How do you use surface finish comparator?

How do you use surface finish comparator?

How to use a Surface Roughness Comparator

  1. Place the roughness scale next to the work piece.
  2. Slide the various scales next to each other so that the comparator scale area is adjacent to the surface you are measuring.
  3. Compare by drawing your fingernail across each surface at right angles to the tool marks.

What is a sand comparator?

A range of comparators for inspection on shot, grit & sand blasted surfaces. Surface comparators are used to compare freshly blasted profiles to pre-defined profiles. The comparators are available as grit, shot or sand and comparisons can be made visually or by touch.

How do I check surface roughness after blasting?

By placing the Tqc replica tape on the surface and rubbing over it, the Rt (total roughness) or peak-to-valley height of the profile can be taken and then measured with a film thickness meter.

What are surface finish comparators?

Surface finish comparators are tools that quantify the surface quality of a material that has undergone machining and surface finishing processes.

What is a grain size comparator?

This grain size comparator card identifies sand granules in six sand grain sizes and shapes ranging from very coarse sand to silt sand. Particles are also designated by shape as angular, sub-angular, sub-rounded and rounded. Granules, pebbles, cobbles, and boulders are indicated by the range of size in millimeters.

What is Surface comparator for?

A surface profile comparator is a device used to measure the outermost layer profile height of a material. This data is then used to determine the suitability of a particular coating. A protective coating applied to a surface that is too rough is generally less effective against corrosion.

What is a Microfinish comparator?

The S-22 MICROFINISH COMPARATOR Surface Roughness Scale provides industry with established flat surface roughness specimens for visual and tactual comparison. It is used in specifying and controlling surface roughness when a product having the appearance of typically machined surfaces is required.

What does a surface comparator do?