Does anyone use sandvik 460 drills?

[Leon82]

We are cutting grade 5 titanium and the website says 4000 rpm at 19 ipm for a .177drill.

 

I tried it at 85% of that and it didn't like it. It walked pretty bad. 1 inch deep .177dia 1200psi tsc in a hammer shrink. No peck and no spot drill. It was at 13%load on the mam 72-35v.

Anyone use these in titanium before?

[rgrin]

No personal experience, but it looks like its just a plain jane single margin drill advertised as a "do it all" drill. My experience with "do it all" tools is that they can do it all, but usually not as well as a more specific tool would.  A double margin drill would typically yield better straightness, but have problems if you aren't breaking a chip.

What is your definition of walked pretty bad? Maybe consider spotting it first if you can?

[Leon82]

About .005"

 

I put a small spot in and it helped. I changed the drill and lowered the sfm. I'll see if it holds up

[Kyle F]

Another option (paired with spot drill) could possibly be advanced drill cycle and for the first 1-2x diameter depth could be 50-75% feed

[huskermcdoogle]

IMHO, that's too much feed for Titanium to keep a straight hole and for the drill to hold up.

I'd be .0015-.002 ipr and about 110sfm, for best hole quality I would use a Kennametal YPL drill, three margin, acts like a gundrill.  For the cheapest thru coolant drill option I would use a Kennametal GOdrill.  Marginless, won't bind up in the hole, usually very good bang for the buck.

[rgrin]

1 hour ago, huskermcdoogle said:

IMHO, that's too much feed for Titanium to keep a straight hole and for the drill to hold up.

I'd be .0015-.002 ipr and about 110sfm, for best hole quality I would use a Kennametal YPL drill, three margin, acts like a gundrill.  For the cheapest thru coolant drill option I would use a Kennametal GOdrill.  Marginless, won't bind up in the hole, usually very good bang for the buck.

+1 on lowering the ipr a bit. Didn't realize he was at .00475" ipr and thats a tad more aggressive than I would do.

Also, +1 on the GOdrills as far as tool life goes. I didn't check them for position, but I drilled ~600 holes with a 5/16" one about 1" deep in 4140 at 38rc and that tool is still in the machine looking minty. Finally a Kennametal product I like

[Leon82]

6 hours ago, huskermcdoogle said:

IMHO, that's too much feed for Titanium to keep a straight hole and for the drill to hold up.

I'd be .0015-.002 ipr and about 110sfm, for best hole quality I would use a Kennametal YPL drill, three margin, acts like a gundrill.  For the cheapest thru coolant drill option I would use a Kennametal GOdrill.  Marginless, won't bind up in the hole, usually very good bang for the buck.

Thanks.

 

I went back to the guring firex for now. I'll look at those

[Leon82]

I ordered a ypl drill I'll see how it works