777 HOT

Rammer's 777 heat resistant hydraulic hammer has been designed to withstand the toughest of applications that this size of hammers may be utilized in. Heat resistant seals and heavy duty housing protect vital components and ensure that no job is too tough.

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.
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.

Applications

Metallurgical industry

The metallurgical industries can be broadly divided into primary, secondary, and miscellaneous metal production operations.

Specification sheet Operator manuals

Specification

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	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)	120 dB(A)
Noise level, guaranteed (2000/14/EC)	124 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.