1 1/2 in. bushing
thingiverse
This is a bushing sporting a sturdy 5/8 inch shaft and a precisely engineered 3/16" keyway. The outside diameter measures exactly 3". Be prepared to drill the hole for the set screw yourself, as it will comfortably fit within a 1 1/2 inch hole. Originally designed for a woodworking project, this bushing's versatility makes it suitable for various applications beyond that initial purpose. If you plan on pairing it with a 1 HP or higher motor, consider utilizing ABS or even lost PLA casting for added reliability and durability.
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