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Spindle problem with cincinnati tool and cutter grinder 2 spindle

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gerritv:
Good news then! At least it will come apart for the next stage.
If the bearings are a matched pair there will be a small round fuzzy mark on the outer race. These marks are supposed to line up with each other according to my local rebuilder. As Pete said maybe it doesn't matter for our uses as hobbyists but I can't help wonder about other bearing characteristics such as tolerances. High RPM generates heat and it has to be dissipated to avoid seizing. (I heard of some people who didn't want to pay for the correct idler bearings on Ferrari 308 engines, a bearing seizure at 7000rpm is spectacular in its consequences! I chose not to cheap out when I did the belt change on my 308GT4 :-)) There are probably some identifiers after the main bearing number that indicate fit/tolerance.

Perhaps that Oil bolt belongs somewhere else? My ancient machine has an oil hole that goes nowhere as well, perhaps a trademark of Cincinnati :-)

PekkaNF:
Jeah, I know the feeling of the cheap bearings and fear of knackering the expensive ones in assembly. It's funny how people learn word "brinelling" and how descriptive it is on wrong handling.

I have this growing suspicion that least free end has two deep groove ball bearings. I'll be damned if the other end does not have pair matched angular contact bearings in DB (back-to-back) form. But lets see....I'm easily surpriced and entertained. :scratch:

Pekka

PekkaNF:
Removal os pindle and flat belt was really easy.

Marked the parts with permanent marker and started taking the spindle apart.

Bearings came out easy. There is big extractor on the picture, but I used only hand tight, the double ball bearings came out easy, without resorting spanner at all, the single double row ball bearing needed a touch of spanner on the puller and that too came out easy.

Pekka

PekkaNF:
The bearing arrangement was really unusual...all metric bearings - made in usa!

Outside diameter of the spindle housing(s) is about 77,78 mm. Must be something magical, like 3".

The other end had a single SKF 2305, nominally 25x62x24 mm bearing, no special markings or anything, just "NW05" on outer ring. Probably nothing magical on this one?

This probably would do:
https://www.agrolager.de/product_info.php?products_id=12100840

The other end is completely different story: pair of 6305 SKF 25x62x17 mm bearings. That size is very normal and standard, but rest of the bearings are bit different and I don't know what to make out of them.

Those bearing have markings all over them. There are max TIR marking on outer race/inner race, alignment marks on outer races and then some markings on inner ring that I either have wrong or I simply don't get them

"6305 C7 B3 G1" or something like that. C7 does not make any sense. Maybe it is C1, which is very small internal clearance, out of normal bearings that stop on C2. CN is normal and C3 bit more clearance. Another thing is that this should have accuracy class like P6 marking in it or down to P4 (ABEC 7).

Trying to hunt down something semi decent like 6305.P6 FAG and see how far it would take.

Don't like them completely open, but probably non contact seals were not available at that time. Least not on spindle bearings.

ideas?

Pekka

gerritv:
Which bearings were at the 'spongy' end?

The matched ones have a lot more markings than mine.

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