Customizing a UTM for Your Specific Industry Needs.

The main difference between a single-column and a dual-column universal testing machine lies in the construction of the load frame, which directly impacts its force capacity and rigidity. A single-column UTM, as its name implies, has a single vertical column supporting the moving crosshead. This design is more compact, making it ideal for benchtops and labs with limited space. It is typically used for lower-force applications (generally below 10 kN), such as testing films, textiles, plastics, elastomers, and medical devices. A dual-column UTM has two vertical support columns, creating a much more rigid frame. This increased rigidity is necessary to handle higher forces without the frame itself deflecting, which would compromise test accuracy. Dual-column machines are used for higher-force testing of materials like metals, composites, and construction components.

A universal testing machine (UTM) is a foundational piece of equipment in materials science and quality control. Its primary job is to determine the mechanical properties of materials and components by applying a controlled force. The machine's powerful drive system moves a crosshead up or down at a precise speed. This movement applies a force to a specimen that is held in place by specialized grips or fixtures. A highly accurate sensor called a load cell measures the applied force, while an extensometer or the crosshead position measures the specimen's deformation or stretch. This data is plotted on a graph, typically a stress-strain curve, from which critical properties like strength, stiffness, and ductility are determined. Its "universal" capability allows it to perform various tests, such as pulling (tensile), pushing (compression), and bending (flexural).

To ensure the ongoing accuracy and reliability of your universal testing machine, a regular schedule of calibration and maintenance is essential. Calibration is the process of verifying the machine's measurement systems (force, displacement, and strain) against a traceable reference standard. This is typically done annually by an accredited service technician and is crucial for maintaining quality certifications and data integrity. Maintenance involves routine checks and servicing of the machine's mechanical and electrical systems. This includes inspecting drive belts, lubricating lead screws, checking for worn grips, and ensuring all safety features are functioning correctly. A proactive approach to calibration and maintenance, like the service plans offered by WBE for our universal testing machine lineup, is the best way to protect your investment and ensure consistent, trustworthy test results.

Selecting the correct force capacity is the most critical decision when purchasing a universal testing machine. The capacity is the maximum force the machine can safely apply. To determine your required capacity, you must first identify all the materials you plan to test and find their estimated ultimate strengths. Your machine's capacity must be greater than the breaking force of your strongest material. However, it is also important not to oversize the machine excessively. The load cell, which measures the force, is most accurate in the middle of its range. If you are consistently testing very low-force samples on a very high-capacity machine, your accuracy may be compromised. In many cases, it is best to purchase a universal testing machine with a capacity for your strongest materials and then buy an additional, lower-range load cell that can be easily swapped in for more sensitive tests.