SB81 Straight Type Hydraulic Rock Breaker Straight Hammer Excavator Demolition

This SB81 straight hydraulic rock breaker has exclusive structural advantages of straight hammer design, perfectly matching medium excavator daily construction demands.

1. Full straight integrated cylinder, no side bulge, small overall volume, can work in alley, basement, narrow foundation pit where side breakers cannot reach;
2. Central force transmission structure, uniform internal stress distribution, less cylinder wear, effectively reduce cylinder cracking risk during long heavy striking;
3. Built-in SB81 standard directional control valve, sensitive oil circuit switching, stable striking frequency, no intermittent hitting or jamming;
4. Thickened wear-resistant cylinder wall, high pressure and impact resistant, adapt long-time continuous mining and engineering operation;
5. Optimized shock absorption buffer structure, lower vibration transferred to excavator arm, protect main pump and excavator body;
6. Universal SB81 spare part system, all chisels, seal kits, charging valves fully interchangeable with ordinary SB81 side hammer, easy global purchasing and maintenance.

Product Technology

The SB81 straight hydraulic hammer adopts medium-duty straight breaker dedicated integrated forging and hydraulic matching technology.

1. Cylinder blank integrally forged by high alloy steel, CNC overall precision turning, inner wall smooth without burr, stable hydraulic circulation;
2. Central straight force transmission design, eliminate lateral stress concentration which common on side type breakers;
3. Core piston integral quenching & tempering heat treatment, enhance impact fatigue resistance for non-stop heavy breaking;
4. Built-in matched SB81 internal directional valve, pre-calibrated oil channel to fit 20–26 ton excavator hydraulic output;
5. Multi-layer composite sealing system, high temperature and dust resistant, long-term operation with low oil leakage rate;
6. Every finished straight SB81 breaker passes high-pressure endurance test, continuous striking aging test and full sealing inspection before leaving factory.

Product Working Principle

As straight type demolition attachment installed on medium excavator arm, this SB81 straight rock breaker takes high-pressure hydraulic oil from excavator main pump as power source.

Hydraulic oil flows into central straight cylinder cavity, pushes piston to reciprocate vertically, and continuously strikes the top of standard 140mm chisel. Straight cylinder central force transmission concentrates impact energy vertically onto rock or concrete, maximize breaking efficiency without lateral force loss. Built-in accumulator stores redundant hydraulic energy to boost instantaneous striking power and smooth hydraulic pressure fluctuation. The straight body structure reduces lateral vibration offset, keeps stable striking track, ensures consistent breaking force during long-hour narrow-space construction.

Production Process

High alloy steel raw material inspection → Cylinder integral hot forging forming → CNC full outer circle & inner hole precision machining → Piston quenching & tempering heat treatment → SB81 internal valve assembly → Multi-layer composite seal installation → Straight hammer dedicated buffer fitting → Hydraulic pressure matching test → Long-time continuous striking aging test → Oil leakage & pressure holding inspection → Anti-rust anti-corrosion coating → Finished product layered packaging & global sea/air delivery

FAQ

Q1: What excavator tonnage matches SB81 straight hydraulic breaker?

A1: This SB81 straight rock hammer is perfectly designed for 20–25 ton medium crawler excavators, matching standard hydraulic pressure output of this tonnage diggers without hydraulic overload damage.

Q2: What’s the core difference between straight SB81 breaker and side SB81 breaker?

A2: Straight hammer adopts central integrated cylinder without side protrusion, fit narrow space operation, vertical central force transmission with uniform stress; side hammer has side protruding valve housing, limited in narrow working area and bears lateral stress easily.

Q3: Can I use standard SB81 chisel and spare parts on this straight SB81 breaker?

A3: Yes. This SB81 straight hydraulic breaker follows universal SB81 industry standard, all SB81 chisels, seal kits, nitrogen charging valves and pins are 100% interchangeable.

Q4: Is straight SB81 breaker suitable for indoor and basement demolition work?

A4: Absolutely yes. Compact straight body without side bulge allows it to enter narrow basement, indoor room and narrow foundation pits where side breakers cannot work normally.

Q5: Will straight type hammer vibrate more seriously than side breaker?

A5: No. Equipped with dedicated straight hammer buffer structure and central force transmission design, its vibration is lower than ordinary side SB81 hammer, better protecting excavator arm and hydraulic pump.