Posted by Paul Van Gaal on February 26, 2004 at 21:12:40:
In Reply to: Re: Conversion between Rockwell R and Rockwell M posted by Gordon England on January 18, 2004 at 01:14:33:
: I have not come across any conversions between these scales. Rockwell R (1/2" ball, 60kg total load) and Rockwell M (1/4" ball, 100kg total load) scales may not even overlap each other.
: The R scale is designed for much softer materials than the M scale. Can only suggest that you have both materials tested using the same scale.
: Regards Gordon
Hi
You could measure both with a barcol 935 impressor, may give some correlation to the rockwell ranges
paulvg
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