Hardness & Surface Testers

Hardness and surface testers are instruments used to characterize the mechanical properties and surface quality of materials and manufactured parts. Hardness testers measure the resistance of a material to permanent deformation using standardized methods such as Rockwell, Vickers, Brinell, Knoop, and Shore scales. Surface roughness testers (profilometers) quantify the micro-geometric texture of machined or ground surfaces, providing parameters such as Ra, Rz, and Rq that correlate with functional performance, seal integrity, and tribological behavior.

These instruments are used across the full manufacturing cycle — from incoming material inspection to final part acceptance — and in research laboratories studying material behavior under process variations. Portable hardness testers enable in-field testing of large structures, welds, and components that cannot be brought to a bench instrument.

Typical Applications

Heat treatment verification of steel and aluminum alloys in metals processing
Surface roughness measurement of ground, honed, and turned components for functional validation
Incoming inspection of raw materials and bar stock in precision machining shops
Weld quality verification and post-weld heat treatment assessment in structural fabrication
Rubber and plastic hardness testing (Shore A/D) in polymer and sealing component production
Bearing and gear surface finish characterization to ensure correct tribological performance

Popular Brands

Mitutoyo provides both bench and portable hardness testers along with the SJ-series surface roughness testers widely used in machining and metrology. Starrett offers field-proven portable hardness testers. Wilson (Buehler) and Zwick Roell are recognized for laboratory-grade hardness testing machines, while Mahr and Taylor Hobson are specialists in high-precision surface texture measurement.