Rockwell hardness testers are a vital tool for a wide variety of industrial and commercial applications, especially those involving metal. These instruments determine the stiffness or strength of a material by measuring the depth of an indentation made by a harder tool against the surface of a sample. Different types of test methods exist, and the best rockwell hardness tester for sale is a machine that can accommodate the specific testing needs of a particular application.
Grainger carries a wide variety of hardness testers, from dependable analog and digital models to advanced load-cell type models capable of testing using the Rockwell, Brinell and Vickers methods. These units can be used on work pieces large enough for a bench top machine or smaller and more portable models designed to be used in the field with minimal destruction of the sample.
We also carry a wide range of metallographic equipment, including microscopes and cross-sectional analyzers that can be used to measure the hardness of materials or identify defects. These are important tools for metallurgical laboratories, quality control departments, and for Captive and Commercial Heat Treaters.
A rockwell hardness tester works by using a diamond indenter to make an impression against the surface of a sample. The hardness of the material is determined by the depth of this indentation, or the diameter of the pyramid that forms on the surface of the sample. In order to obtain the most accurate and reliable results, the diamond indenter should be well centered on the surface of the sample. In addition, the surface of the sample should be smooth and free from imperfections that may cause deformation during testing.
The Rockwell hardness scale is the most popular in the world, determining the hardness of a variety of materials, such as carbon steels, cast irons, non-ferrous metals and engineering plastics. It is based on the fact that hard materials have greater resistance to indentation than soft materials, and the hardness of a material can be directly measured by the depth of penetration of an indenter into the surface of the sample.
This state-of-the-art digital programmable hardness tester features automatic load/unload procedures, programmable scale conversions and dwell times and an automatic counter. It is capable of testing to all regular Rockwell hardness scales as well as the BH, HV and HRC microhardness tests.
This unit has a clean crisp display and a host of functions such as auto probe detection, auto direction detector, single and multi-point calibration. This is the ideal machine for testing large metal parts.