Disk Skimming - A4 - how can it be soooo difficult ??

[Z1B]

Yea mate spent most of my working life on machines, time served maintenance engineer, got a lathe of my own (Colchester Triumph) which although old has been maintained to work, as you say when you learn of of the old school, you learn many tricks, guys nowadays think oh well just put a new tip in LOL things should be happening, they dont have a clue about how to hand grind tipped tools (not disposable tips) to get under the skin, anyway, turning requires more skill than grinding, the main skill there is keeping the grit of the wheel open (quick pass with the diamond) and using the correct type of wheel feeds and such like are important, but generally if you dont try and take too much off they are more forgiving, aye as you were sayingthe old boys were the best, learned my lathe work on a tool room Dean Smith and Grace, very accurate machine, and the turner was about retiral age

[sid123]

Guyz,

Sorry, but I do not believe in "skimming" discs.

They warped for a reason, ie too much heat.

Skimming is going to make future warping more likely

Skimming is the way by grinding ( not turned on a lathe with cutting tools = wrong surface finish ) - using a proper brake grinding machine - it is a round surface table which is motor driven - which has a grinding wheel that feeds a cut across the surface - trick is grinding mounting surface and back of disc surface and then turning over and using created datum face to ensure disc is not thick / thin -

A reground disc will usually be a better disc from the point of view of future warping as it will no longer be "green " and any internal metal stress will have been relieved - those who understand the reason will also know this is why competition engine builders will use an engine that has covered many thousands of miles as a basis - e.g renault F1turbo race engine blocks

[jimmock]

Sorry guyz,

Just march on and skim / grind / file / rub with emery cloth / etc your discs.

I wont be.