Did you buy them on eBay
I bought some carbide endmills and they were snapping like popcorn
I believe that sometimes they unload the poor carbide on ebay.
when i used the same size cutter from MSC, it took the load no problem !
On 4 flute plunges, I never go deeper than 1/2 the cutter diameter.
A 2 flute will go 3 diameters, but those 4's cannot clear out the chips.
rich
I run down to 3/64 (.045 )too on carbide . |