JMortensen Posted February 24 Author Share Posted February 24 (edited) Looks like "shaft adapter" is the term that gets you what you need. 5/16 to 5/8 is not a common size, but 8mm to 16mm is and 5/8 to 5/8 is. Found 2 solutions: put a sleeve over the 5/16" shaft that is 5/8" and then run a straight adapter, or run the 8mm to 16mm. The problem is that there is a flat on the 5/16 and a key on the 5/8 shaft. I suppose I could just get the 5/8 to 5/8, drill a hole in the 5/16 to 5/8 bushing and then use a set screw on the 5/16 side. That should work... Thinking I'll buy the same type of motor Big Al did, along with a bushing and an shaft adapter and see how nice the pieces go together. Should be pretty simple in theory. Theory doesn't always translate to practice though. EDIT--Found a premade adapter for $16. https://www.ebay.com/itm/292457042171 EDIT 2--Bought the motor. Will verify shaft diameters then order the adapter. This is great. Don't have to spend another $200 or try to get rid of the part that I already purchased, and I'm sure the motor will hold up as it's what they use for the other style pump, gets rid of the diaphragm. Thanks Clark, you saved the day. Edited February 24 by JMortensen Quote Link to comment Share on other sites More sharing options...
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