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Letter 39016
Want a visual Ra comparision chart
[Wisconsin]
January 13, 2006
I am looking for a visual comparision chart for Ra surface finish
values.
Gary Merkel
tool & die - Richfield, WI, USA
First of three simultaneous responses -- January 13, 2006
You will find comparator metallic plates. They can be either
manufactured to your specs or according to vendor's standards in
stainless steel, vacuum or galvanoformed.
Guillermo Marrufo
Monterrey, NL, Mexico
Second of three simultaneous responses -- January 13, 2006
A visual "Ra" chart is going to be terribly subjective. Light
reflection can be seriously different between straight line sanding
and single point machining, grinding and dual action sanding, and
blanchard grinding.
James Watts
- FL
Third of three simultaneous responses -- January 13, 2006
McMaster-Carr will sell you a comparator sample plate, or any good
tool supply company.
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Jeffrey Holmes,
CEF
- Spartanburg, SC, USA
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January 23, 2006
I agree with James from Florida. Your best bet is to just break
down and buy either a surface gauge or profilometer. Way too many
variables.
Brandt Hinton
- Elk River, MN, USA
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