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Old 04-02-2010, 10:22 AM
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sandrailmike sandrailmike is offline
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Default Bridgeport repairs

Hey guys I have a question. I picked up a Bridgeport from a High school that scrapped their machine shop program. It sat out in the equipment yard for about a year. It is not in bad shape a little rusty but hey it was free!!!
It is a step pulley type and the problem I am having with it is I can't get it to switch to low range. The lever on the top of the machine seems to be frozen. Does anyone out there have a book or some experience repairing on one of these so I can try and figure out what is stuck before I just start taking it apart?
I have been using it and it works well so far I would like to get in to low range when I need to.
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Old 04-02-2010, 11:02 AM
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Possibly related: http://www.practicalmachinist.com/vb...k-gear-187325/

Don't know if this manual is right or relevant:

http://www.kneemills.com/index.asp?html=Documentation
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  #3  
Old 04-02-2010, 11:12 AM
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Attached are Page 34 and 35 that are the parts breakdown and descriptions for the step pulley (J-Head) mills.

The third file is the shifting instructions.

The fourth file is the complete manual for the older (M, J, 2J, and E head) mills.

Hope these help.
Attached Files
File Type: pdf Page34_bpmanual.pdf (51.9 KB, 170 views)
File Type: pdf Pages35_bpmanual.pdf (38.7 KB, 181 views)
File Type: pdf Jhead_shifting.pdf (73.1 KB, 155 views)
File Type: pdf bridgeport-manual.pdf (8.25 MB, 179 views)

Last edited by TriHonu; 04-02-2010 at 02:56 PM.
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Old 04-02-2010, 11:41 AM
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Quote:
Originally Posted by sandrailmike View Post
It is not in bad shape a little rusty but hey it was free!!!
............................. a free Bridgeport. Free!

a Bridgeport - free.

Boy, what I wouldn't give to get a free Bridgeport!

Mike, you really oughta post some pictures of it & see what happens.
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Old 04-02-2010, 03:45 PM
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Mike,

A, free Bridgeport? Pictures are in order.

As to your low range issue, since it sat out in the weather I would take some penetrating oil and put it on the sleeve where the knob is on top of the machine. There are 2 pins in a slot on each side that shift the top part of the shaft up and down. i bet it is just rusted up.

Item 31 on page 34 in the above post.

Scott
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  #6  
Old 04-02-2010, 03:51 PM
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Thanks guys I have started the penetrating oil hopping it's going to work. The mill is set up at a friends shop. I will post some pictures soon. My dad has been fighting leukemia for nine months and he is due home soon. I have been spending all my extra time taking care of his ranch but when he gets back I will have some help from others and I will get some pictures up asap.
Tri thanks for the manuals!
On another note anyone know why my profile picture dosent show up.

Last edited by sandrailmike; 04-02-2010 at 04:22 PM.
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  #7  
Old 04-02-2010, 04:59 PM
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Mike to get an avatar here you need to private message madamX. I don't know how to link that for you.

Hope your Dad gets better.

Wow a free bridgeport. I think you got a good start with the penetrating oil to loosen it up.

We do love pictures though.
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Old 05-25-2013, 08:31 PM
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I know I have owed this thread pics for like an eternity so here they are. I am finally setting my machine up in my shop. Thanks to those of you who provided info I will be setting out to get it going next week. I had it running to test the motor and what not the motor seems great but I have no three phase so I am in process of getting another motor would anyone be interested in this one? I will make someone a super deal.
Thanks

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Old 05-25-2013, 09:17 PM
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Mike,

Might I suggest you keep your 3 phase motor and consider that you will encounter more three phase equipment at a deal too good to turn down. You can have 3 phase with a little leg work and such.

Just a thought.

And, free tool, lots of people want one, it works as you stated you had been using it. Pictures ( albeit in a non working order in those pictures. ) I'll vote you a pass on this and extend my vote for a you suck.

Scott
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Old 05-25-2013, 09:27 PM
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+1,
Mike, I just converted my mill to 3 phase so I can have variable speed. All I would do is spend 150 bucks for a VFD and hook it up.

And you sure do SUCK
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