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Shore Hardness Tester
Digital Shore Hardness Tester

Shore Hardness Tester

Model: UT2051, ISO 868, ISO 7619

Shore Hardness tester / durometer (rubber durometer) is widely used for measuring the hardness of rubber and plastics. It features a simple structure, ease of use, compact size, light weight, and intuitive reading. It can be carried for handheld measurement or installed on a matching production fixed-load stand of the same model for fixed-load testing. The product is manufactured with reference to ISO 868 and ISO 7619. 

General Introduction

Shore Hardness tester / durometer (rubber durometer) is widely used for measuring the hardness of rubber and plastics. It features a simple structure, ease of use, compact size, light weight, and intuitive reading. It can be carried for handheld measurement or installed on a matching production fixed-load stand of the same model for fixed-load testing.


Product Standards and Scope of Use:

1. The product is manufactured with reference to ISO 868 and ISO 7619 international standards and complies with GB/T531, JB6148, and JJG304 standards.

2. Shore A hardness tester is widely used for hardness testing of medium and low hardness plastics, various rubbers, polyesters, leather, wax, and other materials.

3. Shore C hardness tester is suitable for testing the hardness of microcellular plastic materials containing foaming agents, with a compression stress of 0.5 kg/cm² or more at 50% compression. It can also be used for hardness testing of other materials with similar hardness.

4. Shore D hardness tester for hardness testing of high-hardness materials such as hard rubber, hard resin, acrylic, organic glass, thermoplastic plastics, printed circuit boards, fibers, etc.

Shore Hardness Tester

                     Shore Hardness Reference Blocks

Key Features

  • Principle
  • Classification
  • Standard

A steel indenter of a certain shape is pressed vertically into the surface of the specimen under the action of a test force. When the surface of the indenter is completely in contact with the specimen surface, the tip of the indenter protrudes a certain length L relative to the indenter base plane. The value of L is used to characterize the Shore hardness. The larger the L value, the lower the Shore hardness; conversely, the smaller the L value, the higher the Shore hardness. The calculation formulas are:
HA = 100 - L/0.025
HD = 100 - L/0.025
HC = 100 - L/0.025
Shore Hardness Tester

Where HA is the Shore A hardness. As shown by the formulas, Shore A hardness is related to the indenter displacement. By measuring the indenter displacement, the Shore A hardness value can be calculated. 


Shore hardness testers are mainly divided into three types: A, C, and D. 

Their measurement principles are exactly the same, with the only difference being the size of the indenter. The A-type has a tip diameter of 0.79 mm; the Shore A hardness tester is used to measure soft plastics, rubber, synthetic rubber, felt, and leather. The D-type has a tip diameter of 0.2 mm, i.e., a radius of R0.1. The Shore D hardness tester is used to measure the hardness of hard plastics and hard rubber, such as flooring materials, bowling balls, and other on-site hardness measurements. The C-type indenter is a spherical tip with a diameter of 5 mm. The Shore C hardness tester is used to measure soft materials like foam and sponge.

ISO 868 

ISO 7619

GB/T531, 

JB6148, and JJG304

Main Technical Specification

ModelUT2051AUT2051CUT2051D
Measuring range0-100HA0-100HC0-100HD
ToleranceWithin 10-90 degrees, the error is less than ±1 degree.
Resolution1 degree
Press needle stroke2.5mm
Press needle pressure0.55N-8.05N0.55N-8.05N0-44.5N
Press needle head sizeФ 0.79 mmSR2.5mmSR0.1MM
Size115×60×25mm
Weight160g
Optional partTest stand bracket.


ModelUT2051SAUT2051SCUT2051SD
Measuring range0-100HA0-100HC0-100HD
ToleranceWithin 10-90 degrees, the error is less than ±1 degree.
Resolution1 degree
Press needle stroke2.5mm
Press needle pressure0.55N-8.05N0.55N-8.05N0-44.5N
Press needle head sizeФ 0.79 mmSR2.5mmSR0.1MM
Size115×60×25mm
Weight160g
Optional partTest stand bracket.


Shore Hardness Tester Stand

The hardness tester stand is a new generation of Shore hardness tester stands developed by our company. It uses high-quality black marble as the base and high-strength delicate tempered glass as the testing platform, greatly improving testing stability and making measurement results more accurate. The stand has a reasonable structure and an attractive appearance. 


AC model is compatible with A and C type Shore hardness testers, D model is compatible with D type hardness testers.

Shore Hardness TesterShore Hardness Tester
Shore A C hardness tester standShore D hardness tester stand


Shore A C D Hardness Tester Comparison Table

Shore Hardness D    Shore Hardness C    Shore Hardness A    Types of Polymers   
90

Hard plastic
86


83


80

Medium hardness plastic   
77


74


70


6595

609398
558996Soft plastic
508094
427090
386586
355785
305080
254375
203670
152760Rubber
122150
101840
81530
6.51120
4810


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Beijing United Test Co., Ltd.