Round Ram Mill

Cdugiedugan · Dec 10, 2019

So recently I acquired a mill from an old aeromotive supply company in mu home town. I was able to get it for a great deal but after getting it back to my shop and looking it over in more detail, I noticed that the body of the machine has no casting or identification marks. The machine has a Bridgeport J head mounted on an unknown body.

The body looks somewhat similar to the old round ram Bridgeport but its obviously different. It does have a serial number on the top of the knee (53026B)

I was wondering if any one has seen a body like this before. I've done extensive searching on google trying to find a picture or something close to this but it always points back to a round ram Bridgeport.

MilGunsmith · Dec 10, 2019

Looks like the Bridgeport M head mill that I had. It.may have had the head changed

JohnEvans · Dec 10, 2019

The way the turret attaches to the main body is not the way BP did it. BP's had 4 pockets with nuts retaining the turret. This thing has 2 horizontal nuts to the rear to lock the swiveling of the turret.

alum100k · Dec 10, 2019

JohnEvans said:
The way the turret attaches to the main body is not the way BP did it. BP's had 4 pockets with nuts retaining the turret. This thing has 2 horizontal nuts to the rear to lock the swiveling of the turret.

It looks Cincinnati to me. The earlier series before the Toolmaster, could have a different turret, ram and head. They used a "B" preceding the number. So if it is a Cincinnati, the 1st two numbers tell the date. The numbers 53026 mean it was made in 1953 or 1926. I'm going with 1953 because the Bridgeport didn't have a dovetailed ram until mid 1956. They made the "J" heads before that. And dang, my old "J" head does seem to date earlier than 1956.

Cdugiedugan · Dec 11, 2019

MilGunsmith said:
Looks like the Bridgeport M head mill that I had. It.may have had the head changed

Yeah this has a J head on it but I have been unsuccessful with finding anything out about the body. Its strange. The J head mounts up without an adapter from the looks of it, the y axis lead screw is offset to the right of the machine (not centered) and the knee handle shaft is 7/8" versus 5/8" like the typical Bridgeport

Cdugiedugan · Dec 11, 2019

alum100k said:
It looks Cincinnati to me. The earlier series before the Toolmaster, could have a different turret, ram and head. They used a "B" preceding the number. So if it is a Cincinnati, the 1st two numbers tell the date. The numbers 53026 mean it was made in 1953 or 1926. I'm going with 1953 because the Bridgeport didn't have a dovetailed ram until mid 1956. They made the "J" heads before that. And dang, my old "J" head does seem to date earlier than 1956.

I have a call into one of my contacts at Milacron (the people that absorbed Cincinnati milling machines), now its just a waiting game to see what they say

Ohio Mike · Dec 11, 2019

Definitely not a Bridgeport. Does have a Cincinnati look about it. Could be European?

Jim Christie · Dec 11, 2019

I also wondered if it might be a British or European Mill that started out with a different head and perhaps they made a deal with Bridgeport to buy the heads or someone adapted it later on .
I tried a couple of searches and also found this one with a round ram so there may be others.
Sunderland Gear Planers
British Standard Whitworth threads somewhere on the machine might be a clue as would metric threads and dimensions on parts other than the head.
Jim

Benta · Dec 13, 2019

The clean, functional design of the column says Italian or French to me. Not Rambaudi, theirs were heavier. I'd say Italian.

jhruska · Dec 14, 2019

Bridgeport Turret Mill with round ram.

John

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