Rammer has always been at the forefront of hammer development, and the 777 scaler is just a part of the next phase in hammer development for special applications, such as scaling.
The twin-handed design allows optimal mounting on both left and right handed carriers, prolonging the service life of the hose connections.
Single lower tool bushing
The single lower tool bushing, replaces the need for an upper and lower tool bushing, whilst being field replacable. This makes for faster and easier field service.
- Air pipeing
Membrane type accumulator
Membrane-type accumulator eliminates nitrogen leakages, ensuring maximum piston acceleration and removing the need for time-consuming recharging.
- Water jet pipeing
- Lowered operating pressure
- Grease pipeing
- CBE+ (Constant blow energy plus)
No tie rods
Fast and easy to service with no particular tooling needed for it
Scaling is removal of loose material from the tunnel roof and walls to prevent accidents by falling rocks.
|Minimum working weight, flange mounted *1||385 kg||850 lb|
|Weight||315 kg||690 lb|
|Working length||1449 mm||57.0 in|
|Impact rate (frequency)||500 - 1700 bpm|
|Operating pressure||80 - 130 bar||1160 - 1885 psi|
|Pressure relief min *2||130 - 180 bar||1885 - 2610 psi|
|Pressure relief max||220 bar||3190 psi|
|Pressure in LP-circuit||30 - 32 bar||435 - 465 psi|
|Oil flow range||40 - 120 l/min||10.6 - 31.7 gal/min|
|Back pressure max||20 bar||290 psi|
|Input power||26 kW||35 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 *3||19 mm||0.75 in|
|Return line size *3||19 mm||0.75 in|
|Grease connection||UNF 11/16-16-external|
|Air connection (A)||UNF 11/16-16-external|
|Water connection||UNF 11/16-16-external|
|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 *4||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 *4||4.3 - 9.5 t||9500 - 20900 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 (Wednesday, August 23, 2017)