33-99No. Mufu E Rd. Gulou District, Nanjing, China [email protected] | [email protected]
33-99No. Mufu E Rd. Gulou District, Nanjing, China [email protected] | [email protected]
There's a reason experienced drillers talk about 'feel' when they're setting up a new face. Percussion pressure, rotation pressure, and feed force don't operate independently—they're coupled through the drill bit in ways that make adjusting one...
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Talk to a mine maintenance manager who has run both Epiroc and Sandvik equipment on the same site and the conversation rarely stays on spec sheet comparisons for long. It moves quickly to consumables logistics, service interval behavior, and what hap...
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Oil leakage on a hydraulic rock drill is rarely just a nuisance. A weeping flushing box seal means water is entering the percussion circuit in the opposite direction—contaminating the hydraulic oil and gradually scoring the bore surface. A weep...
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A seal kit replacement that fails within the first 50 percussion hours is almost never a parts quality problem. It's an installation error—usually one of three: the bore wasn't flushed before new seals were fitted, a dynamic seal was twisted du...
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When a hydraulic rock drill loses impact power, the first component that gets pulled and replaced on most sites is the hydraulic pump. That's usually the wrong call. The pump generates flow, not pressure—pressure in a hydraulic system is resist...
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Buying a hydraulic rock drill by spec sheet alone usually ends in one of two predictable disappointments. Either the drifter exceeds the carrier's hydraulic capacity and runs at 70% of rated percussion power for its entire service life—quietly ...
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Running a 25 kW heavy-duty drifter on a limestone highway cut that tops out at 100 MPa doesn't improve productivity. It adds capital cost, increases hydraulic flow demand on the carrier, burns more fuel per meter, and wears consumables faster than th...
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Seal failure in a rock drill operating in an aggressive environment rarely starts with visible corrosion on the elastomer surface. It starts with swelling. The seal compound absorbs fluid or vapor from the environment—acidic mine water, emulsif...
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On a fixed-displacement pneumatic system, every liter of air the compressor produces that the drill doesn't use immediately vents through the relief valve and disappears. On an open-loop hydraulic system without load sensing, excess oil flow does the...
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The engineering case for an integrated hydraulic rock drill isn't about fewer parts—it's about fewer joint faces. Every bolted interface between a percussion module and a housing section is a potential leak path, a potential loosening point und...
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The maintenance cost argument for split-body rock drills doesn't come from the marketing sheet—it comes from what happens when something fails inside a conventional monolithic drifter. The percussion module, rotation motor, and flushing box are...
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Rock drilling in a city is not just an engineering problem. It's a permit problem. OSHA's permissible noise exposure for an 8-hour shift sits at 90 dBA at the operator's position—that's a worker protection standard. The adjacent residential bui...
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Welcome to HOVOO, a Chinese seal factory. Production of PU, Rubber and PTFE seals. The seals include O-ring, piston seal, rod seal, Gray ring and gas seal.
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