Achieve a mirror finish through cutting processing! Our company can achieve a surface roughness of Ra 20nm or less with the hands of skilled technicians!
There are various ways to express surface roughness, but most are represented by Ra or Rz. All units are in micrometers (μ). In machining, a typical limit is around Rz3.2. Depending on the orientation of the machined surface, it can be increased further, but for freeform surfaces machined with a ball, this is a good guideline. Beyond this, we enter the realm of polishing and grinding. Even for freeform surfaces, our company can achieve a finish of Ra0.1 through the use of special tools. Going beyond Ra0.1 is a domain that is difficult to achieve with machines. However, thanks to our skilled technicians, we can achieve surface roughness below Ra20nm. When machining a concave spherical surface from a material with a hardness of HRc55, we used CBN tools, but there was a profile difference of about 15μ. This varies depending on the machining conditions, but the ability to perform such shape checks is thanks to the measuring instruments located in our temperature-controlled room. *For more details, please refer to the related links or feel free to contact us.
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basic information
**Representation of Surface Roughness** ■Ra - A value obtained by dividing the area of the surface curve by the measurement length, representing the average roughness. - This standard is used unless otherwise specified. ■Rmax - Represents the maximum height from the highest peak or the lowest valley considered as a defect in the surface curve. - Due to its mechanical processing difficulties, it is used less frequently. ■Rz - Represents the difference in average values between the heights of the top five peaks and the depths of the bottom five valleys in the surface curve. - It is about four times larger than Ra. *For more details, please refer to the related links or feel free to contact us.*
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Since its founding in 1947, we have been dedicated to "monozukuri" (manufacturing), particularly focusing on "capital goods" for 75 years. With the unique experience and technology we have built up, we continue to provide high-quality products that cannot be imitated by other companies, delivered on the requested schedule and at a fair price.