Your supplier of high pressure laboratory instruments

Your supplier of high pressure laboratory instruments

ITB-250 Indirect tension brazilian fixture

ASTM D3967 and ISRM suggested method


The ITB-250 is specifically engineered to evaluate tensile strength through the application of uniform diametrical line compression on cylindrical test specimens. When subjected to vertical compression between two precision-machined cylindrical seating loading jaws, the specimen experiences induced indirect tensile stress along with a consequent orthogonal deformation. This testing assembly, also commonly referred to as the Brazilian test apparatus, is designed for seamless integration into standardized load frames. The system is comprised of three primary components: a specialized indirect tension fixture for specimen positioning, a calibrated load cell for force measurement, and a dedicated software module optimized for indirect tension test analytics. Collectively, these elements ensure high-precision and reliable data collection for the determination of tensile strength variables.



ASTM D3967 and ISRM suggested method

Specimen diameter

Standard version:  up to 76.2 mm (3.0 inches)

Extended version: up to 150 mm (6.0 inches)

Specimen thickness

Between 0.2 to 0.75 x the specimen diameter


High grade stainless steel

Rated force capacity

250 kN


Assured excellent alignment between the fixture and the specimen

Easy installation of removal from the load frame

Hardened specimen end caps for testing strong rock

Versatile, allows multiple specimen diameter to be tested using the same fixture

Video presentation:


Une réalisation