Components of a good bore piling drilling kelly bar

Components of a good bore pile drilling kelly bar? How to evaluate a bore piling kelly bar’s quality? Firstly, the raw material plays the greatest impact. To the materials, as a bore pile drilling tools manufacturer, UNIDRILL bore piling kelly bar factory adopt top quality seamless steel tube from China's leading steel factory. The material of 1st-2nd section is Q345B, the 3rd-5th section is 35CrMo. Features of 35CrMo feature is high static strength( the article is written by Drillmaster [email protected], no one may reprint it, otherwise we will pursue the legal responsibility), impact toughness and high fatigue limit, good wear resisting. Material of kelly bar drive gib is 30CrMnTi hardening ( in China, other suppliers use 20CrMnTi). Why use 30 CrMnTi as the material of kelly bar drive gib, because:

30CrMnTi hardening gib was made by several multiple drawings and heat treatments

High strength, great toughness, with good abrasion-resistance on the surface

Without any cross breaking during bad condition formation.

The matrial of UNIDRILL kelly box is 35CrMoHardening, integrally forged. Forging and forming of high strength steel into a ingegrally unit, with multiple heat-treatment, with high impact and fatigue resistance, that’s also the reason why UNIDRILL bore pile drilling kelly bar is so durable in use.

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