Wednesday, December 17, 2008

Motor Coupler

This is a Lovejoy L110 jaw style shaft coupler body ($44 from http://grainger.com). I went with the L110 because the outside diameter (OD) is 3.32 inches and the slot on the flywheel is 3.1 inches. It will have to be trimmed slightly to fit. The L100 is only 2.54 inches so it would not have been wide enough to fit the flywheel holes.

The The center bore is 1.125 with a .25 x .125 keyway, which matches the L91 motor shaft. It has 3 "teeth" that would normally mesh with another coupler on the drive shaft. I'm planning on cutting the teeth off and drilling and tapping holes to match the flywheel. The flywheel will need to be skimmed down to fit inside the adapter plate in order to retain the "magic number", which I measured as .665 inches. The design program shows the magic number as .78 inches.

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