Ok I misunderstood. Thought you were converting completely to belt drive not just wanting to connect motors. Forget what I said that doesn't apply in this case.
Still use HTD thou.
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Ok I misunderstood. Thought you were converting completely to belt drive not just wanting to connect motors. Forget what I said that doesn't apply in this case.
Still use HTD thou.
I'm using 18 tooth HTD pulleys for exactly this from belting online with 2x M4 grub screws. Seem to do the job so far. Model number (18-5M-15F) (HP18-5M-15F)
I think I remember from figuring it out at the time you want as many teeth in contact with the belt at once to reduce backlash, so larger pulley the better, but also you want flexibility to increase or reduce the ratio later on without having to buy all new pulleys for everywhere.