HSK tool holders

[anderslr]

We are purchasing a large gantry type machining center. The subject of HSK holders has risen. This machine will have a spindle with 85 hp and up to 5000 RPM's. The manufacturer of the machine is recommending a HSK63 spindle. I was looking at HSK 80 sizes and I'm not finding very many standard holders. HSK 100 maybe a option.

What is everyone else using? Is HSK holders a good option? Our shop currently uses CAT50.

Thanks in advance,

Larry

 

[mrainey]

Read this for a thorough overview.

http://www.hskworld.com/articles/hsk_secrets/hsk_secrets.htm

Software For Metalworking

http://mrainey.freeservers.com

 

[DDRSS10]

In my opinion a cat50 would be a much better option. From the aplications I've seen the HSK's are more of a high speed holder, at 5000rpm a cat50 is more ecnomical and available.

Nick

"Speed costs money boys, how fast do you want to go?"

 

[Tmoose]

HSK has some genuine technical advantages, if your process needs them.

I don't have the data in front of me, but I don't think HSK 63 has as much "topplng moment" resistance (radial load resistance with a long tool) as a CAT 50.

Are you using CAT 50 at high speeds now, and are you experiencing tool sticking ?

Manufacturing HSK spindle noses is a TOUGH. Darned tough. If you are using automatic drawbars some of the issues are Multiple angles the taper and the jaw actuating area, drive key radiuses, key depths and widths..... The taper may have to be ground after spindle assembly. (True of steep tapers too). In fairly recent history there have been multiple episodes when reps from very reputable spindle/machine-tool/tooling/draw-bar companies were all on site with certified taper gages from different manufacturers, trying to work thru "problems," and everybody's taper gages gave different "answers." What the heck do you do then?

Manufacturing consistent, legal HSK tooling is better, but ..........

 

[opmanctss]

I would recommend Cat50. If you are not going to be changing tools all that often HSK is a good option. However as "TMOOSE" stated they are not cheap, and they are very tough to manufacture, and repair.

From a machine manufacturing standpoint, I would much rather sell you HSK, but from a user standpoint, I would stick with CAT50.

 

[EdDanzer]

I did some deflection tests on Kennametal KM joints, which are similar to HSK. Because of there hollow body there will be more deflection with longer tools.

 

[cayenne121]

whats up everyone. I am setting up a machine tools manage document.But I donot have a general standard. For instance shank,holder, arbor,sleeve etc. Do any of you could give me an good advice?

thank in advance