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]
Treating a hydraulic rock drill's sealing system as a collection of individual O-rings to be replaced when they leak misses the point architecturally. The sealing system in a percussion drifter has a structure—dynamic seals in the percussion bo...
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Mining drilling and tunnel drilling use hydraulically similar equipment but place it in operating environments that differ fundamentally—and those environmental differences cascade into every maintenance and selection decision. In surface minin...
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Epiroc, Sandvik, and Furukawa share something most equipment manufacturers don't: all three grew their percussion drilling technology inside operating mines before they sold it to others. Epiroc's lineage runs through Atlas Copco's rock drilling work...
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Every hydraulic rock drill spec sheet lists three numbers prominently: impact energy in joules, impact frequency in hertz, and required oil flow in liters per minute. What the spec sheet doesn't explain is that these three numbers are coupled through...
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The intuition that a bigger drill on a bigger excavator always means more productivity is wrong in a specific and costly way. An oversized drill attachment draws more hydraulic flow than the carrier's auxiliary circuit was designed to supply, forcing...
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Hydraulic rock drills have two distinct lubrication systems that are frequently confused with each other, and maintaining only one while neglecting the other is a common source of premature drifter failure. The first is the hydraulic circuit itself&m...
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Check valves—one-way valves that allow flow in a single direction and prevent backflow—sit in several positions within a hydraulic rock drill circuit. They protect the accumulator gas circuit from oil backflow contamination, prevent retur...
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Most maintenance programs on hydraulic rock drills have a specific interval for hydraulic oil changes, a specific interval for seal kit replacement, and almost nothing written down for accumulator maintenance. The accumulator gets checked when someth...
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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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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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