PowerkW273338485
Pump ratingl / min2 x 280 – 1 x 2003 x 300 – 1 x 2002 x 600 – 1 x 300
Dimensions (XYZ)mm4000 x 1900 x 22004000 x 2200 x 30005500 x 2400 x 3000
Weightt71220
mm4150 x 31006100 x35006200 x43006500 x4600
mm2600355030003200
mm800900900900
mm2000210026002600
mm150350450450
760 / 370
RDM 1500 / RDM 2000
1100 / 460
RDM 2500
1500 / 660
RDM 3000
Hydraulic
Casing Rotator
General Remarks
RDM/RDM-M
RDM-M 2000 in operation
The hydraulic full 360 degree turning casing rotators
are economically used to construct bored piles with
the full casing method under hard soil conditions.
The continuous cutting of the hard ground guarantees a boring speed satisfying today's requirements, even for compressive resistance of up to
2500 kg/cm2.
The full 360 degree continuous turning of the casing
minimizes the friction compared to the oscillating
method allowing the casing to drill down to 100 m
depth with the casing rotator machines.
The first casing is fitted with carbide bits which can
be adapted to the requirements of the soil conditions offering major advantages when coring
through hard rock layers or when constructing
secant walls.
The full 360 degree continuous turning of the casing
by powerfull hydraulic motors eliminates the possibility of pile misalignment.
Beyond that, the casing rotators are especially suitable for the construction of full casing displacement
piles because of the ability to apply very high
torque, push down and lifting forces on the casing
which is not possible with the known drilling rigs.
3
Hydraulic
P
CG
B
A
D
L
M
F
E
J
K
I
H
N
O
Casing Oscillators
VRM
Technical Data
VRMVRMVRMVRMVRMVRMVRMVRMVRM
13001500200022002500280030003000T1100 3300T1260
Stroke
Lifting force
Clamping force
Rotation angle
Torque
Operating pressure
Travel of casing
Weight
A
Width of machinemm235028503200340040004300450045004880
C
Length of machinemm6500650075007500880091009140990010470
D
Min. spacingmm120013001600173022302400260026702950
E
Width of cradlemm101510151015101510151015101510151015
F
Width of machine excavator sidemm120014001400140015001500150016001600
G
Cradle pathmm1300160013001300-----
H
Axis excavator sidemm700700700700700700700700700
I
Height of machine excavator sidemm87087090094011301130116512251265
J
K
L
M
N
O
P
Height of cradle guidemm600650650650700700800800800
Height from ground to top of cradle guide mm110012001300130014001400150015001620
Height of machinemm180018501950205025802580261026102730
Height of casing guidemm2820322032203220----Angle of inclination, in front°6666----Angle of inclination, in rear°8888----Angle of inclination, casing guide°20202020-----
The casing oscillators can be kept in continuous operation with the specified torque and forces.
The hydraulic casing oscillators
have been designed in accordance with the latest technical
know-how. Extremely sturdy construction guarantees cost-effective use on site. By means of exact statical calculations in conjunction with higher quality material, an optimum conformity of
loads, weight and material
strength is achieved. The internal
wielding stresses – difficult to determine for static calculations,
which would affect the construction considerably – are eliminated
by means of stress relieving prior
to machining. A prominent feature
of the equipment is the clamping collar consisting
of five links operating on the boring implement. The
individual links surround the casing like a chain so
that a consistent surface pressure is exerted on the
casing circumference. In addition, the large height
of the collar (600 to 800 mm) prevents any damage
to the casings. By means of easily exchangeable
reducer pieces the oscillator can be converted,
within a few minutes, to a smaller casing diameter.
The collar opens uniformly and enables unproblematic insertion of the casing with the cutting shoe.
Another advantage of the machine is the low height
on the excavator side. The excavator can be swiveled by 360° in coupled condition.
VRM 3000 in operation
VRM
Attachment at the excavator itself is torque rigid
and guarantees the transmission of the full rotating
movement of 25° to the casing if the excavator is
firmly situated.
The design and construction of the casing oscillator
is based on the experience of many years of co-operation with companies specializing in pile foundations. In view of the high costs which would result
from a breakdown of the equipment on-site, great
emphasis has been put on exeptionally sturdy construction.
Accessories
• Upper tube guide
• Inserts
Special types
Short series for the use with rotary boring equipment or light duty types please refer to the special brochure!
The casings are designed to create cased holes down to a depth
of 35 m. Especially for the construction of bored piles by rotary
drilling rigs precisely fitting casing
joints guarantee a fast placement
and bolting of the casings as well
as ideal power transmission.