Post #403576 by surfintiki on Sun, Aug 24, 2008 10:37 AM

EXACTLY! That's why I feel like an idiot bonehead. The grinder says on the label 1/2" arbor. What's that? The arbor hole?
The Ryobi rep said it is 5/8" - 11. He's full of malarchy. That must be the main shaft within the grinder itself?
But yes, the G5553 5/8 is too big.
The Grizzly guy had me measure some stuff on the Grinder shaft.... total length of threads(along shaft) =5/8", approx. 8 threads in that space.
On the shaft closest to the grinder case, shaft was at it's widest, then where the collar to hold the washer, it drops to a little narrower. Then where the threads are, they are even narrower (very outside tips of threads).
Although hardware store clerk tells me this is a standard size for bench grinders!
TikiMango PM'd me to say he knows a machinist who could make an adapter in 45 mins! That's cool, but I think I'd have to send the grinder out, to make sure we have right sizes.
-I'm going surfing.