ICE

[The Boat House]

Took this out of a gear case yesterday.
Bearing felt good before I took it out.
No other damage. I suspect there was
just enough water in the bearing so
when it froze only the outer bearing
race was damaged. The gear case is
fine. As luck would have it I don’t
need the gear case but I could have
used the bearing.

[crosbyman]

odd I would have believed the aluminum gearcase would have split…. not solid steel in a gear 😯

Joining AOMCI has priviledges 🙂

[Buccaneer]

Mother Nature wins again!

Prepare to be boarded!

[joecb]

I doubt very much that that failure was due to water/ freezing. Looks like a heat treat crack at time of manufacture. Rather rare to see but can happen.

Joe B

[melugin]

Some of the teeth look bad/corroded. What did the rest of it look like? Wear or corrosion. Possibly an old collision.

[The Boat House]

Took another look. There is nothing I can see that
would indicate something went through it. Gear
teeth have some rust pitting but are intact. No
discoloration to indicate it got hot at any time.
The gear case had been drained but remaining
water droplets would indicate it was leaking.
The black lines on the gear case is where the
bearing is located in the gear case. I can’t detect
any bulging or cracks inside or out. If I hold the
race together in still spins well (Video). The
bearing felt really good when it was in the
gear case and was the reason I took it out to
use in a better looking gear case. If I had intended
to use that gear case I never would have known
it was broken. To have just enough water in just
the right place to brake the race and not do any
other damage would be unlikely yet it seems to
be the best explanation. I guess it shows you
should take the time to check everything rather
than assume something is still good.

https://www.youtube.com/watch?v=LI5ahmdupjc

[Mumbles]

That’s a tricky one to figure out as the race material is quite hard and brittle. So hard in fact, I put them in a press to shatter them so the balls inside can be salvaged.

I wonder if it didn’t get cracked or damaged by a previous owner hammering it on instead of pressing it on?

[Author]

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