What kind of centers?

[Chatham PenWorks]

I picked up an old Craftsman 109 yesterday, and these 2 centers were in the lot of tooling.

What are they?

 

[NittanyLion]

Is there a set screw on the side? If so,l I would say they are center bit holders. Otherwise, I'm stumped.

 

[Chatham PenWorks]

No set screws.

 

[KenV]

Some lace bobbin drives look a lot like those.

 

[Chatham PenWorks]

Some lace bobbin drives look a lot like those.

Have you seen any with the same "mouth"? All I can find have a square mouth like a socket.

 

[Curly]

The proper name escapes me at the moment but they are made with a soft end on the morse taper so you can machine them for your own tooling needs. For a special drill taper or thread to put an odd ball chuck on, or mount some other custom holder to.

 

[Chatham PenWorks]

The proper name escapes me at the moment but they are made with a soft end on the morse taper so you can machine them for your own tooling needs. For a special drill taper or thread to put an odd ball chuck on, or mount some other custom holder to.

Cool. I can see that. Thank you.

 

[KenV]

Lace bobbin drive -- The classic form was square but they were also used round -- largely because it was easier to get a round hole than a tapered square one.

I suggested that rather than the arbor blank mentioned by Pete (Curly). The arbor blank

https://littlemachineshop.com/products/product_view.php?ProductID=2394&category=

generally has a very shallow divot for a live center on the end, and the photo suggests a deeper hole.

 

[Chatham PenWorks]

So, one in the same. Love this place. Thanks guys!