ERNST is a company with over 50 years’ experience
in the research, design and production of high quality metal
The sales program of Ernst includes:
Among all kinds of inspections that are carried
out in a workshop testing of hardness is the most diversified.
Ernst manufactures and distributes different kinds of metal hardness testers, to meet the various testing requirements.
It is possible to move the work piece under the
tester as well as the tester over the work piece. The first case
concerns bench hardness testers, that allow holding and clamping of
the part during testing; bench hardness testers are suitable for
testing of small and medium parts.
Testing on particularly difficult parts should be evaluated from time to time.
The range of bench hardness testers:
NR3 DR / NR3 DSR Rugged and easy-to-use Rockwell / Superficial Rockwell bench hardness testers, with standardized preload and load. Test loads for Brinell testing. Output RS232
AT130 DR / AT130 DSR Bench hardness testers for Rockwell / Superficial Rockwell testing. Standardized preload and test loads. Test loads for Brinell testing. Four different stands available. Output RS232
AT200 DR / AT200 DSR Bench hardness testers,
similar to AT130, with digital readout through microprocessor.
MTR Bench hardness tester ESATEST-series
BRE-AUT Automatic hardness tester for Brinell
testing with variable loads from 500 to 3000 kp.
The range of Ernst portable hardness testers include:
COMPUTEST SC Portable hardness testers with
direct reading of test results on LCD backlit display. Seven or more
hardness scales available. Static testing on flat and cylindrical
surfaces and on different metals.
DYNATEST SC Portable hardness tester similar to
COMPUTEST SC, but with heavy load (more than 100 kp).
HANDY Portable hardness testers ESATEST-series
STE A / STE B Dynamic or static-dynamic portable
hardness testers working with calibrated pins. Test load 1580 kp.
Test results in Brinell scale and tensile strength. In compliance
with the Brinell 30 D² standards.
Metal hardness testers
Almost all ERNST hardness testers are particularly suitable for testing metals, giving the operator the possibility to choose the right hardness scale and the test load according to the test material.
The following table can be a valid aid to choose
the most suitable hardness testers for your purposes:
Rockwell hardness testers
The Rockwell hardness test can be divided into
two groups: Rockwell and Superficial Rockwell.
The ERNST Rockwell hardness testers are designed to take the advantages from the Rockwell test, such as the employ of diamond indenters for testing tempered steel or hard metals, and the ball penetrators for soft metals. The Rockwell method allows testing of plastic even under load.
The ERNST Rockwell hardness testers allow
overcoming some limitations of the Rockwell method.
To overcome this problem, almost our hardness
testers (AT-series, TWIN, BRE-AUT, COMPUTEST SC, DYNATEST SC) work
according to a modification to the Rockwell principle.
The ERNST bench hardness testers have a third
important component, called clamping shield.
Brinell hardness testers
I Brinell hardness testers allow employing heavy
loads in quite simple and rugged structures
Vickers hardness testers
The working principle of Vickers hardness testers
is the same as the Brinell one, but in this case it employs only one
indenter, being a pyramidal diamond with square base.
Some of our hardness testers:
DYNATEST SC Heavy load portable hardness tester Testing load more than 100 k p (98 N) Digital readout in Rockwell and Brinell hardness scales (Vickers and other scales on request) Print functions in 5 languages, statistics, 1000 tests can be stored, RS232 output, backlit display. Performances comparable to a bench tester.
HANDY ESATEST Portable hardness tester Digital readout in Vickers hardness scale (other scales on request) A new concept of hardness tester for testing of odd shaped parts and difficult test points. Possibility of testing flat and cylindrical surfaces, gear evolvents, etc.
COMPUTEST SC Light load portable hardness tester (5 kp). Digital readout in Rockwell, Brinell and Vickers hardness scales (other scales on request). Optional bench stand for testing of small parts. Magnetic support and other equipment available. Print functions in 5 languages statistics, 1000 tests can be stored, RS232 output, backlit display.
STE Ernst Calibrated Pins Tester Portable hardness tester for Brinell testing. Testing load 1580 kp Precise – easy to use – reading of one impression only
NR3 Digital hardness tester, based on the Rockwell test principle with instantaneous readout in Rockwell and Brinell scales (other scales on request). Suitable for testing of small parts and plastic materials.
AT130 Semi-automatic bench hardness tester, based on Rockwell test principle with instantaneous readout in Rockwell and Brinell scales (other scales on request). Overhanging parts can be clamped without any extra support. Four different stands are available for testing large parts. Testing is not influenced by flexions or bending of the work piece.
AT200 Semi-automatic bench hardness tester, digital readout in Rockwell hardness scale and in equivalent Brinell, Vickers and other hardness scales. Sequential application of preload and load. Storing of 4000 hardness values in 64 different files, printing of the test certificate in 5 languages, display of statistics and histogram. Large LCD backlit display, 107x57mm Clamping of overhanging parts without any extra support. Four different stands are available for testing large and irregular parts.
ESATEST MTR A new concept of hardness tester for testing of odd shaped parts and difficult test points, as grooves, holes, involutes, etc. Digital readout in Vickers hardness scale (other scales on request). Motorized test load application. With one test only, it is possible to display the hardness value at different loads from 9.8 to 98 n (1-10 kp) and to notice any anomaly or non-homogeneity of the material. The 16bit microprocessor system allows handling of more than 4000 hardness values.
TWIN Automatic hardness tester motorized. Digital readout in Rockwell and superficial Rockwell scales and in equivalent Brinell, Vickers and other scales. Indenter’s stroke 45mm Max measurable height 420mm Automatic load change Large memory, up to 4000 values can be stored in 64 different files Printing of test certificate in 5 languages, display of statistics and histogram, Centronics and PC output. Unaffected by any deflection of the test piece. Possibility of testing very large and irregular specimens.
AT300 DR-TM AT300 DR-TM is a motorized hardness tester, particularly suitable for high volume testing (approx 1000 pcs/hour), custom in line applications for a completely automatic test process and test part selection. The possibility to motorize also the test head motion permits a considerable reducing of the test time. A very versatile stand permits testing of large parts. The basement of the stand contains a convenient accessory drawer.
BRE-AUT Automatic Brinell hardness tester Test time reduced by 85% in comparison with the traditional Brinell testers. Adapted for completely automatic in-line operation. The 16-bit microprocessor of the electronic console has been designed to guarantee full documentation of the test process, providing a wide range of functions such as: adjustable tolerances, calibration, serialization of readings and lot number, print, statistics, graph, etc. The test certificate can be printed in different languages.