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SPM 4 inch High Pressure DTH Air Drill Hammer bit 440 is very popular in international ore drilling field.
It is widely used in international ore drilling field. Drill-the-hold hammer.
SPM 4" DTH Drill Hammer 440 drill holes from 115mm to 130mm.
Matched drilling bits:SPM440-115,SPM440-130.
We also supply other 3",4",5",6",10",12" High Pressure DTH Air Drill Hammers and various matched drill bits,
We offer SPM high air pressure DTH hammer size from 3" to 12"(Φ71mm-Φ275mm), SPM DTH hammers perform good in drilling well of diameter from 85mm to 600mm, especially excellent in deep hole well drilling works.
Different designing makes SPM DTH drill hammers are suitable for various well drilling conditions.