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305mm step drag bits
Selling leads
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...Bit Rock Drill Bits for Rock Drilling Description: CIR130 CIR170 DTH Button Bits for Drilling Hole 1. High and low air pressure down-the-hole ...
2024-12-09 12:11:48
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... Weight (less bit) 487kg (1071lbs) Hole range 305mm-445mm Working pressure 10-25bar Impact rate at 1.7 Mpa 16Hz Recommended rotation speed 15-25 r...
2024-12-09 12:11:40
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...hole wide enough for the casing tube to slide down behind the drill bit assembly. 2. When the required depth is reached, rotation is reversed ...
2024-12-09 12:11:48
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