What is a proper speed for countersinking?
Some people recommend slower that it's suppose to be for this diameter
but what is a "right" speed for counersinking?

In article .com, Alex says...

but what is a "right" speed for counersinking?

Slow it down until it stops chattering.

Jim


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"Alex" wrote in news:1137615041.876778.293340
@g49g2000cwa.googlegroups.com:

What is a proper speed for countersinking?
Some people recommend slower that it's suppose to be for this diameter
but what is a "right" speed for counersinking?


I usually csk at between 60 and 100 rpm.
Remember that your sfm calculations won't be very accurate because you
have both a continuously increasing diameter, and a continuously
increasing tool surface contact. The higher the surface contact of the
tool, the higher the horsepower required, the higher the loads on the
tool and workpiece and the more rigidity you need, which is why it
doesn't start chattering usually until you get half way or more into the
csk.

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Anthony

You can't 'idiot proof' anything....every time you try, they just make
better idiots.

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