30 Piece Specimen Comparator&Roughness Comparator (30 pcs/Set) of Roughness Tester

Roughness Comparator (30 pcs/set)This set contains standards of the six most important machining methods in the prevalent "AA" values. These surface roughness is used to compare and determine the degree of the surface finish by comparision method and eye estimation or magnifying glass.The surface rough contast blocks is made of 45 super carbor steel except the GCr15 which is using to plat lapping the sample block. All 30 speciments are calibrated in u''AA (Arithmetical Average) and in the metric equivalents um Ra.

• 2 years quality warranty
• contains standards of the six most important machining methods in the prevalent "AA" values
• All 30 speciments are calibrated in u''AA (Arithmetical Average) and in the metric equivalents um Ra.
• Excellent quality, high Precision.