hi, some people have far more experience than me on this "o" rin
business but i find this way works fine, i dont bother with the "o rings, i use Pro seal, blue xs advanced rtv silicone, you can get i from your local motorist accessories shop, its in a blue tube, it take about a day to cure and is excellent for sealing cylinder heads, valv chests, shafts ect, the way i use it to seal the shafts is to firstl put a good dolop of oil onto the shaft and run a bead of sealant righ round till they meet, the oil stops the sealant from sticking to th shaft , get a very thin rod and mix in the two ends, then let it cure this way you get the right size homemade "o" ring, gently tightenin the flange to the gland compresses the seal to the shaft with minima friction on the shaft, i put a little shamfer to each mating face ,thi aids the sealing. i have found it very good as an all round sealant fo machinery it is very strong unlike some other gasket sealants and cos about £4.50 for a fairly large tube. hope this is of help to you
-- blueswar
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