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SLYM MACHINERY CO., LTD.
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   0086-13912638104    Xushuguan Economic Development Zone, New District, Suzhou China 
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Hydraulic Breaker Front Head | Replacement Spare Part

The SLYM Hydraulic Breaker Front Head (Lower Body ) is engineered to absorb extreme axial recoil impacts and side-loading forces transmitted from the chisel shank during heavy rock breaking. Precision-forged from high-grade 20CrMo alloy structural steel, SLYM front heads undergo deep gas carburizing and precision inner-bore grinding to achieve an HRC 56–62 surface hardness in critical wear zones (bushing bores and retaining pin housings) while retaining an HRC 32–40 shock-resistant core.

1. Engineered to exact OEM specifications, SLYM front heads eliminate pin-hole ovalization, bushing seat galling, and structural housing fatigue cracking caused by prying or blank firing.
2. 100% Forged 20CrMo Alloy Steel: Superior fatigue resistance compared to cast steel or lower-grade alloys.
3. Carburized Pin & Bushing Seats: Resists pin-hole enlargement and bushing spinning.
4. Universal OEM Fit: Direct replacement for Furukawa, Soosan, Montabert, NPK, and top global brands.

Factory direct supply for rebuilders & fleet owners. Contact info@slymmachinery.com!
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  • SLYM

  • China

  • 1pc

  • T/T, L/C, Western Union

  • standard export packaging

  • 3-5 working days

  • avalible

Structural Mechanics & Wear Zone Protection

The Front Head serves as the mechanical anchor of the breaker power cell. It houses the upper and lower bushings, tool retaining pins (flat pins), and bushing lock pins (round pins), bearing direct multi-directional stresses:

[Through-Bolt Tension] ═══> [20CrMo Forged Front Head] <═══ [Chisel Recoil & Prying Force]

                                                                              ║

                                                   [Carburized Pin Holes & Bushing Bores]

Under continuous impact loading, a front head with insufficient surface hardening or inadequate structural strength may be more susceptible to pin-hole deformation and bushing bore wear. SLYM's carburizing process deeply hardens these high-stress contact surfaces to 1.3 mm+ depth, locking the bushings and retaining pins in true alignment to help maintain tool alignment and reduce the risk of abnormal chisel movement and off-center piston impact.

Metallurgy & Manufacturing Specifications

Engineering Parameter

SLYM 20CrMo Forged Front Head

Material Process

100% Forged 20CrMo Alloy Steel

Heat Treatment Method

Gas Carburizing + Deep Quenching

Bore & Pin Seat Hardness

HRC 56 ~ 62

Core Impact Toughness

HRC 32 ~ 40

Effective Case Depth

≥1.3 mm

Charpy Impact Energy

≥ 55 J

Values are based on SLYM's applicable production/testing standard and should be confirmed for the specific breaker model or component specification.

Identification & Compatibility

How to Confirm the Correct Hydraulic Breaker Front Head

The correct front head should be selected according to the hydraulic breaker model and the dimensions of the related mounting and tool-guidance components.

When the original model plate or part number is unavailable, provide as much of the following information as possible:

  • Hydraulic breaker model or brand

  • Through-bolt hole diameter and spacing

  • Cylinder pilot seat diameter and depth

  • Tool retaining pin dimensions

  • Chisel shank diameter

  • Front head overall dimensions

  • Photos of the existing component

  • Technical drawing, if available

For model-specific front heads, SLYM MACHINERY can review the supplied measurements and photos to help confirm the suitable replacement configuration before ordering.

Q1. What does a hydraulic breaker front head do?

The front head is the structural component at the working end of a hydraulic breaker. It supports the tool-guidance and retaining areas and works with the bushings, chisel and retaining components to maintain proper tool alignment during impact operation.

Q2. What information is needed to identify the correct replacement front head?

The breaker model and part number are the preferred identification references. If these are unavailable, provide the through-bolt pattern, cylinder pilot-seat dimensions, retaining-pin dimensions, chisel shank diameter, overall front head dimensions, photos and technical drawings where available.

Q3. How can I check whether an existing front head can accept new bushings?

Measure the housing bore at multiple positions and compare the results with the applicable service limit for the specific breaker model. Significant ovality, deformation, severe scoring or damage to the bushing seat may indicate that replacing the bushings alone is not sufficient.

Q4. What are the common signs that a hydraulic breaker front head needs inspection or replacement?

Common signs may include excessive tool movement, abnormal chisel alignment, accelerated bushing wear, damaged retaining-pin areas, visible cracks, flange deformation or abnormal wear around the bushing seats.

Q5. What can cause premature wear of a hydraulic breaker front head?

Possible factors include excessive side loading, incorrect tool alignment, worn bushings, loose or incorrectly tightened through-bolts, unsuitable operating practices and continued operation after abnormal wear has developed.

Q6. How should a replacement front head be installed?

Installation should follow the service procedure applicable to the specific hydraulic breaker model. Mating surfaces should be clean and free from burrs, related seals and bushings should be correctly installed, and through-bolts should be tightened progressively according to the manufacturer's specified torque and tightening sequence.

Q7. Can SLYM supply hydraulic breaker front heads for different models?

Yes. SLYM MACHINERY can supply front head components for different hydraulic breaker configurations and replacement requirements. Because dimensions and mounting details vary by model, compatibility should be confirmed before ordering.

Q8. What should I send SLYM when I need a specific hydraulic breaker front head?

Please provide the hydraulic breaker model, part number if available, photos of the existing front head, key dimensions, chisel diameter and any technical drawing. This information helps SLYM check the appropriate replacement configuration more accurately.

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