Tinius Olsen Tensile grips are used for uni-axial material testing where a sample is pulled apart from two ends. 

There are many variations of tensile grips for universal testing machines based on the force capacity of the procedure and the specific type of material and geometry.

Many of these fixtures can use different types of inserts which can help to secure the sample. Selecting the right combination of grip and jaw inserts is critical to the success of any tensile testing application.

Low Force Tensile grips are used for testing the materials which require lower forces to be pulled apart.

• Bollard Grips are used on a UTM to perform tensile tests on filament material such as string, thread, wire and yarn. The specimen is wrapped around a bollard or post and then secured with a vise grip mechanism.
• Dumbbell grips for holding thick rigid dumbbells, typically cut from a section of gas and water pipe.
• Pneumatic grips use air to actuate the grip jaws and provide a constant and repeatable lateral force on the sample specimen. These setups are ideal for production environments with high testing throughput requirements. Applications: for example flexible sheet materials, paper, film and polymers.
• Self-tightening wedge grips with spring-loaded wedges to provide the initial gripping and allow rapid loading of the sample. Recommended for gripping relatively soft materials in parallel or dumbbell form. Typical materials include copper, semi-rigid plastics, film, board, wood etc. Ideally the overall sample length should be greater than 150 mm.
• The vise grips from Tinius Olsen have a special mechanism that allows them to strengthen the gripping force during a tensile test. The grip faces will slightly pivot as the tensile force increases. Applications: Sheet materials, paper, plastic films, medical and packaging components.
• Suspended tensile grips designed for testing fabric, webbing, strapping and similar flexible flat materials.