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[4]

Another "What Is It?" Bridgeport Accessory?

January Project of the Month [3]
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Ironside

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#1
I got this in a mixed lot of Bridgeport stuff. It's about 16" long overall. The bore is pretty much the exact size as a Bridgeport J Head spindle. The mechanism attached to the bracket can slide and lock at any point in the slot. As you rotate the knurled part the shaft extends or retracts. I 100_3950.JPG 100_3951.JPG 100_3952.JPG 100_3953.JPG Thanks in advance for any input.
 

BROCKWOOD

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#2
I'd use it to zero in the head after angular usage. Looks like a fun thing to make for my mill!
 

cg285

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#4
i'd like to see that in action. looks like it would take 3 hands

trace piece looks similar to an automotive boring bar mic
 

benmychree

John York
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#5
All it took was downward pressure on the spindle, follow a line of cut, step over, repeat. On the one that I had, the center distance between the spindle housing and the follower was adjustable, I don't think it was more than about 10" or 12" long overall.
 

benmychree

John York
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#6
The trace piece would be the same radius as the ball end mill being used; on mine, the tracer was removable so different sizes could be used.
 

Silverbullet

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#7
It's the stylus for tracing on a mill or router tracer machine. It would have a special free float air or hydraulic table or head.
 

chips&more

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#8
Yes, I have I one those. Bridgeport called it a “Profiling Attachment”. They had two versions. Part #PM-1 was for the M head. And Part #PJ-1 was for the J head. And sorry or hopefully you have the spring attachment that goes with yours?
profiling.jpg
 
Last edited:

Ironside

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#9
Thanks, you guys are awesome. It makes sense now. You can see where it is able to accept different type profile tips. And nope, this is the only part that I have. I can look through the box of stuff that came with the lot, but I don't remember seeing a spring attachment.
 

benmychree

John York
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#10
Yes, I have I one those. Bridgeport called it a “Profiling Attachment”. They had two versions. Part #PM-1 was for the M head. And Part #PJ-1 was for the J head. And sorry or hopefully you have the spring attachment that goes with yours?
View attachment 261170
I remember now, that the spring part of the attachment was mounted on the bolts that the head swiveled on.
 
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