TEST METHOD - SCREW CONNECTIONS
FRICTION COEFFICIENT TESTING — FROM VERY SMALL TO M80
A pre-tensioned screw connection is not possible without friction. At the same time, the friction coefficient must be as stable as possible to allow for easy assembly and maximum load-bearing capacity.
We test standard screws up to size M5. For even bigger screws, we deploy the world’s largest friction coefficient testing machine for connection technology. Here, screws up to dimension M80 with a pre-tensioning force of 5000 kN are subject to rigorous testing at a total torque of up to 60,000 Nm.
Standardised friction coefficient determination in line with:
- DIN EN ISO 16047
- DIN EN 14399
- VDA 235-203
TORSION TESTING — SPECIAL SCREW TESTING
Our facilities include two vertical torque test benches. These are used to determine the torque and the rotation angle of connection parts. This includes the functional characteristics of screws in relation to:
- Breaking torque
- Screw-in torque
- Rolling torque
- Tightening torque
This technology is also always used if the behavior of a connection element has to be evaluated on a customer’s specific component. This makes us the partner of choice when it comes to application consulting and the joint development of new products.
Standardised torsion testing in line with:
- DIN 7500
- DIN 267-27
- DIN 267-28