Wilson^® Calibration Laboratory

Instron^®'s Wilson Calibration Lab includes full capabilities for the calibration of all Wilson hardness instruments. This lab provides the foundation of Wilson Rockwell^® test blocks and represents the best hardness measuring capability in North America outside of NIST.

Rockwell Test Blocks and Calibration Sets

Standard Rockwell test blocks provide an easy means of checking your tester's accuracy at any time, and periodic use on a regular basis is recommended for all models. Comparing a test reading of the block with the hardness number on the test block will indicate whether or not the instrument needs attention. Providing the standards of the industry, Rockwell test blocks are manufactured and calibrated with extreme care. Finished on the latest precision lapping equipment, Rockwell test blocks have a surface height rating of less than five micro-inches (CLA) and both test and supporting surfaces are flat and parallel prior to being calibrated.

Rockwell testers used in the Wilson Standards Laboratory for test block calibration conform to exacting requirements for both minor and major loads as well as for the depth measuring system. Load and depth measurements are traceable to the National Institute of Standards and Technology (NIST). Zero tolerance Brale^® penetrators and master blocks checked to historical Rockwell standards are used in constant monitoring of the calibration process. Test blocks are available in various hardness ranges. When ordering, specify hardness range and scale approximately the same as the work you will be testing.

Calibration Sets

For the most exacting requirements (including SPC inherent variability studies), Rockwell calibration sets consisting of two or three test blocks and matched penetrator, all calibrated to a high degree of uniformity, are available. Calibration sets provide a higher standard to rely on when there is a question of the condition of a test block or penetrator that has been used. Calibration sets are available for all Rockwell scales.

ASTM Standards for Verifying Hardness Machines

E-10 Standard Test Method for Brinell Hardness of Metallic Material

E-18 Standard Test Method for Rockwell Hardness and Rockwell Superficial Hardness of Metallic Material

E-92 Standard Test Method for Vickers Hardness of Metallic Material 1 Kgf to 120 Kgf

E-103 Rapid Indentation Hardness Testing of Metallic Material

E-110 Indentation Hardness of Metallic Material by Portable Hardness Testers

E-384 Standard Test Method for Microhardness of Materials 1 gf to 1 Kgf

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