...Anyone ever pinned a sloppy crank bearing?

[alexcagle]

Anybody on here already tried this?
The bearing pocket was loose enough to pull the bearing out by hand, but the bearing pocket not out of round.
It was caused by somebody running a saw with loose crank bearings too long.

I've used this stuff in the past for loose ones and had mixed results, but I think the ones that fail were because of a mildly bent crankshaft.

 

[Big_Wood]

are those just roll pins? how are they keyed to the outer race? are you gonna stuff the pins with JB stick weld? you hack, pretty professional looking hack job though lol. if it was keyed good and sealed it would be a for sure fix but the 660 would have held that without the pins i bet, prefer 620 myself. obviously a new case half is the correct fix but sometimes you gotta do what you gotta do.

 

[TonyM]

Loctite 620. Used it on motorcycle bearings and loose splines on JD 720 diesel flywheel. Doesn't come loose without lots of heat (oxy-acetelyne)

 

[alexcagle]

are those just roll pins? how are they keyed to the outer race? are you gonna stuff the pins with JB stick weld? you hack, pretty professional looking hack job though lol. if it was keyed good and sealed it would be a for sure fix but the 660 would have held that without the pins i bet, prefer 620 myself. obviously a new case half is the correct fix but sometimes you gotta do what you gotta do.

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HACK?.....lol you mean self taught redneck engineer?
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Hack jobs require bailing wire and lag bolts.
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The holes aren't drilled all the way through. Do you think tapping the hole and installing a countersunk plug would be a better idea.
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That's really just a mock up.
I have about 10 case halves in similar shape.
I just can't help thinking there is a work- around to save them.
The models with 6202 bearings with a 36mm OD can be machined, (oversized), to use the TS420 bearing, which has a slightly larger 36.3mm O.D.
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In the car and truck world, they make a harmonic dampener repair sleeve out of thin metal to overcome the issues of a front engine seal seal leak from high mileage wear. It just taps over the snout tight and has loctite to keep it in place. Anyway, my point is that it would be nice to have a metal sleeve that could be used to take up the slack of a loose bearing.

 

[pioneerguy600]

On 3 different saws I did pinning and sealing the bearing in with Devcon aluminum has worked well. I did grind a slight groove at each pin into the outer race for the shoulder of each pin to expand out into, figured it would prevent the bearing from spinning, the devcon filled all the gaps and the saw would hold vac. Two 046`s are still running, the 064 got crushed by a excavator operator clearing brush away, the saw could not stand up to the steel bucket of a 20 ton Volvo 240, who would have thought!