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Bridgeport jammed ram

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Meldonmech:
Hi Mick,
                 Nice bit of kit youve aquired, looks well balanced on the mill. Is it going to have the matching green livery?

                                                     Cheers  David

awemawson:
All sounds rather familiar - when I fitted the slotting head to my Bridgeport at my last house I ended up cutting gaps in the shelving so it would rotate to the front. I still had to extend the ram as far as it would go, swing it round, then push the ram back. Not too much hassle as it wasn't used very often.

micktoon:
  Cheers for the comments lads, David it will be getting the traditional green paintwork to match once its all working and tested  ( I have learnt the hard way that painting things before testing leads to it not working then needing re painted  :palm: )

 Cheers Mick.

micktoon:
Well its an age since this problem was shelved due to other things getting done but I have finally solved the problem!.
  I could not get the ram to shift with the sash clamps in the corner , I tried various anti seize releasing type oils etc but none worked  so I had to eventually move the mill so I could get around it and also use a chain hoist to take the weight of the ram and milling and slotting head when I tried to get it free. Needless to say this was a right job in its self as I had it on a steel frame rawl bolted to the floor then concreted in etc.
  Anyway once it was in place it was easier to keep winding the sash clamps back and forth even though they were keep trying to slip off and needed re setting every 3 inches etc, it was still seized tight so the clamps only just managed to slowly shift it back and forward.

This was the set up under the lifting hook and with the weight supported and the sash clamps on each side of the ram.





As you can see from this photo even with the ram fully forward then fully back it left a six inch section that never stuck out to be oiled, this must have been the stuck area as the sections that did stick out were spottless and oiled, as you can see in the second photo.





I had the rack and pinion removed and just kept jacking right forward then right back and oiled each time, still nothing improving, I then decided to lift the whole machine on the lifting eye so it was hanging off the ram in effect and the sash clamps were easier to operate, once it was fully at the back of the ram the machine tilted backwards so it was resting on the back corners , I then put light oil at the front of the dovetail and went for my tea hoping it would seep backwards with gravity.................... I replaced the pinion and it moved it an inch or so , so kept working and oiling it and all of a sudden its totally free and able to be moved via the proper lever with one hand easy.

 So just a case of the oil dried out ? , it did used to work and once the oile had got under the dovetail again it was sorted. All I can say is if you have a bridgeport or similar mill is operate the ram back and forth every so often as this was a right hassle to get freed off.

 After I was thinking I could have drilled the section of the ram that was sticking out from the side then up over and fitted an oil nipple then jacked the new nipples over the machine side of the dovetail and pumped oild between the two surfaces and this would have done the job I think as the problem seems to have been the weight of the ram is wiping the oil off as it goes back into the housing.
  Anyway Job done................ I just have to re paint half the mill now lol.
  Cheers Mick.

vtsteam:
Wow, that was a job!

Mick, you're getting to be an expert at unsticking machinery.   :bow:

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