I am looking for a female spline that will fit
   the output shaft on the TC gear box.
   It is 25 mm OD with 18 splines.

   It is about the same OD as Tracy's spline plate but
   far fewer splines.

   Anybody know their splines ? :)

   Paul Lamar

    Paul,  I would call Hayes  Mfg Co at  231-879-3372  and ask for a code
 99 (special spline or bore)  jaw type steel  shaft coupling sized for about
 40 HP. A Hytrel insert and the metal ring external retainer. You will also
 need the bore and key measurements for the E-shaft nose.
    george grimes

 The screw in the end of the e-shaft is high torque. I'll weld
 a socket on the end of the coupling shaft and connect it that way.

 The spline was a press fit so I am sure it is a custom
 spline.

 I have decided to use the gear as part of the coupling.

 I want to get that gear normalized tomorrow and turn it down.
 If I get it up 1650 F or so and let it cool slowly will that do it?
 I have a small electric oven. Less than a cubic foot. What
 is the best way to let it cool. Can I just turn off the oven?
 Will that cool slowly enough?

 Max torque will be about 50 foot pounds at 6000 RPM
 What kind of mcmaster carr coupling do you recommend?


 A "Multi-Flex Shaft Couplings" looks good.
 6,000 RPM but only 450 inch pounds.


 Paul Lamar

On second thought I'll  never get the TC gear box and 3 rotor engine
aligned well enough to use a simple coupling. Plus they will
move around slightly while running.

I am going with a double u joint shaft like this.

Paul Lamar