View Single Post
  #10  
Old 09-29-2014, 05:55 AM
WBE WBE is offline
Skilled
 
Join Date: Feb 2009
Posts: 484
No one is calling you an idiot, and your conclusions are probably dead on. Typical Rc testers must have the test piece at 90? to the penetrator, and have full support underneath the piece being tested. If these requirements are not met, you have wasted your time, because you will not get an accurate reading. A good comparison of grain size is to match against a broken "quality" file, such as an older Nicholson, Simmonds, or other trusted brand.
Reply With Quote