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UTS - TB II Rockwell Hardness Tester

United’s Tru-Blue II is an all scale computer-controlled Rockwell hardness tester utilizing a precision load cell for accurate force measurement. Tough, durable and easy to use. Removable clamping device allows for supporting odd shaped and large heavy parts.

What is Rockwell Hardness Testing?

The Rockwell Hardness Test is generally a non-destructive test performed on samples when it is necessary to determine how hard a material is.  Hugh M. Rockwell (1890–1957) and Stanley P. Rockwell (1886–1940) from Connecticut co-invented the first tester and a patent was granted in 1919. The Rockwell Hardness test is generally considered easier to perform compared to other methods such as Vickers or Brinell.

Hardness is defined as a material’s resistance to permanent indentation. Current Rockwell Hardness test methods are specified in ASTM E-18 and anyone wishing to perform a Rockwell Hardness test should become familiar with this test standard.

Rockwell Hardness Test Procedure

The Rockwell hardness test consists of indenting the test material with a diamond cone or hardened steel ball indenter. Each time a test is performed two loads are applied to the sample being tested. First, the indenter is forced into the test material under a preliminary minor load and this depth is recorded. With the minor load still applied an additional load is introduced known as the major load which increases the depth of penetration on the sample. The Major load is then removed, and the force on the sample is returned to the minor load. The increase in the depth of penetration that results from applying and removing the major load is used to calculate the Rockwell hardness value.

Technical specifications

Vertical Capacities 10 in. (25.4 cm)
14 in. (35.6 cm)
18 in. (45.7cm)
24 in. (60.9 cm)
Throat Depth 5.5” (14 cm)
9.5” (24 cm)
Rockwell Scale Forces 10 Kg
60 Kg
100 Kg
150 Kg
Superficial Scales 3 Kg
15 Kg
30 Kg
45 Kg

Key features

  • Automatic cylindrical part correction
  • Scale to scale conversion
  • Parts GOOD/NO GOOD w/ audio alert
  • Connector for test activation by foot switch
  • Bi-directional testing capability; manual pre-load or via panel
  • Removable parts clamping device to secure parts for testing and to reduce operator influence
  • Factory direct certification: Depth, force, hysteresis & dwell timing vs. force.
  • Factory indirect certification available. Requires customer indenter(s) and flat anvil

TB II Rockwell Hardness Tester

  • Education & Academics
  • Food & Beverage
  • Mining & Minerals
  • Oil & Gas
  • Polymers, Plastics and Rubbers
United Testing Systems (UTS)United pioneered the first automatic data acquisition and reduction system to be used in conjunction with physical testing. United developed the first fully automatic test system able to test several samples in sequence without operator involvement. These breakthroughs have earned the United organization an enviable reputation as the “Pioneers in Tensile Data Acquisition.”
[hardness tester, strength tester, hardness testing instrument]