magnetise a cranksharft

[brettau]

Hello to all I am a total novice in this field. I have a small 100cc 2 piece crankshaft that weighs nearly 4kgs. when the crankshaft is put together the middle of the crankshaft is a 10mm gap between crank 1/2s for a 6mm conrod hope you got that bit.ok if you magnetised the whole crankshaft plus conrod in three parts or maybe not the conrod I don't know. my interest in this is if the crankshaft is spinning at 14000rpm with 2mm gaps between metal is there any benefit and the magnetic field what's happing. the crankshaft is from a Yamaha kt100s kart motor if you look at the specs it will give you a lot better idea of what I am looking at. Cheers Brett

 

[cloa]

Sounds like a machines and machining forum question- please Clarify what is the question.

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[tbuelna]

The Yamaha factory service manual for your KT100S engine shows for an assembled crank there should be a gap of 2.70-3.05mm between the rod face and crank face with the rod pushed to one side. It appears your S model is different from other KT100 models (J, SC, etc) in this regard. The other KT100 models use a washer on both sides of the conrod, and so the gap is much smaller (<1.0mm). You should also make sure the measurement between the crank main journal thrust faces is within 45.8-45.9mm.

I don't understand your question about "magnetic fields" in the rotating crank assembly.

 

[ornerynorsk]

You want the magnetization to help keep the conrod centered on its journal?

It is better to have enough ideas for some of them to be wrong, than to be always right by having no ideas at all.

 

[MintJulep]

No. There is not.

 

[Tmoose]

2 stroke engines with "piston guided" con rods usually have huge big end side clearance.

I'd be some concerned that ferrous debris might choose to hang around a magnetized crank assembly.

As far as power boosts from the interaction of the magnetic forces, that would fall under the category of perpetual motion, or something close to it.