Originally Posted by
garyb
Yes Clay I can see why its screaming, you are way off on the chipload for that tool.
The grind for that tool is designed for hard/soft woods which runs a lower feedrate, and not recommended for the plys your cutting, the recommended is the 60-100 series which includes the MW, C, MC and PLR tools.
For the 57-924 the chipload is .007 You didn't say, so I will assume your using .375 stepdown, at 14000rpm that would calculate your feedrate to 196ipm (3.2ips). At the 6ips (360ipm) you have been running at would calculate your rpm out to 25700rpm not the 14k you have been using.
Now if your cutting in one pass and not reducing the chipload then your multiplying the problem so the tool is screaming and burning up long before its expected life.
If you don't know how to figure your feeds and speeds the following are you 2 main formulas, you will find these at the bottom of the chipload charts in the back of the Onsrud catalog as well.
Feedrate (ipm) = RPM x # of cutting edges x chipload
RPM = Feedrate / (# of cutting edges x chipload)
Now these are based on the stepdown of 1 x the tool diameter, 2 x the tool diameter reduce the chipload by 25% and by 50% for 3 times the tool diameter.
All Onsrud tools have a chipload figured by the factory for that tool, as noted you will find that list by material in the back of the catalog which you can have mailed out or download as a pdf.
Gary