For those who have ordered stainless steel valves...

[ThirstyThirty]

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Originally Posted by Joe K

If you really want to hear the "touch touch touch" of the grinder on the valve, just take them out of the chuck, turn them 180 degrees, and chuck and grind them again.

Repeatability is an issue in the real world. There are machines of better repeatability - but there is no PERFECT repeatability.

The real question is how far out of concentric can you truly tolerate.

Joe K
Who does um, ok in a lathe made in 1871. Flather Serial Number "1."

I am not a valve grinder/cyl head guy... but have done my share of clean up work. have my own hand tools, lapping compounds, etc. I always thot the final work, prior to parts clean up was hand lapping in the seat and face... to ensure best possible concentricity and sealed setting seat.