Very often bearings are hard to remove without putting pressure on correct bearing ring, thus brinneling the bearings. Therefore I used no hammering and minimum amount of pressure. I want to measure/check the bearings.
I am not mechanical engineer, but there are quote a few I can talk to and one in particular has been designing and making big industrial gear boxes and developing methods to produce parts of them. Like to talk to him, because he is very hands on person, although got later in life doctorate degree, cut's fast trough bullshit and tells me often that I have been reading too much and spent too little time looking bearing tables and intimately understand what they actually mean in practice.
I rinsed the bearings yesterday with grease remover, dunk them on ultrasonic cleaner, dunk them on IPA (to remove water) and gave a drop of oil to be able to check them.
Then a friend came to check them. He said that the bearing surfaces looks pretty much good enough and I could clean then further (looks like grease interacted with cage and "plated" it) and reuse them. Totally unexpected. He explained that the noise I heard most likely came from gunked grease and released "plating" from the cage.
2305 bearings have certain amount of play, C3 internal clearance seem to be standard, threfore the play I measured from floating end is not alarming for this bearing type.
http://www.skf.com/pk/products/bearings-units-housings/ball-bearings/self-aligning-ball-bearings/self-aligning-ball-bearings/index.html?designation=2305%20E-2RS1TN9Values: ISO 5753-1. Values are valid for unmounted bearings under zero measuring load.
http://www.skf.com/pages/jsp/catalogue-table.jsp?id=tcm:143-138591That means effectively that I should mount the wheel on the other end I had it.....no problem. I need to buy the belt anyways, might use 30€ for new bearing and dab it with good grease.
Other end (2*6305 deep groove ball bearings) is still under consideration, exact replacements are hard to get, original ones are shedding debris from ball cage and they are not measured yet. I may need to buy pretty good ball bearings, measure axial deflection under preload and stack them with shims between inner and outer races...never done it on this accuracy, would be new and firs one for me.
I need to buy belt anyway, I'll give me few days to think this over and maybe I can devise ways to measure old and new bearings?
Pekka