Multi-locking Kelly Bar
As opposed to standard interlocking kelly bars, multi-locking kelly bar can be locked at any point, hence resulting in better flexibility. The unique feature makes it able to transfer the entire constant crowd force to the drilling tool, hence maximizing efficiency and significantly improving the life of the whole kelly bar.
To guarantee long-life and reliability of the product, APFMKB series kelly bars are made of special type steel with high strength. Canister thickness of the outer element and canister length are both increased for the purpose of strengthening and increasing the durability of the tube. All Kelly bars have a warranty of one year or 2000 working hours.