Nickel Surface Roughness Comparator

Rubert SA2.5 Shot Blast and Grit Blast Surface Comparator

A precision Nickel comparator plate which conforms to International Standard ISO 8503 for grit and shotblast surface roughness comparison measurement. Popular comparators for shot blasting comparison When steel has been blast cleaned, the surface consists of random irregularities with peaks and valleys that are not easily characterized. 

• Fine-grade:profiles equal to segment 1 and up to but excluding segment.
• Medium-grade:profiles equal to segment 2 and up to but excluding segment.
• Coarse-grade:profiles equal tosegment 3 and up to but excluding segment 4.

Section Profile Metric:25μm, 40μm, 70μm, 100μm

Section Profile Imperial:1mils, 1.6mils, 2.8mils, 4mils

Rubert 130 Composite Machine Surface Comparator :

In cases where surface roughness needs to be measured with great precision, elaborate instruments must be used. These are expensive, and often unsuitable for workshop use, where roughness of machined surfaces can usually be assessed conveniently and with sufficient reliability using visual and tactile (fingernail) comparison with a standard set of surfaces machined in the same way. This set consists of 30 comparison specimens, covering six of the most commonly-used machining methods: 6 cylindrically turned, 6 end-milled, 6 horizontally milled, 6 surface-ground, 3 lapped, 3 reamed/drilled. The label states the Ra values of each specimen in both metric and imperial units. 

• Turning: 0.4um, 0.8um, 1.6um, 3.2um, 6.3um, 12.5um
• Vertical Milling: 0.4um, 0.8um, 1.6um, 3.2um, 6.3um, 12.5um
• Horizontal Milling: 0.4um, 0.8um, 1.6um, 3.2um, 6.3um, 12.5um
• Grinding:0.05um,0.1um,0.2um,0.4um,0.8um,1.6um
• Flat Lapping Reaming:0.05um, 0.1um, 0.2um, 0.4um, 0.8um, 1.6um