1. Match the Hammer to the Carrier (Excavator/Backhoe)
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Carrier Operating Weight: Hammers are rated to work within a specific machine weight range (e.g., 8–14 tons, 20–30 tons).
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Rule of thumb:
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Breaker weight = 8–12% of excavator operating weight.
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Example: A 20-ton excavator should use a 1.6–2.4 ton hammer.
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👉 Undersized hammers underperform. Oversized hammers overstress the boom, arm, and hydraulic system.
2.Check Hydraulic Flow & Pressure
Every breaker has required oil flow (l/min or gpm) and operating pressure (bar/psi).
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Excavator’s auxiliary hydraulic circuit must meet these specs.
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Example: A breaker requiring 120 l/min @ 160 bar must be matched to an excavator with compatible auxiliary hydraulics.
👉 If flow is too low → weak blows. Too high → overheats and damages seals.
3. Consider the Work Type (Application)
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Hard Rock / Mining / Quarry → Larger hammer (higher impact energy).
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Concrete Demolition / Road Work → Mid-sized hammer, focus on impact frequency.
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Utility Trenching / Secondary Breaking → Smaller, lighter hammer for speed and maneuverability.
4. Match Tool Diameter to Material
The chisel diameter (tool bit) should suit the job:
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Thin chisels → faster penetration (good for concrete).
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Thick chisels → better for boulders and hard rock.
5. Impact Energy vs. Carrier Size
Impact energy (measured in Joules or ft-lb) should be proportional to carrier capacity.
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General guideline: Breaker impact energy = 150–300 ft-lb per ton of excavator.
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Example: A 20-ton excavator → breaker around 3,000–6,000 ft-lb.
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6. Other Considerations
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Frequency vs. Power:
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High frequency + low power → best for concrete.
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Low frequency + high power → best for granite/rock.
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Operating environment: Noise restrictions may require a silenced breaker.
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Transport & handling: Oversized hammers make the machine less stable.
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