Kennametals expanding mandrels

[yukon_rose]

I acquired a bunch of Kennametals expanding collets (all different sizes) similar to this one:


But I have no arbors for them.

I contacted Kennametals tech support and they told me the product is too old and no longer supported.

Inside the collets there is a taper but not a smooth one. There is a ridge just below the visible taper at the top of the collet.

So what does the arbor for these collets look like? And where can I buy one?

Gary

 

[C-Bag]

the product is too old and no longer supported.

Yup, so you should send them to me.

I think that would be a pretty simple project to make. I envision an arbor with shoulder the ID of the collet with a threaded bolt hole and a tapered washer matching the taper on the end of the collet.

 

[yukon_rose]

Your shop made mandrel is a thought. Except the shape of the collet is thus:

Where ^ is the outside edge.

Gary

 

[C-Bag]

So the top of your drawing is the inside, and the left is the top of the collet?

 

[yukon_rose]

The top is definitely the inside. But I can only assume the left is the front - since I've never seen an actual mandrel.

Gary

 

[C-Bag]

I thought you were drawing one side of the collet

 

[yukon_rose]

I thought you were drawing one side of the collet

Here is a more complete drawing:


Gary

 

[Winegrower]

I have a set of expanding mandrels, that are much longer than what you are calling your collet. The "arbor" part looks just like a tapered cone at the same basic taper as the inside of the expanding part. Should be straightforward to make a part like that.

There must be better names than collet and arbor for these parts...anybody?

 

[yukon_rose]

I have a set of expanding mandrels, that are much longer than what you are calling your collet.

I'll bet they were made by KO Lee.

Gary

 

[Winegrower]

I'll bet they were made by KO Lee.

I don't know. More likely Ho Lee Moses.