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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Stuck bridgeport knee
Hey folks I picked up an old bridgeport the other day for a good price
because the knee is stuck. I took the table off and did a little looking around, it turns out the the knee nut had twisted off the pedestal causing the knee crank to free spin. The previous owner try so hard to crank the knee after it had stuck they broke off the very top portion of the pedestal, that's not my major concern at this point. My big problem is breaking free the knee. The knee gib adjusting screw is missing and it looks like the top portion of the gibe is missing so I can't adjust the gib. I've tried to jack up the knee to loosing it and I've tried downward pressure as well. I've got liquid wrench on all the parts and ways hoping it will soak in and loosing up the components. If anyone has any suggestions I'd be grateful for the help. Thanks -- Jack Fisher |
#2
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Stuck bridgeport knee
Agree with Polymer man..... the gib is holding it. ............On 7 May 2006 13:15:05 -0700, "Polymer Man" wrote: wrote: Hey folks I picked up an old bridgeport the other day for a good price because the knee is stuck. snip I'll bet the answer to your problem will be loosening the gib and getting it out. There may be two gib adjusting screws, one on the big side, and one on the small side. If so, take the one on the big side out, put it into the small side, and push it out. If there are no screws on either side you need to use a hammer and a drift punch an knock the gib out from the small side. ============================================== Put some color in your cheeks...garden naked! "The original frugal ponder.."Since my statements are given freely, take em or leave em, I am entitled to my opinion none the less. My opinion and $1 is still only worth $1..... ~~~~ }((((o ~~~~~~ }{{{{o ~~~~~~~ }(((((o |
#3
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Stuck bridgeport knee
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#4
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Stuck bridgeport knee
Polymer Man wrote:
wrote: Hey folks I picked up an old bridgeport the other day for a good price because the knee is stuck. snip I'll bet the answer to your problem will be loosening the gib and getting it out. There may be two gib adjusting screws, one on the big side, and one on the small side. If so, take the one on the big side out, put it into the small side, and push it out. If there are no screws on either side you need to use a hammer and a drift punch an knock the gib out from the small side. I agree that no matter what the problem, loosening the gib is a first step. But, most Bridgeport knee gibs have screws 'keyed' to the gib. So, the gib has a groove, and a groove and ring at the end of the screws engage the "hook" at the ends of the gib. So, you can't get either screw to come out by itself. You have to get the screws loose, and then work them out together with the gib. If the gib is truly frozen, then you risk breaking off the screw that you are trying to pull with. The gib has to come UP to loosen. Jon |
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