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]
A worn guide sleeve is one of those failures that announces itself through a cascade of other problems before anyone identifies the root cause. The shank adapter starts fracturing at the thread root—engineers blame the adapter manufacturer. Pen...
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The question of which seal material is best has a frustrating but accurate answer: it depends on which failure mode you're trying to avoid. PU (polyurethane) fails through thermal compression set above 90°C. HNBR (hydrogenated nitrile rubber) fai...
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The cost of an incorrect drifter selection in tunnel construction shows up in an accounting line that most procurement processes don't track: overbreak volume per round. A drifter mismatched to the tunnel cross-section, rock formation, or hole depth ...
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Both tools hit rock with hydraulic power. Both mount on excavators. Both appear in specifications under the general category of 'hydraulic rock breaking equipment.' Beyond those surface similarities, a rock drill and a hydraulic breaker are built for...
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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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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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