting the abrasive aluminum oxide content in melamine. It is best to make sure the proper carbide grade is selected based on material being machined.

With high volume panel processing,
it’s advisable to see if diamond tooling
(PCD) is an option to reduce tool cost.

With 2 and 3 flute PCD bits available now (they used to be limited to single flute tools on ½” diameter, thus limiting feed speeds dramatically), huge savings are often to be realized.

Source: Karin Deutschler is the president of
GDP|GUHDO USA. For more information call
800-544-8436 or visit GUHDO.com.
CUTTING & GRINDING
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