SB81 Rock Breaker Attachment Straight Cylinder Excavator Hydraulic Hammer for 20–25 Ton Medium Excavator

The SB81 straight hydraulic hammer adopts medium-duty straight breaker exclusive integrated forging and low-vibration hydraulic matching technology:

1. Cylinder blank integral hot forged with high purity alloy steel, CNC full inner & outer circle precision turning, mirror smooth inner wall for unobstructed hydraulic circulation;
2. Central straight force transfer design eliminates lateral eccentric stress concentration defect of side-mounted hydraulic breakers;
3. Core piston integral quenching & tempering heat treatment, outstanding anti-fatigue performance to adapt frequent start-stop municipal and quarry construction;
4. 140mm chisel surface hardening forging craft, balance surface wear resistance and internal anti-cracking toughness;
5. Multi-layer composite dustproof high-temperature sealing system, resist construction mud and fine rock dust, low oil leakage rate in long cyclic work;
6. Every finished SB81 straight hammer passes medium-pressure endurance test, 24-hour continuous striking aging test and cylinder eccentric wear inspection before delivery.

Compared with traditional side-mounted SB81 hydraulic breakers, straight cylinder SB81 rock hammer has prominent targeted construction advantages:

1. Slim seamless straight body without side protrusion, access narrow basements, alleys and foundation pits unreachable by side hammer, wider application range;
2. Central vertical force transfer, uniform stress without eccentric wear, extend cylinder service life and reduce frequent cylinder replacement cost;
3. Low lateral vibration, less abrasion to excavator boom and hydraulic pump, cut main machine maintenance expenditure;
4. 100% compatible with all standard SB81 spare parts, accessory dealers do not need extra separate inventory;
5. Stable moderate heavy striking power, high breaking efficiency without redundant energy waste for medium hard rock;
6. Factory direct industrial-grade production, stable balanced performance, high cost performance for medium batch municipal and quarry procurement.

Alloy steel raw material incoming inspection → Integral cylinder hot forging forming → CNC inner hole & outer circle precision mirror turning → Piston quenching and tempering heat treatment → 140mm chisel surface hardening forging → SB81 built-in directional valve assembly → Multi-layer composite dustproof seal installation → Straight hammer multi-stage buffer component matching → Medium-pressure hydraulic matching calibration test → Long-time cyclic striking aging test → Cylinder eccentric wear & air tightness inspection → Anti-rust anti-corrosion coating treatment → Shockproof dust-proof packaging & global sea-air delivery

A1: This SB81 straight rock hammer is perfectly customized for 20–26 ton medium crawler excavators, matching standard medium-pressure hydraulic output of this tonnage diggers without hydraulic overload damage to main pump.

A2: Straight hammer adopts slim integral cylinder without side valve protrusion, suitable for narrow basement and indoor construction; side hammer has protruding valve housing on side, limited operation space and bears obvious lateral eccentric vibration stress.

A3: Yes. This SB81 straight hydraulic rock breaker follows universal SB81 industry standard, all 140mm chisels, seal kits, nitrogen charging valves and pins are 100% interchangeable with side SB81 hammer.

A4: Very suitable. Slim straight body without side bulge can flexibly enter narrow indoor rooms, low basements and small foundation trenches where side breakers cannot work normally.

A5: No. Equipped with multi-stage straight hammer buffer assembly and central vertical force transfer design, its vibration is lower than ordinary side SB81 hammer, better protecting excavator boom and hydraulic pump.