#11
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Right,
It has been changed to a rolling bearing at some time in its life. Its spins for two revolutions after a some lubrication. Can I get a company to make me a bearing that will support the weight of the shaft, the bearing in it is obviously not good enough. Any thoughts?
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Robbie |
#12
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Roller bearings
Big roller bearings can be expensive.
https://casterconnection.com/431620.html I have usually found them in industrial casters. Good luck.
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Bill Funk |
#13
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Wheel Maintenance (ball-and-race bearings)
This is a very old Wheel that we pulled apart to clean and lube because it sounded and felt as though rocks had been crushed with it.
P1010067c.jpg And since we had to make some 727 fusellage skins, we had no choice but to get the old girl going, again. P1010065c.jpg These are "ball and race" bearings. They are sold by bearing supply houses, and a good bearing house counter man can look up bearings in his books by Dimensions - outside dia, inside dia. and width .... IF you cannot get the bearing number off of the edge of one of the races. Sometimes there are quality levels of the same bearing /dimensions, so the load spec can be increased. We did not have to replace them - good thing because we were so remote - and after a good soaking and washing by the aircraft mechanics on staff, they were dried off and lubed thoroughly with a light bearing grease. The machine worked very well after the full maintenance. (Skins were made, fit and riveted, and then Boeing sent inspectors all the way from Seattle .... the old bird passed inspections with flying colors.) You can do this.
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. Last edited by crystallographic; 05-18-2020 at 01:34 PM. |
#14
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Kent. Why did you give that wheel so much work? Just go to Google and find the restart instructions. That would be right away.
But it's clear. Once every 50 years, the machine should be lubricated ...... or repaired and lubricated.
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Jaroslav |
#15
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Do you think I could get a new Babbitt Bearing made? Or buy a new rolling bearing that will support the weight?
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Robbie |
#16
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Quote:
Babbitt bearings (one type of "plane bearings") of large sizes are often-but not always- poured in place and then machined/scraped/semi'd/finished - align-bored in place when done to that point. You would have to get your needed measurements - width and outer diameter, and then locate a bearing maker and talk to them about making up what you need, and how to go about that for your machine. You may find a maker who can make up something close enough for you to install and then you'd have to jury-rig an I.D. align-boring bar in your machine and then hand turn the Inner Dia. Otherwise, get your dimensions and investigate ball-and-race bearing assemblies that would match both your hole and your shaft end. If all this is too technical for you then try to locate someone who uses a metal lathe to make parts with and ask them to help you .... ... you might make a new friend ... ... and get your machine going while learning a fundamental skill --> fitting new bearings into old machines. This is not hard - it's only a new lesson.
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. Last edited by crystallographic; 05-19-2020 at 02:09 PM. |
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