The Ultimate Guide to the Universal Testing Machine (UTM).

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.

When choosing a universal testing machine, the WBE advantage provides peace of mind and a superior return on investment. Our commitment to precision is evident in our high-stiffness frames and high-accuracy load cells, ensuring the data you collect is always reliable. The durability of our machines is a result of our nearly 30 years of manufacturing experience and our use of high-quality industrial components, guaranteeing a long service life even in demanding environments. Finally, our comprehensive support, from expert consultation before the sale to our full life-cycle service plans after installation, means we are not just a vendor but a true partner in your success. This combination of precision, durability, and support is why global leaders trust WBE for their most critical material testing needs and why a WBE universal testing machine is the right choice for your lab.

The grips and fixtures are the critical interface between the universal testing machine and the specimen being tested. Using the correct type is essential for obtaining accurate results. The primary goal is to hold the specimen securely without causing it to slip or fail at the gripping point, which would invalidate the test. Grips, used for tensile tests, come in many forms, such as wedge grips for metals that tighten as force is applied, or pneumatic grips that provide constant pressure for softer materials. Fixtures are used for other tests; for example, compression platens must be large, flat, and parallel, while a three-point bend fixture must have precisely spaced, smooth supports. An investment in high-quality, appropriate grips and fixtures is just as important as the universal testing machine itself for ensuring data integrity.

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.