Carbide feeds and speeds issues

[dreammstr6]

Is this still the HTC endmill? I would strongly suggest trying something from a more established brand. That sort of failure pattern is too similar to what that other guy was describing. You might try using an air blast rather than coolant for a part or two also so you can see what is going on better.

Different tooling. I don’t remember which brand that was. Not wrote on it

 

[dreammstr6]

Is this still the HTC endmill? I would strongly suggest trying something from a more established brand. That sort of failure pattern is too similar to what that other guy was describing. You might try using an air blast rather than coolant for a part or two also so you can see what is going on better.

On the note of different brand. Was acting very similar until I increased the fpt. I went up to .001fpt same program I used for htc.

 

[dreammstr6]

Just tried a brubaker tin coated hss bit. Even it doesn’t want to cut this metal right. I have some widia hanita varmill carbide bits. Going to try

 

[eKretz]

Just tried a brubaker tin coated hss bit. Even it doesn’t want to cut this metal right. I have some widia hanita varmill carbide bits. Going to try

Try upping the feed some more too.

 

[dreammstr6]

Try upping the feed some more too.

Even the widia hanita which was tialn didn’t like it. I finally got it to run halfway. Running 25ipm 5511rpm 0.323 axial doc 10%radial and it still complains some. But running. It has to be across the pond junk steel. Nothing acts right. Oh I am drilling a through hole of 17.5mm for chips and the endmill to start in.

 

[eKretz]

It is increasingly sounding like it. Good material is a pleasure to work with. Bad (especially so if inconsistent) material is a glaringly large PITA.

 

[dreammstr6]

It is increasingly sounding like it. Good material is a pleasure to work with. Bad (especially so if inconsistent) material is a glaringly large PITA.

Well that endmill shattered. My vote is junk steel. Almost done with the junk.