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JFE ADVANTECH SONOHARD SH-21A-E2 Portable Metal Hardness Tester
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The Handy Hardness Tester model SH-21 differs completely from traditional hardness testers. Instead of measuring the size of the indentation of the test sample using a microscope, it uses a diamond indenter equipped with a vibrating rod that presses on the test surface at a fixed load and then measures its hardness by applying ultrasonic vibrations and analyzing its damping effect.
When the vibration rod is applied to a soft-surfaced test sample with identical qualities and at a fixed force, it makes a deep indentation and gets locked into the groove. Due to this, the resonance frequency increases. Conversely, it does not get locked in when used on hard test samples and the resonance frequency drops. The test sample' s hardness can be calculated using the correlation between this deviation and the tested hardness.
The SH21 is very easy to use and requires no special knowledge of hardness testing in order to operate the instrument. The unit includes all four hardness scales and you can switch between them at the touch of a button.
Applications
Evaluation of carburizing, standard quenching and high-frequency quenching
Weld hardness measurement for welded structures ( tanks, hulls, bridges, steel towers , etc.)
Hardness measurement for a gear tooth flank ( narrow area)
Measurement of structural strength or hardness of a facility
100% online inspection for components ( engine valves, rack bars, crankshafts, bearings, etc.)
Specifications
Measuring Indenter Diamond indenter for Micro-Vickers ( facing-to-surface angle of 136 deg)
Measuring load Approx 1kgf ( roughly 10N)
Approx 2kgf ( roughly 20N)
Approx 4kgf ( roughly 40N)
( These loads indicate those in typical applications. As the specification varies according to the object to be measured, please contact us for details.)
Measuring range Rockwell hardness: HRC10.0 to HRC70.0
Vickers hardness: HV100 to HV999
Shore hardness: HS20.0 to HS99.9
Brinell hardness: HB85 to HB550
Reproducibility HRC: ± 1.0HRC , HV : ± ( 3% rdg) HV , HS: ± 1.0HS , HB : ± ( 3% rdg) HB
Power source AC adapter ( 100 to 240V) or lithium ion rechargeable battery
Minimum target size 15 mm ( width) x 15 mm ( length) x 7 mm ( thickness)
Supplied as a complete kit including: 1 display unit, 1 probe (including standard attachment/UA5410), 1 hardness standard test block (arround 55HRC), 1 probe cable 1.5m, 1 AC adapter 100～240V (A10WN-09010Ｉ), 1 recharger (MK-8220), 1 lithium ion battery (MK-8401),1 carrying case (MK-9701), 1 instruction manual, 1 inspection sheet.