Is it my turn? Anything to do with lathes, mills and other shop tools

Have a look again Fred... there's 4 of 'em.

Hi Jim,
the photos show that on each side of the shaft you replaced a full width roller race with two ball races.
So yeah, there's four of 'em.
A roller race is maybe four times as strong as a same-size ball race.
Each original full length roller bearing is WAY stronger than two propriatory roller bearings
which in turn are WAY stronger than the same-size ball bearings.
 
Hi Jim,
the photos show that on each side of the shaft you replaced a full width roller race with two ball races.
So yeah, there's four of 'em.
A roller race is maybe four times as strong as a same-size ball race.
Each original full length roller bearing is WAY stronger than two propriatory roller bearings
which in turn are WAY stronger than the same-size ball bearings.
Regardless Fred, each one of these bearings is rated at 1200lbs dynamic and 900lbs static loading. Running 4 of 'em on a lightly loaded, 1/3hp powered jackshaft borders on severe overkill. You don't recon the fact that they're cheap crap from China has any bearing (pun intended) on the 10min. failure of a single bearing?
 
Regardless Fred, each one of these bearings is rated at 1200lbs dynamic and 900lbs static loading. Running 4 of 'em on a lightly loaded, 1/3hp powered jackshaft borders on severe overkill. You don't recon the fact that they're cheap crap from China has any bearing (pun intended) on the 10min. failure of a single bearing?

Hi Jim,
some "bearing" for sure, in that even the worst quality of bearing should have lasted WAY longer than 10 minutes.
If your fix had lasted for (say) 10 days I'd have blamed the bargain basement bearings and tried again with good ones.
At a 10 minute lifespan I'd advise a second look at your install procedure.
 
Fred, have a good look at my first pic. The ball cage separated... most likely soon as I spun it, just took me 10 min to notice. The pins that hold the two cage halves together showed absolutely no signs of any sort of riveting or head upset whatsoever. I appreciate your input, but I'ma chalk this up to faulty manufacturing.
 
Fred, have a good look at my first pic. The ball cage separated... most likely soon as I spun it, just took me 10 min to notice. The pins that hold the two cage halves together showed absolutely no signs of any sort of riveting or head upset whatsoever. I appreciate your input, but I'ma chalk this up to faulty manufacturing.

Hi Jim,
we share aerospace experience, eh?
First rule, it's ALWAYS the inspector's fault.
 
Picked myself up a 20gal parts washer. Been needing one of these for a while.

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Dang Jim! You could branch out from your rotor biz with this. I have 2 carbs (BS34's) that could use this service.
 
Dang Jim! You could branch out from your rotor biz with this. I have 2 carbs (BS34's) that could use this service.
Well thanks. Never really thought of it that way. I'll have to mull that idea over. Send me a PM Rudy if you want your carbs done.
 
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