Caraway
Well-known member
This is no time for having fun!
?@Croftie I am lucky to have your remind. Thank you! It actually should be 1.75 inches. I was using a mechanic calliper and it points to 45mm. Then after seeing your post, I purchased a digital calliper. I measured it again and again, it's actually between 44.3 to 44.5mm depends on the angle while holding the calliper. Plus I realized Americans usually using imperial size. So I eventually bought a 1-3/4 inches coupling. Hopefully, it's the right size.
Steady! Support the coupling on a hefty deadweight before hitting it sideways!No heat applied?
No need to cut all the way on the other side, half thickness and a few blows on a hefty chisel on the cut gap to open the thing!
Actually start with the chisel blows before doing anything else...
tapered , no ?Exhausted! Finally got one coupling to come off from the shaft after 3 hours of trying today. Cut the keyway side all through, and another 180-degree side nearly all through (70% area through and scratch the shaft already). Then hammer it many many times to get it off. The key still sticking on the shaft, hammer it finally gets it off too.
The key was damaged, the 180-degree side shaft also got a cut scratch mark. But I think that it is not a big deal when using the new split-half coupling.