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’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.

Use these pumps for a wide range of laboratory and process applications that require low ultimate vacuum at medium gas flow rate. Vacubrand™ PC 3/RZ 2.5 Rotary Vane Pumps are compact, user-friendly, and well-arranged, with oil mist filter at the outlet, a valve and a T-connection for a gauge.

Fully automatic distillation and titration for Kjeldahl protein determination, Non-Protein Nitrogen (NPN), volatiles and more. Connection to autosampler for high sample throughput, maximum flexibility and unattended operation.

New standards for safety, efficiency, and ease of use. Superior performances and versatile heating magnetic stirrers are suitable for a great variety of applications when mixing and heating are required.

Round-top, square-top, single, and multi-position, these solutions are the best instrument to fulfill any lab requirement, from basic applications to cloud-controlled thermoregulation.

VELP Scientifica offers a wide portfolio of Overhead Stirrers to address your requirement in terms of Viscosity and Volumes.

All VELP Overhead Stirrers have a 3-year Warranty.

VELP Scientifica has developed a wide range of vortex mixers suitable for mixing substances in any shape or size of test-tube thanks to the orbital movement of the rubber cup and many accessories/attachments.