United Testing Systems (UTS)

The United Model LCH Speedy Tester is a portable, hydraulic testing machine incorporating a highly accurate, built-in digital information system for the display of test data.

The “Speedy” is ideal for testing applications where putting expensive lab or R&D equipment on the factory floor may not be feasible.

United’s DFM-150kN test frame is ideal for testing samples up to 150 kN. (33,700 lbf.). From basic tension and compression testing to advanced materials testing the DFM-150kN is a versatile test system used across virtually all industries.

Floor model systems are designed to sit on lab or production floors due to their increased size and weight. We offer both servo-electric floor model systems and servo-hydraulic floor model systems. For information on our servo-hydraulic systems, please return to the product menu and select one of the DHFM systems.

United’s DFM-600kN test frame is ideal for testing samples up to 600 kN. (134,800 lbf.). From basic tension and compression testing to advanced materials testing the DFM-600kN is a versatile test system used across virtually all industries.

Floor model systems are designed to sit on lab or production floors due to their increased size and weight. We offer both servo-electric floor model systems and servo-hydraulic floor model systems. For information on our servo-hydraulic systems, please return to the product menu and select one of the DHFM systems.

United servo-hydraulic controlled DHFM Series Test Systems are available in capacities from 300 kN. to 2,000 kN.

The fully-accessorized DHFM Series Testers include a complement of support hardware and accessories to immediately commence testing for tensile or compressive strength as well as bend and flex testing. By incorporating proven hardware plus USB-connectivity for high speed data acquisition and control, the SHFM Series takes full advantage of our extensive library of Windows®-based test methods. These test methods generate test results that are fully compliant with internationally recognized standards such as ASTM, ISO, EN, JIS, DIN and BS.

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.