For mines, quarries, municipal demolition and construction work, the rock breaker hammer ranks among the most common attachments for excavators. A well-matched rock breaker hammer greatly boosts your excavator’s performance. However, wrong model selection or improper operation will either cut work efficiency or even damage your equipment severely. This guide covers full core knowledge of rock breaker hammer, including model matching, chisel options, combined construction and operation rules, helping you avoid costly mistakes on site.

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Read Specification Charts: What Size Rock Breaker Hammer Fits Your Excavator?

Triangle Type

Item/Model	Unit	YGB100S	YGB200S	YGB300S	YGB400S	YGB600S	YGB800S	YGB900S	YGB1600S	YGB1900S	YGB3500S	YGB4500S	YGB5000S	YGB5500S	YGB6000S	YGB6500S
Weight	kg	105	135	150	300	410	450	800	1600	1840	2800	3200	4000	5000	5700	6200
Length	mm	900	1100	1200	1347	1528	1920	2260	2695	2810	3152	3310	3400	3400	3420	3700
Pressure	bar	90-120	90-120	90-120	110-140	110-160	120-170	150-170	160-180	160-180	160-180	160-180	160-180	180-220	200-240	200-240
Flow	lpm	15-25	20-40	25-50	40-70	50-90	60-100	80-120	120-160	130-170	170-220	200-300	210-290	220-300	230-320	360-450
Rate	bmp	900-1400	700-1200	600-1100	500-900	500-800	400-700	400-700	400-700	400-600	250-400	250-350	200-350	200-250	150-200	150-200
Hose	inch	1/2	1/2	1/2	1/2	1/2	3/4	3/4	1	1	1	1¼	1¼	1¼	1¼	1¼
Chisel	mm	40	45	53	68/70	75	85	100	135	140	155	165	175	185	195	205
Suit	ton	0.8-2.0	1.2-3.0	2.5-4.5	4-7	6-9	7-14	11-16	19-26	19-26	28-40	36-45	40-55	50-60	55-65	65-100

Top Type & Box Type (Silent Type)

Item/Model	Unit	YGB100	YGB200	YGB300	YGB400	YGB600	YGB800	YGB900	YGB1600	YGB1900	YGB3500	YGB4500	YGB5000	YGB5500	YGB6000	YGB6500
Top Type Weight	kg	85	140	160	355	440	640	900	1800	1970	2850	3160	4120	4800	5300	7200
Box Type Weight	kg	100	167	194	363	450	730	970	1950	2050	3000	3300	4250	4900	5400	7400
Length	mm	1000	1300	1400	1700	1750	2100	2400	2700	2860	3100	3286	3800	3700	4200	4300
Pressure	bar	90-120	90-120	90-120	110-140	110-160	120-170	150-170	160-180	160-180	160-180	160-180	160-180	180-220	200-240	200-240
Flow	lpm	15-25	20-40	25-50	40-70	50-90	60-100	80-120	120-160	130-170	170-220	200-300	210-290	220-300	230-320	360-450
Rate	bmp	900-1400	700-1200	600-1100	500-900	500-800	400-700	400-700	400-700	400-600	250-400	250-350	200-350	200-250	150-200	150-200
Hose	inch	1/2	1/2	1/2	1/2	1/2	3/4	3/4	1	1	1	1¼	1¼	1¼	1¼	1¼
Chisel	mm	40	45	53	68/70	75	85	100	135	140	155	165	175	185	195	205
Suit	ton	0.8-2.0	1.2-3.0	2.5-4.5	4-7	6-9	7-14	11-16	19-26	19-26	28-40	36-45	40-55	50-60	55-65	65-100

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Oversized or Undersized Hammer? 4 Golden Rules for Matching Excavator & Hydraulic Rock Breaker Machine

Random mismatching is the biggest mistake when buying a hydraulic rock breaker machine. Follow these four core rules:

Rule 1: Match excavator tonnage first. Manufacturers of rock breaker hammers always mark the applicable excavator weight range. The actual operating weight of your excavator must fully fall within this range. An overly heavy hammer damages the boom and slewing bearing; an overly light one delivers weak impact force and low productivity.

Rule 2: Check hydraulic flow second. Flow volume determines the striking frequency of the hydraulic rock breaker machine. The output flow of the excavator auxiliary valve shall match the hammer’s required flow within ±10% tolerance. Insufficient flow causes weak blows; excessive flow overheats hydraulic oil and accelerates seal aging.

Rule 3: Check the working pressure third. The rated working pressure of the hammer must stay below the maximum bearing pressure of the excavator hydraulic system. Pressure mismatch leads to unstable impact power and even permanent hydraulic pump damage.

Rule 4: Match working conditions fourth. Heavy side-type hammers fit hard rock mines; top-type models suit high-rise demolition; silent box hammers work for urban construction. Do not rely on a single parameter — evaluate tonnage, flow, pressure, and job site conditions together before purchase.

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Four Types of Rock Breaker Hammer Chisels & Rock Breaking Tips

A matched hammer also needs a proper Chisel. Different chisel shapes serve different breaking tasks:

1. Moil Point: Conical tip concentrates force on one spot with maximum penetration. Universal choice for general rock breaking and targeted concrete demolition.
2. Flat Chisel: Flat, straight blade for trenching, hard rock excavation, and pavement cutting.
3. Blunt Chisel: No sharp tip for secondary crushing of broken medium-hard stones; also used for demolition and compacting.
4. Grooved Moil Point: Slotted conical tip for sticky mine ores to exhaust trapped air smoothly.

Quick reference: Moil points for hard rock, flat chisels for trenching, blunt bits for secondary breaking, and grooved moils for sticky ore.

Struggle with Steel-Reinforced Concrete? hydraulic rock hammer + Hydraulic Shear — Perfect Demolition Combo

When demolishing heavy reinforced concrete structures, using a hydraulic rock breaker machine alone results in low efficiency and high wear. Frequent impacts crack concrete but often get stuck or bounce off dense steel mesh, causing blank firing, slow progress, and cracked chisels. The industry-standard efficient solution is pairing a hydraulic rock breaker machine with a hydraulic shear: one for breaking, one for cutting. On-site, the hydraulic rock hammer acts as the front unit to smash thick concrete into pieces and fully expose internal steel frames. Then the excavator-mounted hydraulic shear precisely snips tangled heavy steel bars into short segments. This coordinated assembly line-style operation solves two major industry pain points: unbreakable dense concrete and uncuttable steel rebar. It lifts demolition efficiency by over 50% and greatly reduces premature attachment wear from rough operation.

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90% of Rock Breaker Hammer Failures Come from Misoperation, Not Normal Wear! 5 Damaging Operating Mistakes

Industry consensus: Most hydraulic rock hammer breakdowns stem from wrong operation instead of natural wear. Below are the five most harmful practices:

1. Blank Firing / Empty Beating

Wrong operation: Operators keep stepping on the striking pedal when the chisel is not fully pressed against materials, after rocks crack, or when the hydraulic rock hammer hangs in mid-air.

Hazards & Mechanics: Normal impact energy transfers from the piston through the chisel to rock or concrete. Blank firing traps massive energy inside the hammer and creates destructive rebound shockwaves. These waves overload Through Bolts, front cylinder, and piston, causing bolt fatigue fracture, front housing cracking, or piston spalling.

Standard Rule: Press the chisel vertically onto work surfaces with the excavator weight before striking. Stop striking immediately once the materials split.

2. Prying / Leveraging

Wrong operation: After inserting the chisel into rock cracks, operators push or pull the boom to pry rocks loose.

Hazards & Mechanics: The hydraulic rock hammer is only designed for vertical axial impact, not lateral bending force. Prying generates extreme side shear stress on the Chisel, Inner Bushing, and piston. This causes abnormal bushing wear, eccentric piston movement, cylinder wall scratching (cylinder scoring), and severe hydraulic oil leakage. In severe cases, the chisel snaps off at its root.

Standard Rule: Never use a hydraulic rock hammer as a crowbar. Use standard buckets or lifting gear to move large broken stones.

3. Continuous Hammering on One Spot

Wrong operation: When hitting hard rock such as granite or basalt, operators strike the exact same spot for over 15–30 seconds without switching positions, even if no cracks form.

Hazards & Mechanics: Long continuous impact traps energy and creates extreme local heat. The chisel tip suffers thermal annealing, losing hardness and deforming into a mushroom shape. Excess heat transfers to hydraulic circuits, overheating oil, carbonizing Oil Seals, and contaminating the whole hydraulic system with black oil, which weakens excavator power.

Standard Rule: Do not strike a single point longer than 15 seconds. If no cracks appear, shift position and break gradually from edges to center.

4. Angled Striking

Wrong operation: The chisel hits materials at a slant instead of staying perpendicular to the work surface.

Hazards & Mechanics: Tilted striking changes full surface contact between piston and chisel rear into point contact, creating eccentric force. This disrupts straight piston travel and scratches the precision-ground cylinder inner wall.

Standard Rule: Adjust boom and stick angles constantly to maintain a strict 90° vertical angle between chisel and material surface.

5. Improper Greasing

Wrong operation: Grease injection while the hydraulic rock breaker machine hangs vertically or lies flat; or insufficient regular lubrication.

Hazards & Mechanics: Grease injected without firm ground contact fills the front piston cavity through bushing gaps. On restart, fast piston impact generates instant ultra-high pressure from incompressible grease, rupturing main hydraulic oil seals. On the contrary, rare greasing leads to dry friction between the chisel and bushing, heavy abrasion, and piston scratches.

Standard Rule: Only add grease when the hammer stands vertical on the ground with the chisel fully retracted. Inject grease every 2–3 hours during continuous work shifts.

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From model matching and chisel selection to combined construction and standard operation, the value of a hydraulic breaker for sale depends entirely on proper selection and maintenance. YG Machinery supplies three full lines: Triangle Type, Top Type, and Silent Box Type, covering excavators from 0.8 ton to 100 ton for all working scenarios. Whether you break hard rock in mines, demolish buildings in cities, or conduct fine tunnel excavation, you can find a perfectly matched hydraulic rock hammer. Correct operation and routine maintenance let your hydraulic rock breaker machine run stably on construction sites, acting as your excavator’s reliable heavy breaking tool.

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For full specs of the YG rock breaker hammer and professional model matching advice, feel free to contact us anytime. We provide one-stop service, including model recommendation, working condition analysis, and after-sales technical support.