Wrist Pins. I have questions you have answers

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jgedde

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For my Panther Pup build, I have made many design chnages. One of which was to add a bearing to the ends of the connecting rods. I'm in the middle of making the pistons now and am wondering what's best...

1) Wrist pin pressed into the connecting rod small end.
2) Wrist pin pressed into the piston.
3) Wrist pin floating in both the piston and the conn rod.

Why I'm asking is I really don't relish the use of the wrist pin hole in the aluminum piston being used as a bearing surface. I'm leaning towards option 2... Material for the wrist pin will likely be drill rod - maybe hardened.

Thanks!
John
 
Hi John

My choice would be pressed into piston, you say you already have a bearing in the rod. Use Drill rod for the pin hardened and polished, you may be able to drill the pin full length to save some weight.

Emgee
 
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