Safety and Load Capacity in Focus

In fastening technology, the precise design and specification of screws is critical to the safety and reliability of entire constructions. At Korrodin, we therefore deliberately push screws to their limits. In our breaking torque tests, we determine the maximum torsional load a screw can withstand before it breaks. This provides a reliable basis for safe, long-lasting bolted joints.

What Does Breaking Torque Tell Us?

Breaking torque is the maximum torque a screw can withstand under controlled loading before it breaks. During the test, the torque is continuously increased until the screw is loaded to its structural limit. The peak torque measured immediately before the screw breaks serves as a key indicator of the screw’s strength and load-bearing capacity.

In addition to the measured value, the fracture pattern also provides important information about the material and manufacturing quality. A clean torsional fracture indicates that the screw has been properly designed for the material. By contrast, a fracture in the threaded section can indicate weaknesses in the design or manufacturing process.

Standardized Testing for Maximum Safety

The tests are performed under specific, reproducible conditions to ensure the results are objective and comparable. The screw is secured in a test fixture, the torque is increased in a controlled manner, and the load curve is carefully documented. This makes it possible to determine the breaking torque precisely and draw conclusions about the screw’s mechanical load capacity and compliance with relevant standards.

Why Are Breaking Torque Tests Important?

The tests show whether a screw has sufficient strength while maintaining the necessary toughness. They help prevent premature failure during tightening or operation and give engineers and designers confidence when selecting and designing bolted joints. These parameters are indispensable for safety-critical applications.

Conclusion

Breaking torque tests are more than simple load tests. They provide precise values for strength and load-bearing capacity, offer insight into material and manufacturing quality, and play a key role in ensuring that bolted joints perform safely and reliably for many years to come.