777E Heavy Duty

Applications: Boom mounted applications
Primary demolition
Trenching
Secondary demolition
Cutting of asphalt or frozen ground
Metallurgical industry
Min. working weight, flange mounted: 415 kg (915 lb)
Tool diameter: 80 mm (3 in)

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 RD Guard installed.

Product Specifications

Specification sheet (German)

Operator manual (Mongolian)

Operator manual (Croatian)

Operator manual (Czech)

Operator manual (Danish)

Operator manual (Estonian)

Operator manual (Finnish)

Operator manual (French)

Operator manual (German)

Operator manual (Hungarian)

Operator manual (Italian)

Operator manual (Norwegian)

Operator manual (Portuguese)

Operator manual (Russian)

Operator manual (Slovak)

Operator manual (Spanish)

Operator manual (Swedish)

Operator manual (Bulgarian)

Operator manual (Dutch)

Operator manual (Icelandic)

Operator manual (English)

Min. working weight, flange mounted: 415 kg (915 lb) ¹⁾
Weight: 340 kg (750 lb)
Impact rate (frequency): 500 - bpm
Operating pressure: 90 - 140 bar ( - psi)
Oil flow range: 40 - 120 l/min (11 - 32 gal/min)
Pressure relief setting: 140 - 190 bar ( - psi) ²⁾
Pressure relief max: 220 bar
Pressure in LP-circuit: 36.00 - 38.00 bar (520.00 - 550.00 psi)
Back pressure max: 20.00 bar (290.00 psi)
Input power: 28 kW (38 hp)
Tool diameter: 80 mm (3 in)
Pressure line connection (IN): BSPP-internal 3/4"
Return line connection (OUT): BSPP-internal 3/4"
Pressure line size, min. inner diameter: 19.00 mm (0.75 in)
Return line size, min. inner diameter: 19.00 mm (0.75 in)
Optimum oil temperature: 40 - 60 °C (104 - 140 °F)
Allowed oil temperature range: - 80 °C ( - 176 °F)
Optimum oil viscosity at operating temperature: 30.00 - 60.00 cSt
Allowed viscosity range: 20.00 - 1,000.00 cSt
Skid steer, robot weight, optimum: 3 - 5 t ( - lb)
Skid steer, robot weight, range: 3 - 6 t ( - lb) ³⁾
Miniexcavator, tractor backhoe weight, Optium: 5 - 8 t ( - lb)
Miniexcavator, tractor backhoe weight, range: 4.3 - 9.5 t ( - lb) ⁴⁾
Noise level, measured (2000/14/EC): 130.00 dB(A)
Noise level, guaranteed (2000/14/EC): 134.00 dB(A)

Min. working weight, flange mounted: 415 kg (915 lb) ¹⁾
Weight: 340 kg (750 lb)
Impact rate (frequency): 500 - bpm
Operating pressure: 90 - 140 bar ( - psi)
Oil flow range: 40 - 120 l/min (11 - 32 gal/min)
Pressure relief setting: 140 - 190 bar ( - psi) ²⁾
Pressure relief max: 220 bar
Pressure in LP-circuit: 36.00 - 38.00 bar (520.00 - 550.00 psi)
Back pressure max: 20.00 bar (290.00 psi)
Input power: 28 kW (38 hp)
Tool diameter: 80 mm (3 in)
Pressure line connection (IN): BSPP-internal 3/4"
Return line connection (OUT): BSPP-internal 3/4"
Pressure line size, min. inner diameter: 19.00 mm (0.75 in)
Return line size, min. inner diameter: 19.00 mm (0.75 in)
Optimum oil temperature: 40 - 60 °C (104 - 140 °F)
Allowed oil temperature range: - 80 °C ( - 176 °F)
Optimum oil viscosity at operating temperature: 30.00 - 60.00 cSt
Allowed viscosity range: 20.00 - 1,000.00 cSt
Skid steer, robot weight, optimum: 3 - 5 t ( - lb)
Skid steer, robot weight, range: 3 - 6 t ( - lb) ³⁾
Miniexcavator, tractor backhoe weight, Optium: 5 - 8 t ( - lb)
Miniexcavator, tractor backhoe weight, range: 4.3 - 9.5 t ( - lb) ⁴⁾
Noise level, measured (2000/14/EC): 130.00 dB(A)
Noise level, guaranteed (2000/14/EC): 134.00 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.
⁴⁾ Check carrier allowed attachment weight from carrier manufacturer. Check application requirements.

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.
⁴⁾ Check carrier allowed attachment weight from carrier manufacturer. Check application requirements.

Features & Applications

Features
- High pressure membrane accumulator
  Membrane-type accumulator eliminates Nitrogen leakages, ensuring constant maximum impact power and eliminating the need for recharging in field.
- Twin handed, smart
  A 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 accumulator
  The 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 mounting
  The Flange mounting design allows for the use of existing mounting plates, as well as carrier and application specific customization.
- Heavy duty housing
  Heavy 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 rods
  A 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 pin
  The 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 system
  Quick 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.
Applications
- Boom mounted applications
  Hammers 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 demolition
  Demolition of standing buildings and structures.
- Trenching
  Trenching is a form of primary breaking in which a narrow trench is excavated especially for laying pipes, cables or for installing drainage
- Secondary demolition
  Demolition of larger pieces on the ground (size reduction, separation and preliminary sorting tasks)
- Cutting of asphalt or frozen ground
  The RAMMER "Spade tool" was specially developed for cutting of asphalt or frozen ground in road construction or infrastructure.
- Metallurgical industry
  The metallurgical industries can be broadly divided into primary, secondary, and miscellaneous metal production operations.