Looking for solid carb cutters for deep narrow cavities.

[MetalFlake]

I have an aluminum cavity job that requires some skinny cutters. The cavity tapers from about .700wide to .312 and is almost 5" deep. I did get a part out using straight shank carb endmills but It was slow going. Does anyone have a line on tapered shank carb endmills that they like to use on this kind of stuff. I don't want to do special grinds unless it's not too $pendy.

 

Thanks!

 

MF

[d00d]

Is the cavity made of aluminium? or is it a hardened steel cavity to cast Aluminium?

[MetalFlake]

Its all alum d00d. It starts out as plate. I should mention that the profile is tapered in 2 planes....so it kinda makes a conical taper and gets tighter as it moves to the right (in this case) and down.

[jeff]

I gather that this is not a thru cavity?

Can it be plunge edm'd?

Just a thought.

[Jean-Simon]

There's OSG who have the shrink fit with all kind of holders for that type of work but you'll pay for it but the thing is... when you use them right, you'll never see the end (of the tool) HTH!

 

 

Simon

[mold100]

Look at garr they got some long cutters with shor flutes, I order 6" long 3/8 they might have smaller dia. tin and tialn coated is cheap

[kamman25]

Would the Iscar multi-master work for you? they have carbide shanks that long that taper down that small.

[jeff]

I always wondered about those shrinkfit tools.

How do you get the tool out of the holder?

[steve f]

Heat up the holder.

[Hacsta]

That's Hot

[MetalFlake]

Mold100,

 

I did use all garr cutters and they worked fine just that they are all straight shank. So a .3125dia hanging out 4.8" is quite the noodle and the run time is higher than the owner wants to see. Maybe I'm trying to work a miracle here I don't know. Idealy, a tapered shank I think would get me closer but I cant find anthng off the shelf that is near long enough. Actually Mitsubishi has some but they're all Japanese stock that will take 6 weeks to get here --bummer.

[jctjct]

Does the cutting edge need to be tapered, or just the shank?

[jctjct]

I don't have an Iscar book in front of me, but I know the Multi-Master line offers tapered shanks with a variety of screw in cutting heads.

[rsbeadle]

Look up a company called velocity. I have only recently come across this company. They sell tapered end mills used for cutting ribs in tool steel for mold industry. We cut ribbs on the mills instead of elox. Saves time and money for carbon. check it out. 1 degree cutter with .070 bottom cutting 2 inches deep in ribs. I'm not sure about cutters that big to cut 5 inches deep though.

[MetalFlake]

Thanks to all for the helpful responses. Looks like the Iskar multi master may be the ticket. YESSSS!

 

MF