winabbey wrote:
simonw wrote:
Hey Timmy ,
Was thinking about that too. I think lapping them in setup should make it all good.
Zinc has 1/3 toughness of steel , so yes it will wear quicker.
Good spot though
That's why I would resist plating items like ball pins and sockets, and other parts with a load bearing surface. I guess it's a personal decision.
I bought some grade 8, 3/8 UNF hex bolts once to fit the Mini ring gear to a Quaife diff. These were zinc plated. When I got to 45 lb/ft torque the threads all peeled off. They are supposed to be torqued to 55 lb/ft.
So now I don't trust using plated bolts for high torque applications..
I went back to the fastener shop and bought some grade 8 black ones, they torqued up with no problem.
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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.