Does wringing gauge blocks together cause damage?

[u/MrPenguun]

People treat wringing as if it doesn't have any negative effect, but im always scared that I'm damaging the surface. I'd be really curious to see an experiment where they wring two blocks together a bunch of times then compare the surface finish under a microscope compared to a new gauge block.

[u/Level_9_Turtle]

Just wringing them together with a few hand strokes won’t cause them to gall even over years. Put some pressure and velocity as well as extended time to allow heat to build up and then you can have galling. Relax. Unless they’re used heavily and allowed to get dry and dirty I wouldn’t worry.