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Thread: Replacing Spindle Bearings
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4th January 2016, 01:57 PM #46SENIOR MEMBER
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Always amuses me when people lump 1.35 billion people into one identity. They did this....they did that...
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4th January 2016 01:57 PM # ADSGoogle Adsense Advertisement
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5th January 2016, 11:17 AM #47
OK, In this instance I was referring to the Chinese government being actively complicit in an attempt to deceive the rest of the world into believing that these bearings are actually made in Germany.
It's a bit like American "World Championship Wrestling" that only has Americans in it. The words are meant to deceive.
In any case, do you really expect me to name the owners or founders of the business and then go to all the effort of maybe differentiating between this Mr Yu and that other 100,000 Mr Yu(s)?
No, it is far easier and just as accurate to say 'The Chinese". I am fairly certain that readers of this board have more than enough nouse to realize that not every Chinese person in the world is involved in this shorthand description.Bob Willson
The term 'grammar nazi' was invented to make people, who don't know their grammar, feel OK about being uneducated.
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8th January 2016, 10:45 PM #48Senior Member
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Reading the first page of replies here, about the expected lifespan of the bearings gave me a fright - 25 hours life!
Our router has a Perske 3hp spindle (aircooled). It was 19 years old when we bought it 7 or so years ago.
About 3 years ago the bearings were getting a bit noisy and the collet was getting hotter than I was happy with so we took the bearings out to get new ones.
Yes, I needed a chair to sit on - ceramic bearings - a big one at the bottom and a small one at the top - close to $240 & $100 for the pair.
At any rate, considering the age of the router, and the use we give it, I figured that was a fair investment - plus a cartridge of super high speed high temp grease.
It was a bit of a chore getting them off, and replacing them, but it's all done, and there's no apparent runout - not to my eyes.
I think we've put the machine through maybe 400 hours since then running at 2/3 fullspeed eg 12 000 rpm.
(The router gives me a message every 40 hours of runtime, that a 'service' is needed.
I think I've reset the message about 10 times since then.)
It's a retrofitted Esab, masquerading under Tekcel software...
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9th January 2016, 01:00 AM #49
I think there was a couple of words in Bob Wilson post about bearing lifespan that was overlooked by a few readers: "at DESIGN LOAD"
No engineer in their right mind would contemplate selecting bearings without a large load margin. If you look at the design load capacity of bearings, they are quite high, especially for little bearings. The life span goes up enormously when the bearings run well below design loads.Cheers,
Joe
9"thicknesser/planer, 12" bench saw, 2Hp Dusty, 5/8" Drill press, 10" Makita drop saw, 2Hp Makita outer, the usual power tools and carpentry hand tools...
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