Hugh Fader wrote:
> I bought 2 new front stub axles for my TR6. After installing them and
> assembling the front suspension, and installing new wheel bearings, I found
> the bearings wouldn't fit over one of the axles. I called Moss and they sent
> me another axle which I received today. Bummer. This one doesn't fit the
> bearings either. I thought I might have been doing something wrong or there
> was a problem with the bearings. But the other wheel's bearings won't fit
> over this axle and neither will the old bearings.
>
> I have another call into Moss and the rep was going to check their stock and
> see if their bearings fit their axle. Haven't heard back yet. I measure the
> diameter of the new axle where the inner bearing fits at 1.004-1.006. Seems
> like an odd size, but I don't know.
>
> Anyway, I thought I'd check with the list and see if there's any possibility
> I'd goofed up somehow. I'm bummed out I may have to pay for more shipping
> and wait another week for another part. Any thoughts?
There have been some problems with other parts not fitting (notably
lifters being too big for their bores). I seem to hear this about
parts requiring heat treating. It sounds as if a supplier is not
paying attention to the size after heat treat (which generally
causes the part to grow a bit). A good designer will do one of two
things--either to specify the finish part size before heat treat as
slightly undersize so the part grows to the correct dimension, or
specifies grinding to size after heat treat.
I'll bet that the supplier ground the stubs to the finished
dimension, then sent the parts out for heat treat, without further
finish grinding. I've seen machinists kick themselves for doing the
same thing.
Cheers.
--
Michael D. Porter
Roswell, NM
Never let anyone drive you crazy when you know it's within walking
distance.
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