Quote Originally Posted by JAZZCNC View Post
But Boyan I have to disagree with you because I've tried many of the cheap cutters off Ebay and they are rubbish.!! . . . Cutters are not cheap when they go dull 2hrs into 6hr job or snap at 5hr58mins and wreck the job.!!
Drillman sells cheap endmils but are you 100% sure they are Kyocera or there rejects.? Maybe maybe not and it's this unknown that can't be trusted and when I'm cutting £300 piece of aluminium with 6hrs machine time I can't take that risk.
Who could be 100% sure.

But:
Come in original sealed boxes. Look perfect, measure perfect. Outlast many times, like 20x times in wood - Bosch, Freud and similar , which are triple the price. Definitely ultra sharp and fine polished. I have seen only Onsrud and 10 times more expensive ones with better polish.

With the machine i build for my friend i tested 3 straight flute one where the flutes are 25mm long and the bit is 1/4 in diameter, typical wood bit, so i routed aluminum with astonishing glass like result, 1mm deep pass with 0.8kw spindle at 25ipm. The precision was 0.01mm.

I have very flimsy machine as you know maybe, belt driven, v bearings, not for aluminum at all. I have done many 10 hour aluminum scratching jobs with 3mm bit without problem. So on that machine I use 1/4 3 flute straight bit at diameter depth for like 25 times x 2 hour jobs in very nasty hard pine that does not cut well , without loosing edge. And it chatters a bit all the time due to the flimsiness of the machine. So i guess on a good machine it would last forever.


Anyway, yeah, i have small box with 1000 euro worth of Kyocera bits at Drilman prices, so yes, they are that good. He sells Destiny bits for aluminum. I like to look at the Kyocera bits like more multi functional ones. plastic, wood , aluminum with one sharp cheap bit, thats the DIYer dream.

When i finish my build and finally have new machine, will know better.