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PJTOOLMAKERS Unimat variable speed replacement motors come with 12mm double groove pulleys. The 12mm double groove motor pulley is the smallest size available pulley.

For 5mm diam. round drive belt, the effective pulley diameter (EPD), or pulley pitch "c" is approx. 17mm.

For 5mm diam. round drive belt, the value "Z" (belt length pulley diameter) is approx. 14mm

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We can offer second type of motor pulleys. They can be connected to our motor's shaft by means of our brass pulley hub.