Surface roughness spicement set 30pcs

Surface roughness spicement set contains 30 roughness samples and serves for visual comparison of the surface roughness for samples of turning, planing, face and cylindrical milling, face and cylindrical grinding, polishing.
The roughness samples in the set are quite compact and packed in a leather case. Roughness samples are a rather crude control tool. For more accurate control, it is recommended to use profilometers.
The ОШ-30 surface roughness control kit undergoes metrological control in the ISO 17025 accredited metrological laboratory MICROTECH