Surface and form

Surface roughness tester (stylus type)Surface roughness tester (stylus type)

Also called: roughness meter, Surftest (Mitutoyo product name)

≡Standards, measuring range and accuracy

Standard

JIS B 0651 (ISO 3274) Nominal characteristics of contact (stylus) instruments
JIS B 0601:2013 Surface texture: terms, definitions and parameters
JIS B 0633 / B 0634 Assessment procedure and filters

^[1][2][3]

Measuring range

—Not confirmed in public sources

Resolution / graduation

Stylus Tip radius 2, 5, 10 µm, cone angle 60° or 90° (60° unless otherwise specified). Static measuring force 0.75 mN

^[2][3][5][6]

Accuracy (instrument error / maximum permissible error)

—Not confirmed in public sources

▦Types

Portable type (built-in battery) / benchtop (stationary) type

^[4][5]1 source, for reference

With skid / without skid

^[5][3]1 source, for reference

◎Part names and functions

#	Name	English	Function
1	Detector (pickup) / stylus	Detector, stylus	Traces the surface with the stylus and detects its vertical motion.^[5][3][6]
2	Drive unit / display unit / printer	Drive unit, display, printer	^[5]

◷How to read the scale

Displays parameters such as Ra and Rz. See the roughness database for details^[2][5]

✋Usage steps

Choose an instrument that can measure the parameter specified on the drawing (Ra, etc.), and use the combination of cutoff value λc and stylus tip radius that the standard specifies^[2][5][3]

Printed from Kezuriba (kezuriba.net/en/gauges/surface-roughness-tester/)

✓Care, storage, inspection and calibration

Care and storage

Inspection and calibration

Check with calibration reference specimens and step specimens (overview only)^[6][5]

Link it to Kezuriba's roughness DB (research/roughness).

⇄Related instruments

Coordinate measuring machine (CMM)

📚Sources

Content without a mark is what agreed across two or more sources from different publishers. Procedures and cautions are summarized in Kezuriba's own words based on the sources, and the diagrams were drawn by Kezuriba. Accuracy values are manufacturers' published figures, not values from JIS tables.