Re: [CAD_CAM_EDM_DRO] The cutting edge?

In a message dated 7/9/99 6:23:21 PM Hawaiian Standard Time,
timg@... writes:

<< RPM is a function of cutter diameter. Cutter speed is actually calculated
in
surface feet per minute and then you need to divide that by your cutter
circumference to get the RPM. Looking in my Armchair Machinist program it
gives the SFM for aluminum as 550 SFM for high speed steel and 1100 SFM for
carbide with an 1/8" bit that works out to about 16,000 and 32,000 RPM

>>

Tim,
Good point. I for some reason assumed a cutter in the 3/16 to 1/4" range.
Peter