Suitable filament for printing a high torque shaft coupling
Due to some obscenely long lead times provided by my hydraulic equipment vendor, I'm doing some research on what printer/filament combination would be necessary to print a replacement spider coupling for a hydraulic pump/motor combination. The math says that the coupling would have to withstand 900 ft-lb of torque. There is a 20 hp motor on one side of the coupling and a rotary vane pump on the other. The coupling would have a 1" ID and use set screws to tighten the coupling halves to the shafts. Any recommendations would be appreciated.
RE: Suitable filament for printing a high torque shaft coupling
Your biggest challenge is going to be printing orientation so that forces are not aligned along layer lines, I would recommend designing so that it is printed at a 45 degree angle from the build plate. Slant 3d and a couple other youtubers have videos about how to accomplish this.
As far as materials available to print at temperatures achievable by most consumer printers I would recommend either a Polycarbonate or Nylon. The CF is not strictly necessary for strength but it makes the PC easier to print without warping. The only PCCF I've used is Prusa's and that can be hard to find. I have seen some good reviews for YXPolyer PC-CF (on Amazon). I have had good personal experience with Overture Easy Nylon as well.
Regards,
Steve