The specimen placed within the furnace of the testing machine is subjected to a constant tensile load, whereby the extension undergone by the test piece due to the heatingup is recorded as a function of the time. The specimen is introduced into the machine in a vertical position
and is gripped at both ends by means of specimen holders (adapters). The upper pull-rod is fixed to the lever where from one end of the lever arm the loading shackle is suspended to the dead weights.

The lever ratio being 1:25. The nulling (zeroing) of the load train mass is provided by adjustable counter balance. The lever arm includes hardened vee-block design providing low stress and minimum deflection, resulting in a maximum linear knife edge contact with four-position knife edge for easy rotation and replacement of worn edges. The rotatable knife edge with 4 balancing edges provides 4 times the live. The lower end of the loading shackle is provided with an damper in order to prevent the shackle with the weights from being dropped abruptly at fracture of the specimen. Shocks which could be transmitted to the vicinity of the creep tester are therefore completely absorbed. The machine is equipped with upper elastic hinge and adapters with spherical seat to accommodate the pull-rods for optimized alignment according to ASTM E292 and other international standards.