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  • what is the shaft size does this suit?

    All of our motor pulleys have an 8mm bore. You can fit an 8mm motor shaft with a keyway (3mm x 3mm).

  • Am I able to make the bore bigger it's too small for my shaft

    All of our motor pulleys have an 8mm bore. You can fit an 8mm motor shaft with a keyway (3mm x 3mm).

    Yes, you can but you would want to get it completely centered.