Re: Chama Shop Update

Russ489 Wrote:
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> The #3 driver for 488 has been unloaded and set up
> in the quartering fixture. The pins were found to
> be a little out of quarter and were machined to
> bring them into the proper 90 degree offset.
> [attachment 40711 3wheelquartering2.JPG]
>
> Machining the first pin.
> [attachment 40712 turningpinR3small.JPG]
>
> After the first pin is turned the table is rotated
> 180 degrees to line up the other pin.
> [attachment 40713 3wheelquartering1.JPG]
>
> There were purpose built quartering machines
> specifically for this work. The shop built
> fixture we use accomplishes the same thing but
> takes more time and care in setting up to achieve
> accurate results.
>
> With this work complete, we can finish machining
> the driving boxes and plan to have this driver
> back under the engine sometime next week.
So I am presuming that each time crank pins are 'quartered' a little material is taken off and thus the pin gets smaller, so new bushes are machined up to suit the smaller crank pin size?
If so, how much smaller or how much material had to be removed in this particular operation?

Wayne from Oz