bonded crankshaft

Beef in preference to Lamb.

Edited By Circlip on 15/01/2010 16:55:08

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You don’t say whether your engine is a single or multi throw, if single I would try to make the crankpin integral with the web and try to bond the web to the shaft with as wide a surface area as possible as well as doweling it. (I have just done this to the Nova diesel engine, see album) If a multi throw – or single pin double webbed -  then try to make as many webs as possible integral with the individual shaft parts bonding (and pinning) the remainder along with the crankpins. >>

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Personally I am reluctant to use silver solder because of heat distortion on parts previously machined as well as possibly altering the characteristics of the materials used. If it was soldered then I would want to machine it to size after – somewhat defeating the object of making and bonding parts together.>>

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Finally I would totally agree with Rob Manley - Loctite needs to be used correctly to achieve the best result. The correct grade and the right kind of fit and, as said, degrease the parts well. When you fit the dowel, file a (very) small flat along its length to allow the Loctite to escape, as the dowel is pushed in this will ensure the dowel goes fully home and won’t be pushed out again by the compression of air.>>

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Edited By Ramon Wilson on 17/01/2010 13:06:15

Edited By John Stevenson on 17/01/2010 13:55:10

Edited By Ramon Wilson on 17/01/2010 18:36:39

Edited By Ramon Wilson on 17/01/2010 18:37:30

Edited By Martin W on 18/01/2010 00:37:56

Edited By Martin W on 18/01/2010 00:40:15