Suishan 155 SB121 Lower Hydraulic Breaker Cylinder Excavator Rock Breaker Cylinder

The SB121 Lower Cylinder (also known as the front head) is a critical core component of the SOOSAN SB121 hydraulic breaker, designed for 155mm diameter chisels and compatible with 30-ton class excavators. As the "front-end base" of the breaker's impact system, it houses the chisel, inner/outer bushings, and retaining pins, directly withstanding high-frequency impact loads and wear during operation, serving as the foundation for stable breaker performance.

Different from ordinary thin-wall and low-density breaker accessories, this upgraded Suishan 155 breaker lower cylinder adopts thickened integral cylinder body and high-density casting process, with far better pressure resistance and impact resistance than ordinary parts. The standard SB121 hydraulic breaker lower cylinder features precise hole position calibration and smooth matching surface, which perfectly fits the internal sealing structure of the breaker and effectively avoids hydraulic oil leakage caused by poor fitting. As a durable excavator rock breaker cylinder, it undergoes professional stress relief treatment to eliminate internal material stress, preventing cylinder cracking and permanent deformation during long-term heavy breaking work. It maintains stable structural rigidity under frequent impact loads, reduces equipment failure rate, lowers daily maintenance costs, and improves overall construction working efficiency.

• Mining Quarrying & Rock Breaking Operations
• Building Demolition & Concrete Structure Breaking
• Road Construction & Asphalt/Concrete Pavement Breaking
• Municipal Engineering & Site Grading Work
• Tunnel Excavation & Rock/Concrete Breaking
• River Dredging & Reef/Hard Soil Breaking
• Bridge Demolition & Pier/Foundation Breaking
• Primary Rock Breaking for Quarry Aggregate Processing

Every finished Suishan 155 breaker lower cylinder and SB121 hydraulic breaker lower cylinder undergoes strict pressure resistance test, impact fatigue test and tightness inspection before delivery to meet OEM quality standards. All installation dimensions, hole positions and structural parameters are fully consistent with original factory specifications. This premium excavator rock breaker cylinder features high compatibility with matched breaker models, supporting tool-free direct replacement without cutting, drilling or modification. With anti-cracking, anti-deformation and leak-proof advantages, it is the most cost-effective hydraulic breaker replacement part for long-term equipment maintenance.