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Crank Diameter

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Alan Worland	15/02/2011 21:26:53
247 forum posts 21 photos	I am machining the crankshaft for a Stuart Turner No 4 the drawings of which suggest the main bearing and big end diameter is 7/16 There is plenty of material to come off that I have decided to make these bearing surfaces 0.500 - the main bearings and big end will accomodate the extra. Has anybody else done this and might there be a problem I have not thought about?
John Olsen	16/02/2011 05:21:43
1294 forum posts 108 photos 1 articles	It will not cause any problems, and is a good idea if the engine is likely to do any hard work. The Stuart engines generally are semi-scale, eg they are not scale models of a particular prototype, but are proportioned as if they were. So the journals are smaller than they would be if the engines were intended for hard work. regards John

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