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Author Topic: Bridgeport Quill Feed Mechanism  (Read 24769 times)

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Re: Bridgeport Quill Feed Mechanism
« Reply #50 on: September 17, 2008, 12:49:14 PM »
Steve,
If there is room enough, put a small slug of Delrin or other hard plastic under the screw. It will lock the threads without damaging them.
RC
Re: Bridgeport Quill Feed Mechanism
« Reply #51 on: September 17, 2008, 12:57:21 PM »

Quote
All of our work is 2.5 axis stuff. I would not want this system if I were doing 3 axis jobs. I just don't think the single 1/4-28 "bread and butter" bolt would survive through the long haul of repetitive up/down motion.


The bolt in mine that holds the ball nut mount in place on the quill is 3/8x24 tpi cap head allen screw , Mine has run aprox 30 hours a week for over 4 years with no problem
« Last Edit: September 17, 2008, 01:00:53 PM by panaceabeachbum »
Re: Bridgeport Quill Feed Mechanism
« Reply #52 on: September 17, 2008, 01:11:44 PM »
RT,
Was it originally 3/8....or did you open it up ?
Thanks,
RC

Offline Hood

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Re: Bridgeport Quill Feed Mechanism
« Reply #53 on: September 17, 2008, 01:38:01 PM »
Think the Bridgeports are 3/8, will see if its in the manual but its definitely bigger than 1/4.
Hood

Offline Hood

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Re: Bridgeport Quill Feed Mechanism
« Reply #54 on: September 17, 2008, 01:40:40 PM »
yep just looked its 3/8 UNF 5/8 long on the original.
Hood

Offline Sam

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Re: Bridgeport Quill Feed Mechanism
« Reply #55 on: September 17, 2008, 02:38:23 PM »
3/8 would definitely be better than 1/4. We were gonna tap ours out bigger the next time we changed out the spindle bearings. We have never had any major issues with it, but it has loosened itself on occasion. I would recommend people at least being conscious of it. It's good that others haven't had the same problem.
"CONFIDENCE: it's the feeling you experience before you fully understand the situation."
Re: Bridgeport Quill Feed Mechanism
« Reply #56 on: September 17, 2008, 06:44:06 PM »
Yes mine was originaly 3/8x24 (NF) also

Offline Chaoticone

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Re: Bridgeport Quill Feed Mechanism
« Reply #57 on: September 17, 2008, 07:20:16 PM »
Well Sam, I have had mine back out as well. Think maybe its because the spindle originally would run 5800 in higest gear. You know how it is, once I got the VFD wired, well hey!  ;D

Brett
;D If you could see the things I have in my head, you would be laughing too. ;D

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Offline bowber

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Re: Bridgeport Quill Feed Mechanism
« Reply #58 on: September 18, 2008, 05:00:21 AM »
Good point RC, I always try to think of the most complicated way to do something ;)
Having taken the cover off the head again I noticed the lug for the depth stop has been machined off so I'll have to make a jig and drill and tap the head in a few places, luckly it's quite easy to remove the quill because the rack and pinion feed is not there and it's all machined on the front.

Steve

Offline Katoh

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Re: Bridgeport Quill Feed Mechanism
« Reply #59 on: September 03, 2015, 07:28:33 PM »
G'Day Friends
Sorry to bring up such an old thread, but I’m just up to the point of making something for the quill now.
I like what hood has done on the 3rd page looks very neat and tidy. I was wondering if anyone had detailed drawings of theirs that they wouldn't mind sharing?

Thanks
Katoh
Cheers
Katoh