Morning All.
A damp and dreary BH Monday here.
A s ore neck from all that craning & peering at the lathe yesterday.
Have a great day off.
BTW I forgot to bore you all with what I did, so here goes...
Well it was a mixed-bag yesterday, some good bits and some not-so-good bits.
I started to cut the internal circle out of the plate with a standard 6mm tall parting blade and it wasn't too bad; right up until it was sufficiently deep in the metal for the blade to begin jamming and screeching.
This because I was asking a straight tool 6mm tall to operate in a trench that was the curve of the circle that was being cut. Obvious really I suppose.
This necessitated an alternate approach. I removed the plate from the round spigot and swapped the 4-Jaw chucks jaws around for external holding pattern.
But how to centre the work piece with precision? Well, it's not as easy but it can be done and I did get the plate centralised to within about a 'thou.
I then used a hole-saw in the tailstock chuck to remove a decent sized section.
I then did a series of internal "facing" operations to remove all the material you can see from the hole-saw hole to the trench that the parting-off blade had formed.
I then turned the workpiece around, centred it up again and tidied up the inside face.
And here is the finished "giant washer of doom" sitting on top of the SA 8Spd hub flange. It is not as snug/tight a fit on the flange as I would ideally have liked but I was anxious not to encroach on a bevelled/filleted area of the flange. I think it will be OK.
