Are these Indexable Boring Bars or End Mills?

[erikmannie]

I bought these from @mattthemuppet2

If I had to guess, I would say that they would be used as boring bars. What do you guys have to say about these? Are they indexable endmills with a radius?

 

[erikmannie]

More photos:

 

[Martin W]

End mills

 

[twhite]

End mills

Second End mills.


Cutting oil is my blood.

 

[Cadillac]

The one picture shows the inserts cover the whole cutting surface on the end. Could they be inserted drill bits. I do think theyed be for endmills too.

 

[mmcmdl]

2 flute Insert drills . They drill great but throw a slug out of the bottom if you're doing thru holes . If you don't allow bottom clearance , you ruin the drill and inserts . They also have thru the spindle coolant capacity .

 

[mattthemuppet2]

hey Erik, they're ultra high feed endmills, like so:

AJX | MITSUBISHI MATERIALS CORPORATION

designed for pocketing and deep surfacing. Good for CNC mills, but still pretty handy on a manual, particularly on deep holes.

 

[GeneT45]

Nothing with multiple inserts is a boring bar*. Definitely endmills / drills.

GsT

*Waiting to learn differently..., but still, in reality, nothing.

 

[mmcmdl]

2 flute Insert drills . They drill great but throw a slug out of the bottom if you're doing thru holes . If you don't allow bottom clearance , you ruin the drill and inserts . They also have thru the spindle coolant capacity .

After checking my Valenites and Kennemetals , your spiral flutes do not continue the entire length of the tool . So I'll take my original statement out . The 2 flutes would drill although at a minimal depth .

 

[Toolmaker51]

Remove one insert, it could bore, though the helix is going to wad up chips in small diameter and/ or deep holes.
Boring bars exist commercially and shopmade with two edges that cut; but one is the leading edge, ahead and closer to centerline as a rougher. Normally, if fluted, straight and full length.