Thought i would share this with you all as i have mentioned this project to a couple of folk recently. Its a mix of engineering fabrication and smithing. The materials are Phosphor bronze and coldurA a silicone bronze. The smithing exercise consisted in the forging of the female socket to accomodate the spindle (sq stock). I only have 5/8 coldurA so this was forged to 3/8 sq and then forged, on the diagonal, into a 5/8 round bottom swage giving a half round section. I then doctored an old chisel that gave a profile of 90 degrees and centered it along the length of the half round sect in the swage and continued to thump!! I had made a half round sect with a 90 degree v slot.
By repeating the process i had in my posession the bones of the female section, this was tig welded and dressed. I only made one female section per handle set and permanently tigged the spindle to the other handle. Ten sets later, and some many strokes of the file, patinated done deal.