You ought to work with a machine shop on this. A good machinist will have a pretty good idea what is required, and the specific alloy choice has as much to do with forming the splines as anything else. It will be as hard a steel as they can put a spline into.
You might consider removing the splines from the transmission end and welding the coupler onto it. Less backlash and less length. - GT > -----Original Message----- > From: Gary Graunke [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, October 02, 2002 2:56 PM > To: [EMAIL PROTECTED] > Subject: shaft coupler material > > > What material is best for a direct drive coupler? I'm having > a coupler made that connects an A/C driver motor (max RPM > 10,000) to a Honda Insight transmission shaft. The piece will > be machined with male spline on the motor end, and a female > spine on the tranmission end. The max torque is 92 ft-lbs. > > Regards, > Gary >
