ZHR Rockwell hardness tester

Unique accessibility

The various hardness testers in the Rockwell product group are used for classical Rockwell methods (load 60 - 150 kg), superficial Rockwell methods (load 15 - 45 kg) and Rockwell/superficial Rockwell combinations (load 15 - 150 kg).
Rockwell ZHR hardness tester for testing a gear wheel

Key advantages and features

Advantages and features

  • Nose-mounted indenter enables testing at difficult-to-access measurement points.
  • Separate indenter, for extended range of application.
  • Fully automatic test sequence (including automatic evaluation) eliminates operator influence on test results.
  • High test-result reproducibility.
  • Rugged construction with zero-backlash, ball-bearing-mounted lead-screw.
  • Test-area height up to 250 mm enables testing of larger workpieces.
  • Visual and audible signals when specified tolerances exceeded and during pre-load setting.
  • Comprehensive equipment included in delivery.
  • RS232C interface as standard.
  • Special specimen holders/grips to suit individual customer requirements.

Range of application

  • The hardness testers in the ZHR product group cover the following methods.
  • Classical Rockwell methods (ZHR4150)
    as per ISO 6508 and ASTM E18.
    pre-load: 10 kg. test load: 60, 100, 150 kg
    scales: A B C D E F G H K L M P R S V.
  • Superficial Rockwell (ZHR4045)
    as per ISO 6508 and ASTM E18
    pre-load: 3 kg. test load: 15, 30, 45 kg
    scales: N T W X Y.
  • Universal Rockwell (ZHR8150)
    as per ISO 6508 and ASTM E18.
    pre-load: 3, 10 kg. test load: 15, 30, 45, 60, 100, 150 kg.
    scales: A B C D E F G H K L M N P R S T V W X Y.
  • Rockwell for plastics (LKP)
    as per ISO 2039-2 and ASTM D785 (A & B).

Technical data for basic instruments

Loading control (load, dwell, unload)

automatic

Resolution, min.

0.1 units (e. g. 62.1 HRC)

Pre-load setting

with visual and audible aids

Test sequence start

manual or automatic

Test area, standard (H x D)

250 x 150

mm

Dimensions (H x W x D)

800 x 260 x 670

mm

Approx. weight

90

kg

Power supply voltage

120 or 240

V

Power supply frequency

50 to 60

Hz

  • Included in delivery:
  • 1 diamond indenter
  • 1x 1/16'' ball indenter
  • 1 support table, Ø 70 mm
  • 1 user manual
  • 1 UKAS test certificate

Features

Features

AK

BK

LK

SK

TK

Data processing

Mean value (display)

Mean value and variance (graphic)

Test series data file

Histogram (display + print)

Capability indices (display + print)

Standard deviation (display + print)

Good/bad evaluation (display and print)

Automatic display of selected hardness method

Automatic conversion (Vickers, Brinell, Rockwell, Knoop, tensile strength)

Automatic curvature correction (Ø = 3 to 20 mm)

Minimum thickness monitoring

Automatic load change

Programmable dwell time (1 to 50 sec.)

Single RS232C port

Twin RS232C ports

Internal clock

Holding-down clamp (factory-fitted option)

Motorized lead-screw (factory-fitted option)

Image-Article
The modular 'building block' system of these Rockwell hardness testers features different equipment versions and enables optimum instrument configuration for the application concerned.
180991

ZHRauto

Automated testing system for Rockwell and superficial Rockwell test methods to EN ISO 6508 and ASTM E18, incorporating an automated sample feeding system for testing up to 36 samples. Shape and size of samples can vary to suit customer specific requirements.

  • The hardness testers in the ZHR product group cover the following methods:
  • Classical Rockwell methods (ZHR4150)
    as per ISO 6508 and ASTM E18
    pre-load: 10 kg. test load: 60, 100, 150 kg
    scales: A B C D E F G H K L M P R S V
  • Super Rockwell (ZHR4045)
    as per ISO 6508 and ASTM E18
    pre-load: 3 kg. test load: 15, 30, 45 kg
    scales: N T W X Y
  • Universal Rockwell (ZHR8150)
    as per ISO 6508 and ASTM E18
    pre-load: 3, 10 kg. test load: 15, 30, 45, 60, 100, 150 kg
    scales: A B C D E F G H K L M N P R S T V W X Y
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