Joining two brass components - advice?
I have a 8mm long, 10mm round brass shaft (A) to which I need to join a 7.7mm splined shaft (B) - [U]as strongly as possible.
[/U]
Thus far I have tried:
Threading shaft (A) to 5mm (fine 0.5mm), threadlocking into 5mm threaded socket on B - sheared when looked at heavily!
Turning down splined shaft (B) to 6mm, drilling B out to 6mm and inserting a 1.5x10mm springpin - sheared at pin drilling! BUT the drilling was only 2mm from the shoulder.
The weak point seems to be the shoulder all the time. So, my next thought is turning the splined shaft down to its inner diameter 6.8mm for 7mm then drilling part A for a 2mm brass pin say half way up and using a cyanoacrylate adhesive on the whole thing. It does not need to be demountable but it does need to be simple to assemble...
Alternatively, I thought a 6.5mm fine thread on the splined shaft, tap part A to 6.5 and then use a lock nut to lock it to part A?!
What's wrong with my ideas? Does anyone have any better please?