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RD Rock Grinders

Rockwater’s drum cutter and rock grinder series provides a full line of models that cover most sizes of excavator and other applicable carriers. The RD rock grinders have a wide range of applications in excavation, mining, demolition, quarrying, tunneling and trenching.

 

Rockwater’s drum cutters/ rock grinders use robust spur gears driven by high-torque motors. The rotary drum cutter’s picks on twin drums will penetrate and remove materials through a combination of crushing and cutting action. The optimum number of pick and its arrangement ensures maximum cutting performance and minimum vibration.

 

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Rockwater Drum Cutter Rock Grinder Excav
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Product Features

  • Maximum cutting performance and minimum service due to unique transmission technology.

  • Low maintenance due to robust drive shaft and heavy duty sealing system.

  • Underwater operation without additional installation.

  • Wear-resistant tungsten carbide tip to withstand extreme stress and impact.

  • High torque hydraulic motor for higher productivity and longer motor life cycle.

  • Robust housing design with Hardox wear protection for higher uptime.

  • Lubrication free slide ring seal system.

 

Specification

RD50, RD100, RD150 (6,500-41,000 lbs / 3-18 ton)

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Model / Unit
Unit
RD50
RD100
RD150
Applicable Carrier
lbs / ton
6,500-16,000 / 3-7
15,000-34,000 / 7-15
27,000-41,000 / 12-18
Max. Operating Pressure
psi
5,100
5,100
5,100
Oil Flow
gpm
13-24
20-33
29-45
Pick Shank Diameter
mm
20
20
25
Number of Picks
pcs
64
64
48
Diameter of Grinder Head
C (mm)
370
370
560
Width of Grinder Head
B (mm)
615
660
730
Length of Rock Grinder
A (mm)
740
740
990
Max. Rock Hardness
Mpa
25
40
50
Max. Torque @ 5,100 psi
Nm
3,150
5,200
10,400
Max. Cutting Force @ 5,100 psi
N
17,800
23,200
36,200
Rotational Speed
rpm
90-160
80-135
60-110
Weight
lb
860
925
1,765

RD50, RD100, RD150 (45,000-74,000 lbs / 20-50 ton)

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Model / Unit
UOM
RD300
RD400
RD500
Applicable Carrier
lb / ton
45,000-74,000 / 20-33
55,000-90,000 / 25-40
78,000-112,000 / 35-50
Max. Operating Pressure
psi
5,100
5,100
5,100
Oil Flow
gpm
50-85
50-85
73-108
Pick Shank Diameter
mm
30
30
30
Number of Picks
pcs
48
48
56
Diameter of Grinder Head
C (mm)
670
670
710
Width of Grinder Head
B (mm)
880
920
950
Length of Rock Grinder
A (mm)
1,200
1,200
1,300
Max. Rock Hardness
Mpa
70
80
100
Max. Torque @ 5,100 psi
Nm
19,500
23,400
27,800
Max. Cutting Force @ 5,100 psi
N
58,200
69,900
81,800
Rotational Speed
rpm
60-90
50-90
55-85
Weight
lb
3,860
4,080
5,180