At 06:21 AM 7/3/2001 -0400, you wrote:
>I need to find a steel distributor gear for a Mallory Unilite. Anyone have
>any sources of gears that are pre-drilled? Ford Motorsports and others have
>steel gears that need drilling and I am told this is a real pain.
>
>Thanks for the help.
>
>Jim Morrison
>'66 Mk1A
Jim
The hole in the distributor shaft is not exactly the same in all
distributors. The clearance settings require that this gear be located for
your application and then drilled. Ford suggests cross drilling in a
different location that misses the original hole. I prefer to measure the
existing hole very precisely and use my mill to make a hole in the gear, at
least half way thru. To do this you'd have to measure the distance from
the end and the typical offset of the pin from the true centerline of the
shaft, along with the high tolerance distance from the reference to the
bottom of the gear. Then you can finish drilling the hole in the other
side of the gear and install the pin. It takes longer this way, but you
avoid weakening the shaft that turns the distributor and more importantly,
the oil pump. If you "blow it", you simply re-drill per Ford's instruction.
Tom
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