Identify this tool set

[Chawbeef]

I just inherited a few things from an estate and wondering what I have here??? .............................Chawbeef

 

[Susquatch]

A pair of Machine Jack's.

 

[Chawbeef]

A pair of Machine Jack's.

Thankyou sir. Do you know why they have a ball machined on the end??

 

[Dan Dubeau]

The spherical point is either to provide a smooth single point of contact, or there are/were flat faced contact feet with a matching ball socket in them. Either way, I'm pretty sure those are shop made, and are handy to have around. If you don't find any flat feet for them, it should be a simple operation to make some by plunging a suitably size ball end mill to form the socket.

 

[Susquatch]

^ What Dan says.

Here is one of mine. I have 4. If you look closely, you can see that the flat top has a ball socket under it. Yours is just missing the caps. It allows the jack to distribute the load better as one jack lifts more than the other(s) or to accommodate a non-level surface. Your kit includes other tips like the one on the right in mine.

Easy to make replacements.

 

[TorontoBuilder]

A pair of Machine Jack's.

a nice matched set, with extra posts and what looks like a beech block to store the accessories in. Sweet.

which reminds me that I forgot that a few pair of machinist jacks has been on my todo list for several years... I like the design by Marc L'Ecuyer aka thatlazymachinist...

 

[Susquatch]

Also, on the left of my box are various feet too. These can stack and have a recess to ensure a good fit.