Stainless Steel Bushing

[Wongster]

easymike29,

Thanks. The width of the countersunk is too short for any reading. Maybe I was doing it wrong... Anyway, my dad reported the aluminium test pieces works! So I'll stick to moving in the countersink bit 1.5mm.

I went out this morning to the metal shop to try get some 304 before the scheduled dental surgery in the afternoon. Bought about 1.3m cut into 4 pieces of 14mm diameter.



Didn't expect them to be within 0.01mm (13.99mm, according to my Mitutoyo digital vernier)!

I also bought a lamp on magnet:


Got home, started working and get to the last stage where I need to do the countersunk hole. This was used successfully on aluminium but it didn't seem to work on steel:



Anyone know if this is only for aluminium? It just refused to go in after clearing up the burrs.

By the way, 304 cut much easily than the silver steel I tried while making the setover centre. When I get to below 10mm, the chart on the lathe suggested going at 1400 rpm. I usually turn steel at 660 rpm, moving in the cross slide at 0.5mm per pass, for diameter below 20mm.

I won't be doing any turning tonight. On medication to kill the pain after the surgery. I'm into my 3rd dental implant and this one has some complication (infection). The dentist has to remove the old screw, drill and tap a bigger hole, and put in a bigger one. The pain is terrible to bear, worst than the other 2. Probably due to the infection. The stitch wound is still bleeding. Been tasting my own blood since after the surgery. Eeeewww....

Regards,
Wong