retractable tool holder for threading

[Black Forest]

Anyone here use a retractable tool holder for threading on a lathe?

I cannot figure out how the cutting tool gets mounted. I have not seen one with the actual cutting tool mounted.

Here is a Ebay url with a retractable tool holder that I am referring to.

http://cgi.ebay.de/MULTIFIX-C-Schnellwechsel-Ruckzughalter-f-Drehmaschine-/120473270397?pt=Industriemaschinen&hash=item1c0cc4387d

[hardtail]

Looks like the lever retracts the piston on therefore bit......maybe operates on an inner cam?

That Tos you were previously interested in did it all on the crosslide.....

[Black Forest]

Now you tell me! I just checked the pictures of my soon to arrive lathe. No retraction on the cross slide that I can see.

I understand the retraction part. I just can't see the logic of the cutting tool. Meaning how it gets mounted or what type of cutting tool is used.

[djinh]

I think it holds tool bits like these:

http://link.marktplaats.nl/411828690

[Black Forest]

OK, Thank you. Now I see the logic of the holder.

[sconisbee]

I would say its a tangential threading tool, holding the tool bit vertical with the
form ground into the end of the bit. the idea being once its ground to shape you
only have to grind the end/top of the tool to sharpen it without messing up the form.

[DannyW]

Yes, they use "Komet" FG I, II or III (treading) inserts.

Ifanger inserts could/should work too.

Ifanger treading inserts PDF

The reasoning behind it is, that you can keep the dept settings on the cross slide undisturbed while retracting the cutting tool via the lever on the toolholder.
The tool holder can be rotated for relief, and is adaptable for any tread pitch.

Regards,

Danny

[Arthur.Marks]

Yup. You can see spec's here: http://www.brw.ch/shop/produkte/deta...oduktNr=315090

There is a third bit made by Aloris? It is not interchangeable with the Ifanger, but works on the same principle.

[Arthur.Marks]

Here it is: http://www.aloris.com/index.php/pages/no.8.html ...they're all essentially an update of the old, turret lathe, round form tools.

[Toolguy]

Retractable Threading Tool

Hardinge has a real nice setup for threading on their toolroom lathes. It's a cam with a lever and stops for in and out. Very simple, very effective.

[John Stevenson]

Take a re-read of this thread.

http://bbs.homeshopmachinist.net/showthread.php?t=38585&highlight=swing

[djinh]

I've seen those Komen/Ifanger threading inserts before, but never used them.

Are they the bees' knees? Are they not worth the carbon in the steel?

[oldtiffie]

I-Fanger

I've seen those Komen/Ifanger threading inserts before, but never used them.

Are they the bees' knees? Are they not worth the carbon in the steel?

They are very good - but expensive - and they are used and sharpened as for HSS by off/free-hand grinding on a common shop pedestal grinder using the guage/template supplied:

[oldtiffie]

No "crashing"

Anyone here use a retractable tool holder for threading on a lathe?

I cannot figure out how the cutting tool gets mounted. I have not seen one with the actual cutting tool mounted.

Here is a Ebay url with a retractable tool holder that I am referring to.

http://cgi.ebay.de/MULTIFIX-C-Schnel...item1c0cc4387d

Its a nice toy if you have only a few threads to cut.

I never needed one as I just re-set my cross-slide dial and add a bit for the next depth of cut.

As I said at:

http://bbs.homeshopmachinist.net/showpost.php?p=630761&postcount=6

regarding screw-cutting (metric or inch) on your metric lathe, with the half-nuts remaining engaged, you are going to have your hands full stopping the lathe (prior to reversing it) so as to avoid "crashing" the screwing tool into the job or the chuck.

Just use slow speeds.

[crancshafter]

Black Forest
Have a look at this thread over at MadModder:

http://madmodder.net/index.php?topic=2323.0

Best
CS