The Shop > Tools

Auto quill feed problem on my Bridgeport

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Darren:
Great stuff Bernd,

 know where to come now should I ever have the need !!!  :D

Bernd:
The machine is back together and working like it should. Darren helped without knowing it. He posted a link to a website for machine manuals. I took a look and found a whole set for the Bridgeport. They covered the 2J Variable speed head that this machine has. In an exploded view I saw that it's possible to separate the motor and variable drive from the spindle and quill feed by undoing just 3 bolts. But how to get the that up high enough to get at what I need to move inside. Well, why not let the machine do the heavy lifting.


I turned the whole head 180 degrees and brought up the knee till the whole works rested "gently" on the table with wooden blocks underneath. I unbolted the three bolts that hold the two parts together and I ……………


Lowered the table till the spline to the spindle came apart. Then I turned it back…..


90 degrees and I could get at taking out the drive shaft of the gears. Underneath that bracket is the bushing I needed to move up to get that gear that I showed in a previous pic up high enough to put the drive shaft with worm gear back in.


Here's the bracket and knob for engaging/disengaging the quill drill. Once I was able to move a few of the bushing around I got the drive shaft in and reassembled almost everything.


Here I'm assembling the two parts back together by "slowly" cranking up the knee. I brought up till there was enough threads on the bolts and then gently tighten the bolts and drew up the motor drive till everything was tight.


And here we are all buttoned up and ready to turn the motor back to it's upright position.

It's all back together and running. All I need to do is readjust the quill clutch. I left it quite loose in case I had a jam up or something. The best part was I had no left over parts. I usually have at least one or two parts left over from such an adventure. Also now that I have a better manual I can do a few more checks on the machine.

Now it's back to tramming in the head to make sure it's square to the table and it's time to get back to making tooling and steam engines and………………………

Regards,
Bernd

Brass_Machine:
I would have never thought about doing it that way. Very ingenious  :smart:

Eric

Bernd:
Well what can I say Eric. ::) Perhaps is from the years of working in a very large machine shop and watching when maintance repaired machines. Plus I had no way of going but down to get it apart.

I used to work for a gear machine manufacturer in Rochester, NY. see if you can come up with who that is. :wave:

Bernd

John Stevenson:
Bernd,

I can't for the life of me think how I got the shear pin in but it wasn't that way.
I know that as I have never stripped the head on a 2J before, I also have the manuals with exploded views but it doesn't make it clear there is another way.

Nonplussed in Nottingham..........

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