Bridgeport x-feed - dog clutch?

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MRA

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Hi folks

The Bridgeport vertical mill I get to do some of my foreigners on has a problem with the RH longitudinal feed handle. One gives it a small twist to make it engage - sometimes it does, mostly it doesn't, and if the gib is at all tight it definitely doesn't. The one at the LH end of the table is fine, but I'm wary of getting my left arm lengthened - a cosmetic enhancement not covered on the NHS I think, and anyway it might enable me to reach my wallet in my LH pocket.

It feels like a worn dog clutch. If anyone can point me to the right exploded diagram or give me some idea of the way in (or just as important, *not* the way in) I would appreciate it. Even what most people call this assembly would be helpful, as I am not getting very far with google.

Thanks
Mark
 
Does your unit have power X feed? If not, then you might have a missing/broken Woodruff key. Just pull the handle off and check.

Ted
 
Forgot to add. I'm not familiar with all the different types of power feeds, but if you don't have one, there is no clutch. It direct. The handle is directly connected with a Woodruff key to the X screw.

Ted
 
Thanks Ted. This unit has a DC motor providing power x-feed, with a simple pot to adjust the speed. There's a lever on top which one swings left or right to choose traverse direction, which also connects to a rod along the front of the table which can be tripped by cams to go left and right automatically. This lever has to be placed centrally in order to allow manual x-feed - upon which one gives the handle a slight twist which is meant to engage manual feed, and sometimes does!
 
Sorry then, I'm not much help because I'm not familiar with that setup. I guess unless someone is and can offer a suggestion you'll have to open it up and investigate.

Good luck,
Ted
 
Well, the thing ended up being a shagged one of these

https://www.bridgeportuk.com/8006215-handle-bush-f-6215-667-p.asp

This lets the handle stay put when power feed is on, rather than spinning and hitting someone in the balls, but engages when you twist the handle whereupon a pin protrudes into one of those 4 holes. Well, that's what happens until you wear the edges of the holes away.

Boss decided to buy one after I wasted an hour or two trying to fix the old one, unsuccessfully!
 

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