Figuring out radius differences

[PeterT]

That looks pretty good. The only thing is the torque is being exerted to the adhesive area in shear. I seem to recall about 4000 psi but probably varies by Loctite.
Maybe drill some holes on the split line & bond in some steel dowels as circular section keys?

 

[DPittman]

That looks pretty good. The only thing is the torque is being exerted to the adhesive area in shear. I seem to recall about 4000 psi but probably varies by Loctite.
Maybe drill some holes on the split line & bond in some steel dowels as circular section keys?

I didn't really consider that, and I think your suggestion of some dowel/pins would be a good fix for that. However I'm doubting the torque in this application will ever be enough to shear it off as is.
This is small pulley on the end of a die grinder that will be belt driving a spindle for a tool post grinder. It is quite likely the whole project will get scrapped before completion as many of my shop hairbrain ideas do. But I usually learn something in the process fortunately.

 

[RobinHood]

As @PeterT suggest to help with torque.

Or, as I posted earlier, a couple of little pins from the side into the wedges will help with torque issues as well.

 

[whydontu]

When I’m sizing components for industrial valves, ISO 5211 12mm double-d shaft will support about 60 Nm / 530 inch-lbs of torque at low rpm

ISO 5210 covers rotating shafts. 12mm would be rated at 20 Nm, 180 in-lbs. 15ft-lbs. I seriously doubt you’re going to have 15ft-lbs at 30,000 rpm. That would need about 85 hp drive.

Clean it spotless, red loctite, use loctite primer if you want belts-and-suspenders quality joint.

Or pins, but I doubt you would need them and going to be tricky to balance for 30K rpm.

 

[Susquatch]

I just so happen to be working on todays machining project, the software was up & running LOL

Don't be so modest Peter. You really are fast. I've noticed and said so before. Its impressive.

 

[Former Member]

TIG??