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rockrat
08-22-2006, 08:17 PM
Ok, its a long story but the meat of it is as follows.

I have a box of collets, purchased off ebay, that are marked 5v. The seller was nice about the transaction so far and has been honest.

Now, I have also a collet from Harding marked 5v. This collet works. The hardinge collet is perfect, the box of collets that I just got are different. The newer ones are very short and the diameters are a bit different. They do have markings that resemble a 5V, but with the way that they are marked, it might be a 5A, AS or SA.

http://i4.photobucket.com/albums/y128/katiecat222/IMG_1873.jpg

The question, I have always accepted the Hardinge website as the bible. Till now, it has always served me well. But since the markings are a bit different, it wont help mutch.

I wonder if they are for a watchmakers lathe. Are they for a Deckel? Maybe a different type of mill?

So, what are these collets? Does anyone know what they are for?
A bit of advice would be greatly appreciated.

Thanks
rock-

TECHSHOP
08-22-2006, 09:12 PM
Sorry for the delay, got sidetraked on the "information superhighway" but here is some info:

http://home.att.net/~JEKasunich/vannorman/VN_Spindle.htm

http://home.earthlink.net/~rchaskell/metalworking/VanNorman/index.html

don't know if my "linky magic" is working today.

JCHannum
08-22-2006, 10:06 PM
The Van Norman 5V collet is the only collet I know of that uses a key. If it doesn't have the key, it's not a 5V. (That's kind of catchy.)

I would suggest getting the purchase price & shipping costs back, as the item was not properly described. The mistake may not have been intentional, but you should not have to pay for it.

rockrat
08-22-2006, 11:20 PM
The seller is very cool about a return. It could have been worse but its not.

I know the 5V fairly well. My Van Norman high speed milling head uses them. And I had bought these thinking that I could gind a slot in the for the key.

What I'm curious about now is the little collets. What are they? This would help the seller out a bit.

As for the 5V collets, I have thought about making the 2 that I need to give me some useable ones. One of these days....

rock-

TECHSHOP
08-22-2006, 11:20 PM
rockrat:

When I first read your post, I was thinking you had some Rivett collets, but the 4NS is "smalller" and a 5NS is "larger" than a 5V (as JCHannum stated neither has a key). I no longer have a Rivett lathe, so I can't measure what I don't have any more, but I think my little lathe used a 3NS. They were about 3" in length, my Rivett lathe was from the mid 1950's and came with collets, so I never hunted for more. I got lost in the web and linked up to some 5V info that you might already have found, sorry for the "bad lead".

JCHannum
08-22-2006, 11:31 PM
There is such a proliferation of collets, and manufacturers that it is very difficult to identify the less popular ones. To add to the confusion, many manufacturers used their own system to number collets.

There is a 2A that is similar in design and about the same body diameter, but shorter and different thread.

rockrat
08-23-2006, 06:32 PM
Thanks to you both. I will keep looking around for some info. Maybe the uk lathe site has infor for the Rivit lathe and collets.

rock-

rockrat
08-23-2006, 07:01 PM
More info just in case. The threads are not standard. They are a 15 tpi butress thread.

Tried http://shopswarf.orcon.net.nz/collet.html - with no luck.

rock-

Addition, might also be a faceting machine collet.

http://www.shorinternational.com/FacetQuadrants.htm

pcarpenter
08-24-2006, 11:44 AM
I don't want to hijack this thread, but it apparently does pay to know just what the designations mean.

I was all excited over a large set of mostly Hardinge collets that I was sure were 5c at a local surplus place. I looked more closely and they looked like a long 5c. They are 5NS. This doesn't make them bad, but I could have ended up with a lot of money sunk in something that will not fit the common 5c spindles in so many pieces of tooling today.

Paul

rockrat
08-24-2006, 07:01 PM
A fellow at Hardinge responded to my email and with some thinking on his part he came up with what he thinks is the correct collet. I checked the dims and they match.

20W Schaublin collet
Back bearing = .787
O A L = 2.719 (measured to the top of the head angle)
Threads = .775 x 6 threads / cm right hand buttress

rock-

IOWOLF
08-24-2006, 07:11 PM
While we are on the subject any body know of a "4 CB" collet this may be from a valve or Brake turning machine.
Let me know.

Doozer
08-26-2006, 02:50 PM
4ns or 5ns The ns stands for new style.
There are also 3os and 4os, etc. which stands for old style.
Of corse, the 5c Hardinge collet, the C stands for Cataract.
The 5v, the V stands for Van Norman.
--Doozer