Rammer 2577 hydraulic hammers is suitable for carriers in the 21 to 30 tonne range, the 1,700 kg hammer with an impact rate of 450 to 750 blows per minute, features Rammer’s Fixed Blow Energy operating principle that ensures optimum impact energy with every blow, regardless of hydraulic flow fluctuations.
More efficient than relief/check valves, Ramvalve detects overflow, prevents damage from system overload and protects against premature failure.
Ramlube I (Optional)
Carrier mounted greasing device
The twin-handed design allows optimal mounting on both left and right handed carriers, prolonging the service life of the hose connections.
Ramlube II (Optional)
Mounted greasing device, with adjustable flow and cartridge feed.
Membrane type accumulator
Membrane-type accumulator eliminates nitrogen leakages, ensuring maximum piston acceleration and removing the need for time-consuming recharging.
FBE (Fixed blow energy)
A built-in pressure control valve maintains hydraulic pressure levels to ensure that every blow delivers the maximum power possible optimum productivity.
VIDAT tie rods
Vibration Dampened Tie Rods, spherical tie rod nuts and damper bushings ensures piston moves freely for longer, more productive working life.
Idle blow protector (Optional)
Idle Blow Protection ensures the hammer cannot be operated until pressure is placed on tool. This eliminates tie rod stress, reduces oil overheating and protects against premature failures.
Soft blow sensor (Optional)
The Soft Blow Sensor SBS slows the product down and reduces power to minimize blank firing damage, making products with the SBS ideal for secondary breaking. This will not effect the power when there is normal contact between tool and material to be broken.
Trenching is a form of primary breaking in which a narrow trench is excavated especially for laying pipes, cables or for installing drainage
Hydraulic excavators have largely replaced cranes with wrecking balls, enabling demolition to be carried out in a much more controlled and efficient manner.
Low clearance hammer tunneling
Especially in the underground mining industry the tunneling operations do not always allow for enough clearance, this restricts the types of carriers that can work in these environments.
When blasted rock is too big for the feeder or crusher, secondary breaking is needed to get the boulders down to size. The type of rock dictates the effectiveness of the process, with brittle rock giving the best performance.
|Minimum working weight, flange mounted *1||1760 kg||3880 lb|
|Weight||1460 kg||3220 lb|
|Working length||2299 mm||90.5 in|
|Impact rate (frequency)||450 - 750 bpm|
|Operating pressure||135 - 145 bar||1960 - 2105 psi|
|Pressure relief min *2||190 bar||2755 psi|
|Pressure relief max||220 bar||3190 psi|
|Oil flow range||140 - 200 l/min||37.0 - 52.8 gal/min|
|Back pressure max||10 bar||145 psi|
|Input power||48 kW||64 hp|
|Tool diameter||135 mm||5.31 in|
|Pressure line connection (IN)||SAE 6000 psi 1 1/4"|
|Return line connection (OUT)||SAE 6000 psi 1 1/4"|
|Pressure line size *3||26 mm||1.02 in|
|Return line size *3||32 mm||1.26 in|
|Grease connection||BSPP-internal 3/8"|
|Air connection (A)||BSPP-internal 3/8"|
|Optimum oil temperature||40 - 60 °C||104 - 140 °F|
|Allowed oil temperature range||-20 - 80 °C||-4 - 176 °F|
|Optimum oil viscosity at operating temperature||30 - 60 cSt|
|Allowed viscosity range||20 - 1000 cSt|
|Carrier weight, optimum||23 - 30 t||50700 - 66100 lb|
|Carrier weight, range *4||21 - 32 t||46300 - 70500 lb|
|Noise level, measured (2000/14/EC)||120 dB(A)|
|Noise level, guaranteed (2000/14/EC)||124 dB(A)|
|*1 Includes average mounting bracket and standard tool
*2 Minimum setting = actual operating pressure + 50 bar or 725 psi
*3 minimum inner diameter
*4 Check carrier allowed attachment weight from carrier manufacturer. Check application requirements.
Specifications are subject to change without notice (Thursday, April 26, 2018)