:
The aluminum billet version was getting expensive. The material
alone was $66. I know I just bought some today. I had to pay $16 just
to have it cut to lenght.
Then I was having trouble finding suitable 10 mm 1 mm pitch metric
screws. I never found any I was completely satisfied with. Making
our own was getting expensive.
The welded version can use the stock 10 mm 1 mm pitch bolts as it is
only .125 thick which can replace the stock clamping plate
The light really went on when I thought of welding the walls
directly to the steel spline plate.
No bolts or screws needed to bolt the spline plate to the coupling.
The spline plate is half the coupling.
Nothing could be easier or simpler.
The walls are rectangular .75" by 1.5" 4130 tubing from Aircraft
Spruce. I have some in stock.
There must be only three walls because there are six 10 mm bolts.
Here is what it looks like. It fits the stock 2 rotor flex plate but
does not stress it. All torque is transmitted by the six 10 MM
bolts.
I will weld one up and send it to you for testing Mark.
Paul Lamar
What amazed me is the coincidences. The rectangular tubing just
happened to be the right dimensions. There are only two choice's from
aircraft spruce. 3/4 by 1 1/2 is one of them. This leaves plenty of
room for a couple of needle thrust bearings between the spline plate
and the gear box adapter plate.
BTW asymmetric rubber bushing might work out to be the best
configuration. Most of the rubber on the compression side. The acid
test will be the lowest engine RPM that does not cause resonance.
That does not mean it is not mitigating destructive torque pulses at
higher RPM's. The kind that shear bolts and pins.
Paul Lamar
Carrie Beasely was right. Powdered metal. I won't weld to powdered metal.
Back to 2 pieces 4130 sheet metal.
Hard as heck. I ruined a band saw blade on it.
It came with all this stuff inside for $37.
Hack saw in the lathe does not work well.
Schabs Parts
12715 old plank road
New Lenox Il 60451
Paul Lamar
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