I'm having a heck of a time getting good tool life doing some slotting around a circular profile in thin steel plate (0.130" thick). 5" diameter circle on each part.
I'm currently using:
https://www.mscdirect.com/product/details/78978020
(OSG 44700211 3/16 3fl high feed style)
OSG recommended a similar tool with flutes that have an angle to aid in chip evac: 447200113
But the tool life just isn't what I want, I'm fairly convinced the carbide that OSG thing is made of is some kind of mithril/vibranium but the edges are just about chowdered up and it's leaving some nasty burrs after ~45 parts.
I've broken so many traditional endmills trying to slot the circle of these plates I really need some good advice. The only other tool I have had luck with is a 3 flute roughing endmill from lakeshore carbide--I do a reasonably steep (for me) 7 degree ramp into a short slot (3/4 long) through the plates in about 10 places per part, trying that same recipe on the larger circle was just another broken tool.
So, if you were in my shoes and had to use a 3/16 endmill to slot circles in 0.130" thick plates, what tool would you use?
I'm currently using:
https://www.mscdirect.com/product/details/78978020
(OSG 44700211 3/16 3fl high feed style)
OSG recommended a similar tool with flutes that have an angle to aid in chip evac: 447200113
But the tool life just isn't what I want, I'm fairly convinced the carbide that OSG thing is made of is some kind of mithril/vibranium but the edges are just about chowdered up and it's leaving some nasty burrs after ~45 parts.
I've broken so many traditional endmills trying to slot the circle of these plates I really need some good advice. The only other tool I have had luck with is a 3 flute roughing endmill from lakeshore carbide--I do a reasonably steep (for me) 7 degree ramp into a short slot (3/4 long) through the plates in about 10 places per part, trying that same recipe on the larger circle was just another broken tool.
So, if you were in my shoes and had to use a 3/16 endmill to slot circles in 0.130" thick plates, what tool would you use?