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topic 5658

German Surface Finishes


2000

Q. I'm trying to translate some German drawings and can't seem to find any correlations for German surface finishes. The numbers range from 1-4. How do they correspond to numbers used in the states (32, 63 etc.) Thank you for your time.

David Meade
- Kingsport, Tennessee, USE


2000

A. David:

Germany uses metric measurements. If I assume right, the 1-4 should be micrometers(µm). 1 microinch(µin) = 0.0254 micrometer(µm). 1-4 µm range = 39.37-157.48 µin. I hope this is useful. If I am assuming wrong, I sure someone will lets us both know. Good luck.

Bill Boatright
- Raleigh, North Carolina



A. Hi David. Personally I think it's too risky for you to hazard a guess what "1-4" means. Bill is right that 1-4 microns corresponds to 39.37-157.48 microinch, but we don't know if it means Rz or Rms if it even means those microinch values. Good luck.

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey



March 13, 2014 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. I HAVE A DRAWING THAT CALLS FOR A SURFACE FINISH OF Y. WHAT DOES THIS EQUATE TO IN ENGLISH SCALE?

Denny Koser
- Texas


March 2014

Hi Deny. Please upload a pic of the symbol in context on the drawing and help may be available.

Regards,

Ted Mooney, finishing.com
Teds signature
Ted Mooney, P.E.
finishing.com
Pine Beach, New Jersey



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