2 Jaw chucks

[matthewsx]

I see them advertised but don't really know what they're used for, please educate me.

Is it just for square/rectangular material? What are they really good for such that the major manufacturers all seem to offer them.

John

 

[benmychree]

Two jaw chucks are or were commonly used for handling oddly shaped items such as castings in machines such as turret lathes; I have one that has jaws with a dovetail indent, I read that they were used by making sub jaws to fit the part being machined, sometimes by simply casting babbit metal around the part and fitting the dovetails.

 

[benmychree]

Personally, I have never seen modern advertisements for them.

 

[matthewsx]

Thanks for the insight, mostly I see them on eBay but they are still manufactured. MSC has quite a selection of them.

https://www.mscdirect.com/product/details/36306793

John

 

[Jimsehr]

Thanks for the insight, mostly I see them on eBay but they are still manufactured. MSC has quite a selection of them.

https://www.mscdirect.com/product/details/36306793

John

Here is one mounted on my 11 inch Logan.
The jaws were milled on mill and a pin used against end of part for location.