Index mill, possibly a 40

[pontiac428]

Wow, original invoice!

Wrap your mind around this:

$1257 in Jun 1946 has the same buying power as $19,950.47 in Dec 2022.

That's capital equipment!

 

[7milesup]

I think that 1257 is the gross pounds.

 

[pontiac428]

I think that 1257 is the gross pounds.

And that's why ISO 9001 requires callouts on documents have the units identified!

 

[tk1971]

Boring out that stuck tool from the spindle is slow going.

The telescopic taper attachment was easy enough to use.

Lots of deflection with a smaller diameter boring bar over 4 inches, so I shortened distance to 3” to get as much as I can out from the larger diameter end. Once the material was thin enough, I used an awl to bend it inwards, collapsing it and breaking it free from the spindle.

Pics:

 

[davidpbest]

What a fun project. Keep posting please.

 

[mattthemuppet2]

crikey! Personally I'd buy a big azz forge and melt that remnant of a collet down to make sure it is unable to cause anymore anguish ever again.

 

[tk1971]

Free at last. Bored that last inch out right up to the threads.

Screwed in the drawbar and tried to “tap” it out with a hammer. No dice. Back on the press. At first, nothing… then after a few minutes with constant pressure still applied: “Crack !!!!!!!!!! All the pieces fell down to the cushion I had placed below. I thought either the drawbar or something else had broken. It finally broke free.

I was expecting lots of rust to explain why it was stuck but nope, just some previous owner cranking down on the drawbar.

Pics:

 

[tk1971]

Getting ready to reassemble the spindle with new bearings.

For the bottom two angular contact bearings, I plan to put them in the back to back (DB) configuration.

Just wondering if it should be something different (face to face, or tandem).

 

[mattthemuppet2]

holy cow. I guess they ain't kidding when they say BS and MT are self-locking tapers!

 

[Charles scozzari]

Getting ready to reassemble the spindle with new bearings.

For the bottom two angular contact bearings, I plan to put them in the back to back (DB) configuration.

Just wondering if it should be something different (face to face, or tandem).

I would place the bearings face to face as in a thrust situation. They still work as radials.