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How do you pin a crankshaft joint?

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Brian H28/02/2017 06:57:34
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2312 forum posts
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Having once having Loctited a Boxhill crank and the parts moving out of position slightly, I can vouch for the strength of Loctite as the parts had to be heated to a dull red before they reluctantly came apart.

Brian

Neil Wyatt28/02/2017 07:31:12
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Posted by julian atkins on 27/02/2017 23:03:59:

The problem with Neil's method is that the loctite sets too quickly, especially when doing a double crank axle as is often the case in miniature loco work with 2 inside cylinders, or quartering wheels in a jig.

It depends which 'Loctite' you use, the retainers generally have quite generous working times, if you use a 'superglue' then you will have problems.

The high temperature 620 has a setup time of 60 minutes which probably makes it the ideal retainer for our steam engine crankshafts.

641 and 660 have setup times of 20 minutes. 232 for heavy press fits and 640 for long assembly time also give you an hour.

Neil

JasonB28/02/2017 07:36:37
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Posted by Michael-w on 27/02/2017 21:01:39:

Is that a granite marking out table I see? Such wanton luxury, JasonB! cheeky

No such luxury, it's a 300 x 600 Porcelain tile. Does the job as my marking out surface. If the models all run why invest in anything fanciersmiley

vintagengineer28/02/2017 10:30:30
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469 forum posts
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Straight knurling gives a good interference fit.

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