Specifications are subject to change without notice (Wednesday, August 23, 2023)
777E Heavy Duty
Heavy-duty Rammer 777E has been made for demanding conditions. The 415 kg hammer is suitable for carriers in the 2.6 to 9.5 tonne range.
Robust housing withstand wear and no-tie-rods enables fast and easy servicing. Twin handed design allows optimal mounting on both left and right-handed carriers, prolonging the service life of the hose connections.
The Rammer 777E Heavy Duty Small hydraulic hammer comes with remote monitoring device RD3 installed.
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777E Heavy Duty
- High pressure membrane accumulatorMembrane-type accumulator eliminates Nitrogen leakages, ensuring constant maximum impact power and eliminating the need for recharging in field.
- Twin handed, smartA connecting block allows easy adaptation to different excavator setups. This twin handed design allows optimal mounting on both left and right handed carriers, prolonging the service life of the hose connections. Easy installation with hydraulic quick hitch mounting brackets.
- Tubular accumulatorThe leak-free tubular accumulator is filled with nitrogen and requires no maintenance or time-consuming recharging between maintenance intervals. With its large surface area and short hydraulic connections to the piston, it effectively reduces pressure fluctuations in the hydraulic system and ensures maximum piston acceleration and high impact frequency. This design provides 100% power at all times.
- Flange mountingThe Flange mounting design allows for the use of existing mounting plates, as well as carrier and application specific customization.
- Heavy duty housingHeavy duty housings feature a robust structure, are made of wear-resistant steel, with minimum number of holes. Resulting in a longer housing lifetime even in the harshest of applications, reducing the cost of ownership through less maintenance.
- CBE+ (Constant Blow Energy plus)The RAMMER CBE-System (CBE = Constant Blow Energy) with the active pressure control valve and the permanently filled tubular accumulator maintains the hydraulic pressure level to ensure that each impact delivers the maximum possible power. The RAMMER CBE system accepts a wide range of oil flows and high back pressures, allowing a wide range of carriers to be used. The "+" stands for safe and fast connection to the carrier.
- No tie rodsA smart design without tie rods allows for ideal guidance of the piston and optimal alignment of the tool. Fast, safe and easy to maintain without the need for special tools.
- Single part tool bushing retained with shared tool pinThe one-piece quick-change tool bushing inludes a thrust ring, the upper and the lower tool bushing into one component. This quick-change tool bushing can easily be replaced on site, making maintenance easier, faster and safer.
- Fast-change tool systemQuick and safe tool change system transverse to the hammer. No need to reach under the hammer during tool change.
- RD3 incl. SAM (as standard)RD3 for SAM as standard. Online hour meter and location tracking in Google MapsTM. For further information, please contact your Rammer distributor.
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Applications
- Boom mounted applicationsHammers for use on crushers to ensure unrestricted flow of process. Removal of boulders which are too large to fit into crusher or which block the grizzly. Absolutely necessary to ensure safe working procedures.
- Primary demolitionDemolition of standing buildings and structures.
- TrenchingTrenching is a form of primary breaking in which a narrow trench is excavated especially for laying pipes, cables or for installing drainage
- Secondary demolitionDemolition of larger pieces on the ground (size reduction, separation and preliminary sorting tasks)
- Cutting of asphalt or frozen groundThe RAMMER "Spade tool" was specially developed for cutting of asphalt or frozen ground in road construction or infrastructure.
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Specification
Minimum working weight, flange mounted *1 415 kg 915 lb Weight 340 kg 750 lb Working length 1449 mm 57.0 in Impact rate (frequency) 500 – 1700 bpm Operating pressure 90 – 140 bar 1305 – 2030 psi Oil flow range 40 – 120 l/min 10.6 – 31.7 gal/min Pressure relief setting *2 140 – 190 bar 2030 – 2755 psi Pressure relief max 220 bar 3190 psi Pressure in LP-circuit 36 – 38 bar 520 – 550 psi Back pressure max 20 bar 290 psi Input power 28 kW 38 hp Tool diameter 80 mm 3.15 in Pressure line connection (IN) BSPP-internal 3/4″ Return line connection (OUT) BSPP-internal 3/4″ Pressure line size, min. inner diameter 19 mm 0.75 in Return line size, min. inner diameter 19 mm 0.75 in 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 Skid steer, robot weight, optimum 3.3 – 5.2 t 7300 – 11500 lb Skid steer, robot weight, range *3 2.6 – 6.3 t 5700 – 13900 lb Miniexcavator, tractor backhoe weight, Optium 4.9 – 7.8 t 10800 – 17200 lb Miniexcavator, tractor backhoe weight, Range *3 4.3 – 9.5 t 9500 – 20900 lb Noise level, measured (2000/14/EC) 130 dB(A) Noise level, guaranteed (2000/14/EC) 134 dB(A) *1 Includes average mounting bracket and standard wear parts
*2 Minimum setting = actually measured operating pressure + 50 bar or 725 psi
*3 Check carrier allowed attachment weight from carrier manufacturer. Check application requirements.
