Only a Little-Oil-Seal !

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awemawson:
Cradle will also make doing the other side easier - I REALLY should do the other side, but I'm tempted to leave well alone. I suppose if it does start leaking I can drain and reuse the hugely expensive oil I've just ordered (50 litres at £130 inc vat - ouch)

My current concern is the journal that the oil seal runs on - there is scoring on it from a bit of grit - an initial inspection had left me with the impression that it was ok, but now the seal is cut away there is an 1/8" wide score deep enough to catch you nail on. I need to do some measurements to see precisely how deep it is. There a three possiblities:

A/ Use is as is and keep fingers crossed

B/ Mount it up in the cylindrical grinder and loose the scoring

C/ Fit a 'repair sleeve.

A/ Depends on my measurements tomorrow - it may look worse than it is.
B/ Is only applicable if having lost the scoring the journal is still within the interference range of the seal - I think shaft tolerance on this size shaft is +/- 0.003" but I cannot find figures on how much interference is engineered into the original fit.
C/ Would be the easiest, but I've not yet found one this size (3.250")

Good news is that the new bearing 'should' be delivered tomorrow

awemawson:
Just scurried off to the workshop to make some measurements. The seal journal is bang on 3.250" using a Starrett micrometre to measure it. Now measuring the groove is a bit flaky - I had to use a Chinese 12" digital vernier as my Mitutoyo one's jaws aren't long enough to reach round 3.250" - I make the bottom of the groove 3.233 so 50-33 = 17 thou or 8.5 thou deep.

I may turn up a dummy at 3.230 and see how the seal fits on it - no way you can actually measure a seal !

vtsteam:
Yeah you can, just put some sleeping pills in a mackerel and feed it to him.

:wack:

awemawson:

--- Quote from: vtsteam on July 16, 2014, 03:13:59 PM ---Yeah you can, just put some sleeping pills in a mackerel and feed it to him.

:wack:

--- End quote ---

I thought that Vermont was land locked - what do you know about fishes and seals even if you did live on a boat :lol:

Well the good news is I've tracked down an SKF 'Speedi Sleeve of the correct size

http://www.skf.com/group/products/seals/industrial-seals/power-transmission-seals/wear-sleeves/wear-seals-skf-speedi-sleeve/index.html?prodid=791701160

Found a supplier and placed an on line order. I'll need to turn up a collar to install it as the installation tool they supply won't accommodate a shaft of this length

vtsteam:
And another thing learned....never knew about wear sleeves..... :coffee:

Oh the mackerel trick? There's a Roald Dahl story about poaching a flock of game on an estate, involving sleeping pills and raisins. :lol:

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