KM SB121 Rock Breaker Attachment – Top-Mount Type for 27–33T Excavators

High-performance KM SB121 Top Type Hydraulic Rock Hammer for 27–33 ton excavators. Ideal for breaking concrete and rock. CE/ISO certified, durable, efficient, OEM color available.

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NoItem Data
1Productt NameHydraulic rock hammer
2ModelSB121
3ModeTOP
4Operating Weight2995KG
5Chisel Diameter155mm
6Oil Flow Mode180-240L/Min
7Operating Pressure200-220KG/cm2
8Carrier Weight27-33Tons
9colourAs Customer's Request
10Warranty12 months
11MOQ1 set
12CertificationCE, ISO
13Packaging DetailsStandard Wooden Case
  • Concrete Demolition – Pavement, walls, and old structures.

  • Mining & Quarrying – Rock fragmentation and secondary breaking.

  • Road Construction – Breaking asphalt and road bases.

  • Excavation Projects – Trenching, pipeline, and foundation works.

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KM SB121 Top Type Hydraulic Rock Breaker – Compact Power for  Excavators

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Compact and Efficient Hydraulic Rock Breaker for 27–33 Ton Excavators

The KM SB121 top type hydraulic rock hammer is a heavy-duty breaker designed for 27–33 ton excavators. Engineered with rugged construction and stable impact force, it is ideal for breaking concrete, hard rock, and asphalt. This model is widely used in urban demolition projects, highway construction, quarrying, trenching, and landscaping tasks, making it one of the best hydraulic breakers for large excavators in its class.

Key Specifications of KM SB121 Hydraulic Breaker

  • Operating Weight: 2995 kg – provides the right balance of power and stability

  • Chisel Diameter: 155 mm – suitable for medium to heavy rock breaking applications

  • Working Pressure: 90–120 kg/cm² – ensures consistent, high-impact performance

  • Oil Flow Requirement: 180–240 L/min – matches most 27–33 ton excavators

  • Certifications: CE & ISO – guarantees compliance with international safety and quality standards

Design Advantages for Heavy Excavators

The top-mounted hydraulic breaker design ensures maximum stability while reducing stress on the excavator’s boom. This not only extends machine life but also improves visibility during operation. With clearer sightlines and stronger impact stability, operators can achieve higher precision in confined job sites and increase productivity in demanding construction environments.

Reliable Choice for Contractors

The KM SB121 hydraulic hammer for 30-ton excavators is designed for contractors who require durability, flexibility, and performance. Key benefits include:

  • Custom paint color options for branding needs

  • A 12-month warranty for reliable after-sales support

  • OEM services for distributors and dealers

  • Sturdy wooden case packaging for safe and fast global shipping

Ready for Global Delivery

With compact size, high-impact power, and simple installation, the KM SB121 hydraulic breaker hammer is an excellent choice for international buyers looking for a reliable excavator breaker attachment. KEMEI ensures quick delivery worldwide, making it easier for contractors to start working immediately.

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Frequently Asked Questions (FAQ)

1. What hydraulic hammer model is right for my excavator?
If you are unsure which top type hydraulic rock hammer for excavator suits your needs, simply tell us your excavator tonnage, working conditions (such as demolition, quarrying, or roadwork), and budget. Our team will recommend the most suitable KM hydraulic breaker model for your application.

2. Can I use a KM hydraulic hammer with my current excavator plumbing system?
In most cases, yes. Most hydraulic hammers for excavators are designed to match standard plumbing setups. Please send us clear pictures of your excavator’s hydraulic lines to info@kemeibusiness.com, and our technicians will confirm compatibility or suggest small modifications to ensure the breaker hammer works smoothly.

3. How do I get a receipt after purchase?
Once your order of a KM hydraulic breaker hammer is confirmed, our sales team will email you a detailed receipt along with shipping documents and tracking details for global delivery.

4. Are you a manufacturer of hydraulic breakers?
Yes. KEMEI is a professional hydraulic hammer manufacturer in China, located in Yantai City, Fenghuang Mountain Road, Fushan District. With over 80,000 m² of production space and advanced equipment, we produce a full range of side type, top type, and silent type hydraulic hammers for excavators of different sizes.

5. Is KM the cheapest hydraulic hammer on the market?
Not always. Instead of being the cheapest, KM focuses on offering the best value hydraulic breaker for excavators. Very cheap hammers often lead to higher hidden costs such as frequent downtime, poor support, or a short service life. KM hammers are built with durable materials, global dealer support, and a 12-month warranty, ensuring long-term reliability and cost-effectiveness.


About KEMEI Machinery

KEMEI has a complete and certified quality management system. Our factory covers more than 80,000 square meters and is one of the technical leaders in China’s construction machinery industry.

We specialize in a wide range of excavator attachments and machinery tools including:

  • Hydraulic hammers, shears, rippers, rammers

  • Buckets, timber grabs, augers, rotary tillers

  • Forklifts, front sweepers, snow removal equipment

  • Trenchers, plate compactors, lawn mowers

  • Attachments for forklifts, backhoe loaders, skid steers, tractors, and more

Our products are widely used in municipal works, construction, gardening, and logistics, trusted by enterprises and individual operators alike.

With reliable performance, competitive pricing, and comprehensive service, KEMEI is committed to long-term cooperation and mutual success with customers around the world.


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