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Spindle problem with cincinnati tool and cutter grinder 2 spindle

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gerritv:
Very methodical and for me educational. I won't fear my eventual spindle bearing replacement as much as I did before.

PekkaNF:
Thank you.

I am electrical engineer, but I have been tinkering with machines all my life. At one point I was involved in servohydraulics and mechanical maintenance. It is diffenet to follow guidelines and practices or design something new. This is something old and obiviously clearly successfull design that I can't rebuild (blueprit) with original parts, I have to get a little creativive with different rpalacement parts that went in originally.

I know a little of some things and when I try to do something rather new to me, I try to learn enough. But at the very begining of learning curve it is really hard to find out what is essential and what is not and some information you get it wrong or not really usefull on the application you have at hand.

Like lubricant and clenliness. Someday it is rally not that critical, and on some systems it is laa important.

I'm prepared to wash all parts, dewater, lightly oil, use lintfree cloth to clean all critical surfaces and use clean good quality grease fron new tube. But I'm not going all grazy about filtering all liquids, air and grease.

This assembly is a bit tricky: There is no provision for removal of the bearings from IR, therefore have to get them right first time. Both ends are removed by pulling the bearing from OR and that transmits the extraction force wrong way: OR->balls->IR and the IR is mounted with light press fit, this could mean brinneling the bearings.

So I have to mount bearings to shells, calmp OR very lightly to keep the bearings in place and then press bearing IR to shaft using a fitting bushing. Will need to "dry" run the thing without bearings, to make sure I have all bushings and pads ready before I start the work.

I have to measure the belt carefully. Looks like I can't order the te belt and bearings from one place, so postage will add up a little.

Pekka

PekkaNF:
About belts, flat belts and their reliability I should know something.....

But I rather use calculators, because they tell me is something looks about right or misses the mark a mile or more.

So, I streched the original belt over two 25 mm OD electric conduits (sor of like pulleys) meassured the max. distance, streched hand force and youg tape manipulation and got result of 1083 mm, threfore the belt length is about 2195 mm, tried to cross reference that agains information on net.


Used this calculator:
http://best-drive-belt.co.uk//belt-calculator/flat-belt-calculation.html

Bit of monkeying arounnd with numbers to make them sit into actual physical parts and calculator looks like this:

So, I'm thinking of buyin this belt 25 mm wide. What do you think?
http://best-drive-belt.co.uk/flat-belt/flat-belt-det.251202200.html

Pekka

PekkaNF:
Could not buy the belt! I have been buying from them before, but this time I typed in all the info address and all and when I got to pay, I got blank page. Three tries with two different browsers.

I could not find right away anywhere shop that a) has web shop that sells to private customers b) has any technical data in it.

This looks iffy:
https://www.accu.co.uk/en/flat-belts/39064-B-F-25-2200

Any EU-area shop suggestions?

Got the bearings ordered, with plenty of shims.

Pekka

PekkaNF:
That supplier never answered on my email. Ordered belts from Finnish company. All up cost about 95€ for two belts delivered home (minimum order of 2 pcs. from Germany).

I don't have yet bomb proof way to measure axial/radial play and TIR on individual and mounted bearings....have to device something. Need first pretty close to 25,00 minus tolerance short shaft to stack the bearings and measure clearances.

Pekka

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