Need BOSS knee parts

[jmelson]

Does anyone know where a Series-I BOSS machine is going to get scrapped? I need all the fittings for the knee that mount the leadscrews. I have an old round-ram 1938-vintage base with the short knee with the 9" travel. I got a BOSS knee and saddle that had been stripped for the scrapyard, and want to put that on my existing machine base. I have verified that the dovetails will actually FIT!
What I want to do here is use the BOSS knee and saddle, but reuse my original table to get a little more X travel than the BOSS. I can get about 31" of X travel now, but only 7" Y travel do to my faulty retrofit.

So, anyway, I need those boxes that hold the ballscrew bearings and belts, and the motors mount to them. I managed to snag a brand-new Y axis ballscrew, but never got hold of an X ballscrew, but then the BOSS screw is probably going to be too short, anyway.

So, what I'm looking for is the following :
BOSS Y axis ballscrew bearing mount and belt housing, and the timing pulleys
BOSS X axis ballscrew bearing mount and belt housing, and timing pulleys
BOSS yoke (the thing in the saddle that the Y ballnut pushes back and forth)
Maybe a BOSS X axis ballscrew if it has enough travel
Any additional pieces that make it all go together.

This is all for a Series-I machine. I have never pulled a BOSS table apart in detail, and I have these totally stripped castings, so I am a little vague about how the missing parts differ from the way a manual Bridgeport knee works.

Thanks in advance for any pointers!

Jon

[machintek]

A series 1 BOSS machine such as 3, 4, 5, 6, 8, 9, with true CNC iron will have 18 by 12 in travel.
Series 2 were Box way.

George

[mactec54]

Hi jmelson

I have some Boss parts for a knee do you need the jack bevel gear etc for winding the knee up & down have some timing pulleys for the drives which are 1 to 1 new parts
send a pm

[jmelson]

A series 1 BOSS machine such as 3, 4, 5, 6, 8, 9, with true CNC iron will have 18 by 12 in travel.
Series 2 were Box way.

George

Right, this is a Series I manual machine that I have converted to CNC. The very old Bridgeports (1938 - 1942 at least) had only 9" of Y travel. I want to increase my Y travel by replacing the knee (which I have the stripped casting of both knee and saddle). I want the pieces that are needed to mount the ballscrews and nuts for the X and Y axes. I have a 9 x 31" table that I want to use to get just a little more X travel than the BOSS setup. That will almost certainly require a longer ballscrew.

I have already scraped the saddle (really a fine hand grinding operation due to the chrome).
I still need to scrape the knee just a little, and then the old table needs serious scraping due to wear in the middle.

Jon

[jmelson]

Hi jmelson

I have some Boss parts for a knee do you need the jack bevel gear etc for winding the knee up & down have some timing pulleys for the drives which are 1 to 1 new parts
send a pm

Thanks, but the jack, knee screw and all that hardware looks in good shape. The shaft you actually drive with the handle has to be longer, so I do need that part, and hadn't even thought about that one! I will probably keep the knee manual as it is now.

Thanks,

Jon