Rmax Surface Finish Definition

Save

The smooth or rough texture of a surface can be measured and quantified to better regulate its manufacturing process. Rmax is one of many methods available for measuring the roughness of a surface.

Identification

  • Rmax is the measure of maximum roughness. It is the distance, in height, measured from the top of the highest peak to the bottom of the lowest valley of a surface texture. Rmax is measured in either microinches (one-millionth of an inch ) or microns (micrometers, or one-millionth of a meter).

Function

  • Rmax is determined by a profilometer, a hand-held device which measures the physical depth of surface irregularities using a brush or diamond stylus. Since maximum roughness is a measure of the extreme depth, not an average, one deep scratch can greatly affect the Rmax.

Considerations

  • There are other methods of measuring roughness, such as Ra, Rz, Rp, Rq, Rx and Ry, though the most common method is Ra or roughness average. Rmax only measures the vertical component, or height, of the surface texture, though other parameters, such as waviness, hybrid and spacing measure the surface in two and three dimensions.

Related Searches

References

  • Photo Credit texture image by jimcox40 from Fotolia.com
Promoted By Zergnet

Comments

Resources

You May Also Like

  • Definition of RV Classes

    There are various types of recreational vehicles (RVs) made for camping. Some models are suitable for short camping trips, while others provide...

  • What Is Surface RA?

    Surface RA stands for "Roughness Average" and is a parameter used to measure the surface texture of a material. According to the...

  • What Does RMS Stand for in Surface Finish Terms?

    RMS stands for root mean square. This designation is used in determing the roughness of a surface. Often calculated in microinches, manufacturers...

  • How to Measure Tire Rim Size

    Automotive tires have four measurements to consider, while the wheels or rims they sit on have two. Rims are measured in diameter...

  • How to Calculate Marginal Revenue

    Marginal revenue is the revenue a business receives from selling one more unit of a product. Because some production costs are fixed...

  • How to ID Raw Diamonds

    Raw diamonds are uncut and unpolished. In general a raw diamond is what you will see directly from a diamond mine before...

  • How Do I Calculate Scallop Height & Surface Finish?

    Scallop height and surface finish are two measurements that are used for characterizing surfaces, particularly when the surface is created using a...

  • Surface Finish Measurement Tools

    Machinists labor to produce precision parts for a variety of applications. In the production of precision parts, the surface finish of the...

  • Ceiling Texturing Techniques

    Applying texture to ceilings gives depth and definition to the surface. Some popular techniques to achieve a textured finish are knock-down, skip...

Related Searches

Check It Out

22 DIY Ways to Update Your Home on a Small Budget

M
Is DIY in your DNA? Become part of our maker community.
Submit Your Work!