Actualités
Nouveaux duromètres Rockwell
Mechanical, Semi-automatic and Digital Versions
Five New Rockwell
Hardness Testers
Mitutoyo, the manufacturers of measuring systems,
expand their hardness tester product range. All at once, the cur-rent generation of the HR series includes five new versions.
The new models conform to DIN EN ISO 6508-2, JIS B7726 and ASTM E 18. Depending on their design, they enable measurements according to Rockwell/Rockwell scale N, T, and optionally also Brinell.
Two analogue and three digital models are available at the launch of the HR generation introduced now.
The analogue basic model HR-110MR of the new series is completely mechanical, with the preliminary test force being applied by means of a spider. Load, duration and disengagement of the additional test force is manually regulated through a hand lever, whereas in the second analogue version, HR-210MR, the rest of the process following the manual application of the preliminary test force is carried out au-tomatically.
Control of the testing process is also automatic in the digital versions HR-320MS, HR-430MS and HR-430MR. The top-of-the-line models 430MS and 430MR additionally comprise an auto-brake function for the preliminary test force as standard. Moreover, they allow for very comfortable adjustment of the testing forces of the various Rockwell processes by means of a dial knob.
The functional capabilities of the digital versions also include, among other things, a GO/NO GO tolerance evaluation as well as an option for converting the measured values into other hardness scales. In addition to the RS232C interface, the digital models are equipped with Mitutoyo's well-known Digimatic data output.
Interesting for cost-conscious users: Mitutoyo offer the option of equipping all of the series' devices with a retrofit kit for Brinell meas-urements.
While the test impression is carried out by the hardness tester, the subsequent measurement is performed by means of an external opti-cal system, such as a profile projector or measuring microscope.
An economically viable solution, because users frequently use such optical measuring devices for other applications anyway. An additional optical system on the hardness tester would only be an unnecessary cost factor in those cases.