Stump Grinder -Shaft

[les-or-more]

Seems like a good idea. I'd have to get the machine to room temperate and just the shaft because if the bearing shrinks it will just sit tighter on the shaft. The mechanics is going to let me borrow his there point puller. It looks like a pulley puller but 3 adjustable claws and much larger.

Out of curiosity... What kind of grinder is everyone else using? Ours has been around a long time.

You will still need a bearing separator to keep from damaging the seals or breaking the bearings.
You need to be pulling against the inner raceway of the bearing or the puller will rip the bearing apart.
http://www.amazon.com/s/?ie=UTF8&ke...=aps&hvadid=3527186605&ref=pd_sl_1k0f1pn7lh_e

 

[R DeLawter]

it's counter intuitive, but steel shrinks towards it's centre and doesn't know it's shape. So a shrunk bearing will get smaller in OD and larger in ID.

Makes no sense I know. Way it was explained to me was; if you got a bit of flat bar and froze it, would it shrink on one side, or all round? It would shrink all round! A bearing is just a flat bar bent into a circle. It doesn't know it's a circle, it still shrinks all round.

By pleasant coincidence, the shaft also doesn't know it's a shaft and will shrink too (though not much), meaning they shrink away from each other.

I am going to learn something here: If I freeze a bearing the ID will actually get larger? by .001 or more?

 

[FLtreeGuyVHTC]

In theory... The surface will shrink causing a larger ID but I really don't think this will help.

The puller is large enough to go around the pillow block and seat on the deal closest to the shaft. Hopefully this comes off with out problems. Seems like someone would of used one of these machines before

 

[mckeetree]

If they're not building your barn or bed don't use em

Lol. Got a laugh out of that. About right though.

 

[CalTreeEquip]

Why would anyone take a machine to people who believe that evil resides in machines???
I have had good luck with using spray can dusters. Wear cloves, turn the can upside down and spray the shaft, it will get real cold.
Then use a 1" brass rod and a hammer. Good luck. Usually have to cut bearings off. I bet they didn't bother cleaning up the shaft
before pushing those bearing on.

 

[FLtreeGuyVHTC]

This guy worked on it for 20 years according to my old man. Guy couldn't work his way out of a paper bag. Figured he already did this before. The shaft was brand new. I replaced the shaft, bearings, cutting wheel, belt pulleys... Just about everything is new.

I just want to get this thing working right so it don't break the shaft and hurt someone. The wheel is making horrible grinding noise because the bearings are on backwards and nothing has any room to move.