SB81 Box Type Silenced Hydraulic Breaker Quiet Demolition Hammer 20-25t Excavator
Product Details
| Payment: | T/T;;Western Union;D/P;D/A;T/T | Color: | White ，Blue , Customized |
|---|---|---|---|
| Fit: | Construction Machinery Parts | Marketing Type: | Hot Product 2022 |
| Appliion: | Demolition/Mining/Rock Breaking Jobs | Compatible Equipment: | Excavators |
| Oil Flow Range: | Required Oil Flow:80-110L/min | Material: | High-strength Steel |
| Product Model: | 140 Hydraulic Breaker | ||
| Highlight |
SB81 silenced hydraulic breaker,quiet demolition hammer excavator,20-25t excavator hydraulic breaker |
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Product Description
Soosan SB81 Box-Type Silenced Hydraulic Breaker | 140mm Moil Point for Urban Demolition & Quarry Work
Break rock quietly and keep your permit hours with our SB81 box-type silenced hydraulic breaker, the low-noise triangular housing breaker built as a direct OEM-replacement attachment for 14–26 ton crawler excavators. This 140mm moil point rock hammer delivers high single-strike energy at 150–240 L/min oil flow and 160–180 kgf/cm², producing 350–600 BPM to fracture reinforced concrete, granite, basalt and oversize boulders fast — while its closed box (triangular) body with integrated sound-dampening design cuts job-site noise, contains lubricant splash, and resists side-load bending better than open-frame hammers. An induction-hardened piston, high-efficiency nitrogen accumulator, forged 140mm alloy tool, and anti-blank firing valve give you low recoil vibration, stable power over long shifts, and long service life in continuous duty. Supplied with moil point, flat chisel, wedge and blunt tools, side-bolt or through-bolt retention, and custom pin-on brackets, it's backed by ISO 9001 quality control and global technical support — dealer-level performance at contractor-friendly prices. Ask about our bulk pricing, silent-package upgrade options, and express worldwide shipping.
🔧 Key Specifications
| Parameter | Value |
|---|---|
| Model | SB81 Box-Type (Triangular / Silenced) |
| Type | Hydraulic-nitrogen combined breaker |
| Compatible Machine Weight | 20–25 Ton crawler excavator |
| Total Weight (with tool) | ~1,950 kg (verify per configuration) |
| Overall Length | ~2,250 mm |
| Overall Width | ~520 mm |
| Tool Diameter | 140 mm |
| Tool Length | 1,200–1,400 mm (standard) |
| Operating Pressure | 160–180 kgf/cm² (15.7–17.7 MPa) |
| Required Oil Flow | 150–240 L/min |
| Impact Frequency | 350–600 BPM |
| Impact Energy Class | ~260–300 kgf·m class (verify per batch) |
| Housing | Closed box / triangular body with sound-dampening |
| Back Pressure Limit | ≤10 bar |
| Tool Retention | Side-bolt / Through-bolt (specify when ordering) |
| Mounting | Pin-on bracket (pin spacing customizable) |
⚠️ Note: Dimensions, weight, noise reduction level and performance data vary by production batch and mounting configuration. Confirm your machine's auxiliary flow/pressure and arm pin spacing before ordering.
🔍 Technology & Principle
- Power stroke: Auxiliary-circuit pressure oil enters the cylinder, driving the piston forward to strike the tool shank at high velocity.
- Nitrogen energy recovery: The accumulator compresses on the return stroke, storing and releasing energy on the next forward stroke — amplifying impact while lowering flow needs.
- Self-adjusting frequency: Impact rate adapts to material resistance — higher BPM in soft material, lower BPM with greater per-strike energy in hard rock.
- Anti-blank firing valve: Mechanical sensing halts the piston when contact is lost, eliminating destructive dry firing.
- Box-body load path: The closed triangular section carries axial and lateral loads through a continuous web, reducing stress concentration at the front head.
- Low back-pressure tolerance: Runs reliably at return-line back pressure ≤10 bar, matching standard 14–26T auxiliary circuits without extra valves.
🏗️ Applications
- Urban & building demolition: Reinforced concrete columns, slabs, foundations and bridge decks where noise limits apply.
- Quarry & mine secondary breaking: Reducing oversize blasted rock at the face and near primary crushers.
- Road & highway work: Concrete pavement breaking, asphalt removal, tunnel invert demolition.
- Utility & pipeline trenching: Fracturing rock strata and hardpan for water, gas, electric and fiber lines.
- Port & industrial demolition: Old docks, furnace foundations, machine bases and industrial floors.
- Steel mill & slag breaking: Breaking slag skulls and hardened spillage in confined yards.
- Underground & tunnel work: Scaling, profile trimming and localized rock removal with reduced noise reverberation.
🚀 Advantages
- High single-strike energy: 140mm tool plus nitrogen assist breaks hard rock and heavily reinforced concrete faster than smaller-class breakers.
- Quieter operation: Closed box housing with dampening lowers dB output — helps keep work permits and neighbor complaints down.
- Better side-load rigidity: Triangular box section resists bending during prying and edge work better than cylindrical types.
- Carrier-matched performance: 150–240 L/min and ~1,950 kg suit 14–26T machines without overloading pumps or structures.
- Fuel efficient: Lower flow demand cuts carrier fuel use during long breaking cycles.
- Versatile tooling: Moil, flat, wedge and blunt tools cover rock, concrete, asphalt and prying.
- Cost-effective: 35–40% lower total cost vs. premium brands with comparable impact performance.
⚙️ Manufacturing Process
- Material selection: Side plates and body in high-strength alloy steel (42CrMo); piston and tool in alloy tool steel — spectrometry and ultrasonic verified.
- Forging & plate fabrication: Hot-forged front head plus precision-cut side plates; full-penetration welding of the box section.
- Stress relief: Post-weld heat treatment to remove residual stress and prevent frame cracking in service.
- CNC machining: Precision boring and turning hold bore and mounting tolerances within ±0.01 mm.
- Heat treatment: Piston induction-hardened to HRC 55–60; tool tip hardened to HRC 58–62 for maximum wear resistance.
- Surface & noise treatment: Shot blasting, anti-corrosion epoxy coating and internal dampening pads fitted to the box cavity.
- Assembly: Clean-room assembly with torque-controlled fasteners and imported NOKKKKK/Nachi seals.
- 100% testing: Impact consistency, leakage, noise (measured at 1 m), nitrogen hold and 500-cycle endurance run before dispatch.
❓ FAQ
A: Yes — it's designed for 20–25 ton machines. Confirm auxiliary flow of 150–240 L/min and pressure of 160–180 kgf/cm², then provide your arm pin spacing for bracket matching.
A: Box (triangular) types resist side-load bending better and are quieter — ideal for prying, edge work and urban demolition. Straight cylindrical types distribute axial loads more evenly and excel at continuous heavy rock breaking. Choose by your primary application.
A: The closed box housing with dampening typically reduces emitted noise noticeably vs. an open-frame hammer of the same class. Exact dB depends on carrier, tool and material; we can provide test data per batch on request.
A: Use a moil point for general breaking; choose a flat chisel for slab cutting and asphalt; use a wedge or blunt tip for splitting along planes or highly abrasive material.
A: Every 2–3 working hours with NLGI #2 lithium grease; every 1–2 hours in dusty or wet conditions. Never run dry.
A: Standard is 10–14 kgf/cm² (1.0–1.4 MPa); check every 250 hours. Too high = weak impact; too low = excessive recoil and seal damage.
A: Yes, provided flow/pressure meet spec and the machine's lift capacity supports ~1,950 kg. We can supply a matching bracket and longer hose kit.
A: In-stock units ship in 3–5 business days. Custom brackets or bulk orders take 10–15 business days.
Product Highlights
SB81 box-type silenced hydraulic breaker for 20-25t excavators. High-strength steel construction with 140mm moil point delivers powerful rock breaking at 150-240 L/min oil flow. Closed triangular housing reduces noise, resists side-load bending, and contains lubricant splash. Includes multiple tools and custom mounting options.
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