🌐 Global Continuous Spare Parts Supply: Direct Delivery to Your Desired Destination.
MERIT keeps your heavy machinery moving with a streamlined global dispatch network designed to cut downtime to zero. We deliver high-end hydraulic components directly to project sites, repair shops, and distributors across our primary international corridors:
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- Australia & Oceania: Rapid delivery solutions straight to major mining regions (WA, Queensland, NSW), civil engineering projects, and heavy equipment hire fleets.
- The Arabian Peninsula: Supply of climate-resilient sealing components across the entire GCC, covering the UAE (Dubai, Abu Dhabi), Saudi Arabia (Riyadh, Jeddah, NEOM sites), Oman, Qatar, Kuwait, and Bahrain.
- Russia & CIS Regions: Direct channel shipping to industrial operations, mining facilities, and centralized machinery warehouses throughout Russia and neighboring CIS zones.
- Global Heavy Hubs (Europe, Africa, The Americas): Our boundless shipping network spans the globe, reaching major plant hire fleets and tier-one mining projects everywhere from Frankfurt to Zagreb,专centralized mining infrastructure hubs, and onwards to the ever-growing destinations added to our portfolio daily. Wherever your hammer operates, MERIT guarantees direct, uninterrupted factory-to-port or factory-to-door delivery.
High-Velocity Kinetic Impact Centerpiece for 70 to 120-Ton Excavator Hammers
The Hydraulic Breaker Piston (interchangeably referred to as the Percussion Piston, Striking Core, or Hammer Ram) is the central energy-transfer component within the Atlas Copco / Epiroc HB 7000 and HB 7000 DP (DustProtector)heavy-series rock breakers. Weighing nearly 785 pounds and spanning over 52 inches in length, this massive monolithic piston reciprocates inside the cylinder assembly at rates up to 450 blows per minute. Powered by a combination of high-pressure hydraulic oil flow (up to 450 L/min) and high-pressure nitrogen gas back-head storage, the piston converts fluid energy into thousands of foot-pounds of kinetic energy, striking the 210 mm diameter working chisel to demolish high-yield hard rock and reinforced concrete.
Epiroc Rammer Atlas Copco Hydraulic Breaker Parts+ 1
MERIT engineers premium aftermarket replacement pistons using high-grade, vacuum-degassed SAE 4340 alloy steel(or specialized Ni-Cr-Mo structural steel). Every piston undergoes a sophisticated multi-stage case hardening and precise heat-treatment process to achieve an optimized surface-to-core hardness profile (measured precisely in HRC). This ensures the striking face withstands intense impact elastic wave stresses without chipping, spalling, or micro-cracking, while maintaining structural ductility in its center core to handle brutal rebounding shockwaves.
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Technical Features and Manufacturing Standards of MERIT HB 7000 Pistons
Surviving the severe mechanical vibrations, extreme temperatures, and strict tolerances of a heavy hydraulic cylinder requires expert manufacturing control. MERIT ensures zero field failures through:
1. Advanced Case-Hardened Impact Face
The striking surface that interfaces directly with the tool shank receives an optimized deep-case heat induction profile. This metallurgical gradient prevents the face from deforming, pitting, or expanding “mushrooming” under relentless high-frequency contact pressure.
2. Micro-Ground Hydraulic Sealing Surfaces
The sealing steps and outer diameters of our pistons are machined on ultra-precise CNC cylindrical grinders to micron-level straightness, roundness, and surface finish (Ra). This low-friction micro-surface optimizes the performance of dynamic high-pressure polyurethanes inside the seal kit, preventing fluid blow-by, stabilizing operating pressure (160–180 bar), and extending seal lifespan.
3. Integrated Shockwave Dissipation Design
The transitions between the varying diameters along the length of the piston feature large, perfectly blended radii. Eliminating sharp steps removes mechanical stress-concentration zones, neutralizing the destructive destructive tension-compression rebound waves generated during blank firing or uneven rock breakage.
Primary Maintenance Applications
- Major Percussion Unit Overhauls: Replacing damaged, scored, or worn pistons during mid-life breaker service intervals to restore factory-spec hydraulic volumetric efficiency and maximize blow energy.
- Preventative Cylinder Salvage: Swapping a scuffed piston before surface micro-abrasions score the internal main cylinder bore, avoiding catastrophic and expensive housing replacements.
- Hard-Rock Mining Fleet Support: Keeping high-production primary blast-free rock excavation, trenching, and secondary breaking fleets running at peak capacity across global mineral operations.
Product Specifications
| Engineering Specification | Structural & Logistic Values |
|---|---|
| Product Line | Hydraulic Breaker Piston / Percussion Piston / Hammer Ram |
| Compatible Model | Atlas Copco / Epiroc HB 7000 & HB 7000 DP (DustProtector) |
| OEM Reference Part Number | 3363 0870 06 (Replaces 3363087006) |
| Working Tool Diameter Fit | Engineered for 210 mm Tool Interface |
| Physical Dimensions | Length: ~52.44 inches (1332 mm) | Diameter: ~8.86 inches (225 mm) |
| Component Weight | Approximately 785 lbs (356 kg) |
| Material Base | Vacuum-Degassed SAE 4340 Ni-Cr-Mo High-Hardness Alloy Steel |
| Logistics & Supply | Direct Delivery to Adelaide, Darwin, Kalgoorlie, Perth, Brisbane, Frankfurt |
| Manufacturer & Supplier | MERIT Global Spare Parts |
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