Photo Index - Bridgeport Machines Inc. - J-Head Bridgeport Mill

Machinery Photo Index

Manufactured/Badged by:
Bridgeport Machines Inc.
Bridgeport, CT

True Manufacturer:
Bridgeport Machines Inc., Bridgeport, CT

Machine Specifications
Machine Class:	Metal Working Machinery
Machine Type:	Mill, Vertical
Machine Size:	12x42, 1hp, Step Pulley, J Head with Tibon chromed ways
Submitted By:	Bernard Doyle

Machine Specifications
Description/Model:	J-Head Bridgeport Mill
Date of Manufacturer:	Approx 1970
Serial Number:	12BR 132,437 - Head J-135430
Last Updated	11/19/2022 11:42:26 PM

Comments:

This is a 1hp, Step Pulley, Series 1 mill with a 42in table and 12in knee (Y). Serial number on the J Head- J-135430 seems to put the machine in the circa 1970 bracket. The serial # for the body is 12BR 132,437. Head and body of the machine look to me to be each other. This is the only major machine I have purchased from a machine dealer.
The knee has Tibon hard chromed ways with much (but not all) of the original scraping still present.
Looks to be the original Servo 150 power feed in X direction.
The original table had a broken-out T-slot, which appeared to be from a badly torqued T-nut. The remainder of the rear T-slot was pulled up almost .075 in places! I found a clean used table, had it ground, scraped, and flaked on the ways, and Blanchard ground and flaked on the top and sides. It is beautiful and square, but until I turcite or replace the original gib, there’s not much adjustment left in my X gib.
I also replaced the Bijur pump with a rebuilt/refurbished unit. I have since added a really nice condition Cherrying Head (Ser # T1486). I added a vise lift attachment, collet racks, and will be adding a Newall DRO DP7.
One of my favorite additions is the DeePOL Quill travel indicator.

Photo 1:

Comments: Right after dropping in place.. still pretty out of order ha hah. The back of the Cherrying head on the left.
Source: me

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Photo 2:

Comments: Front of the J Head showing the DeePOL quill travel indicator and quill lock retainer.
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Photo 3:

Comments: A pic from before I had even mounted the case for the first time.
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Photo 4:

Comments: Replacement table after Blanchard grind and before flaking and truing.
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Photo 5:

Comments: Even if I wasn’t replacing the table, it would have still been SO important to remove the table and clean out the saddle and all the oil passages! SO glunked up with crap, and possibly grease! Ugh! This was a real mess when I opened it all up. The kne
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Photo 6:

Comments: The machine as found at the dealer. Shows the bad T-slot, and original vise which I sold and replaced with a Kurt.
Source: Me

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