How do you repack crank bearings with grease without taking everything apart?
- Thread starter derekc
- Start date
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chowdozer
Addicted to ArboristSite
What's the white stuff on the bottom and the top? It looks unnecessary.
GASoline71
Mr. Nice Guy
Ax-man
Addicted to ArboristSite
WOW!!!! I don't believe what I am reading. :jawdrop:
Larry
Larry
GASoline71
Mr. Nice Guy
That makes... well... all of us too Larry... 
Gary
Gary
Saw Dr.
Junk Collector
Me either. Tried to pop your first nova, but It didn't happen.
outdoorlivin247
Addicted to ArboristSite
Bump,
Pioneerguy600
Pioneerguy600
There's a number of electric motor bearing applications using sealed bearings that are packed with grease that turn up to 24k rpm continuously. I would think if the grease caused the balls to skid then engineers would have come up with an alternative to grease.
The big problem with grease in the main bearings of a chainsaw is the accumulation of dirt, debris, and sawdust. This leads to premature failure of the bearing.
The big problem with grease in the main bearings of a chainsaw is the accumulation of dirt, debris, and sawdust. This leads to premature failure of the bearing.
Saw Dr.
Junk Collector
I don't doubt that. However, if you take a bearing that is designed to run in lightweight oil, and pack it completely full of axle grease, I suspect there will be problems. Honestly, I have never tried it. Supposedly, the balls will try to ride up on the grease if it is too thick, or there is too much volume. Kinda like a tire hydroplanes. Read about the skid thing once in a bearing book. Who knows. I am no engineer.
My answer was no less intelligent than the original post. I should spend more time in the shop, and less time reading.
RRSsawshop
ArboristSite Operative
:agree2: Same here scary how many people don't know HOW a 2 stroke motor works !!!!!
Funny now after reading all these posts I'M HUNGRY :hmm3grin2orange:
I was just pointing out that it depends on the application. Greasing a modern chainsaw main bearing will drastically shorten the life of it, no matter how it's approached (and for various reasons.)
In the old days though, when saws were much slower and the operators much more gorilla-like, the shop manual said to grease all bearings during re-assembly of the saw. This was actually quite important since many of the earliest saws used bushing bearings at some point in the reciprocating assembly.
Are these the type of bearings that are used in the crankcase.
parrisw
Tree Freak
I'm thinking you should drill and tap some holes in the crankcase to put grease fittings in, so you can keep them bearings well lubed.
Should they be standard or metric, course thread or fine thread or straight fittings ar angled fittings, Please specify.
Maybe these animations will help.
parrisw
Tree Freak
Should they be standard or metric, course thread or fine thread or straight fittings ar angled fittings, Please specify.
Depends on application. Please be more specific.
Post a disclaimer.....
Somebody may actually believe this, and try to grease the crank bearings, since they already have their saws apart looking for defective cylinders.....
Somebody may actually believe this, and try to grease the crank bearings, since they already have their saws apart looking for defective cylinders.....
Bowtie
Gearhead
Damn there is a whole lot of BS going around here lately...and THEY know who they are.
