Bridgeport reverse trip ball lever

This topic has 9 replies, 4 voices, and was last updated 2 January 2025 at 14:21 by Fulmen.

Viewing 10 posts - 1 through 10 (of 10 total)

Author

Posts
31 December 2024 at 23:36 #773700
Fulmen
Participant
@fulmen
So mine broke, seems like a common occurrence. It was also a total nightmare to get out, another common occurrence. So I don’t have a whole part to copy, does anyone have a full drawing?
Advert

1 January 2025 at 07:07 #773705
DC31k
Participant
@dc31k
There is extensive Bridgeport documentation, which would include exploded drawings, at vintagemachinery.org

There is a Bridgeport sub-forum at practicalmachinist.com

Bridgeport is the name of a machine tool builder. Is the part you seek common to every machine they have ever built? If not, some indication of a model number would be useful.
1 January 2025 at 08:39 #773711
David George 1
Participant
@davidgeorge1
Which Model mill do you have. A serial number would help. When I was an apprentice I used to machine these for Bridgeport Leicester in batches of about a hundred. The ones I machined would be fairly simple to remove as they just sat on the top of a hexagonal shaft clamped by a grub screw and a clevis pin through to connect it to the setting bar.

David
1 January 2025 at 11:23 #773744
Fulmen
Participant
@fulmen
It’s the classic knee mill with the 2J head. If you had one and broken it you would know 🙂

Here’s what it looks like: https://atrumpparts.com/image/cache/data/MIll/CNC%20Bed%20Mill/E5FC/HEAD%20STOCK%20INFRASTRUCTURE%20(3)%20ASSEMBLY/10-05-67%20(2)-1000×1000.JPG

All that’s left of mine are the two balls, I’m sure I can figure out the rest but a complete drawing would simplify matters. I also need to figure out what material to use. I think I will go for a softer material than the original, perhaps a 8.8 or 10.8 bolt.
1 January 2025 at 15:17 #773839
Nick Hughes
Participant
@nickhughes97026
Don’t know the quality, but at this price for 5 off, it’s worth a gamble:-

https://www.aliexpress.com/item/1005003694320738.html
1 January 2025 at 15:54 #773841
Fulmen
Participant
@fulmen
It’s not really a cost issue, I’m in the middle of a job and would like it fixed pronto. Besides I’m a cheapskate 🙂
1 January 2025 at 18:05 #773856
DC31k
Participant
@dc31k
1 January 2025 at 18:20 #773860
Fulmen
Participant
@fulmen
Well it’s quicker and easier for ME 🙂

Honestly it’s simple to do if it’s not broken. You need to remove one slotted screw and pull it out with a 4-40 bolt. But I was just hoping somebody had made such a repair in the past and kept the drawings.

No biggie, I always figure it out in the end. Except when I don’t…
1 January 2025 at 20:17 #773889
Fulmen
Participant
@fulmen
This should do the trick:
2 January 2025 at 14:21 #773992
Fulmen
Participant
@fulmen
After some measurements I increased the diameter to 6.3mm, the bore seems to be 1/4″. And it works again, except for the fact that the feed is broken so I really could have solved it with a straight pin.
Author

Posts