Ballast Under Cutter

Rail Safety
Real Sense
Ballast
Under Cutter
The Stobart Rail Ballast Under Cutters and the process in which they are used has been
developed and improved so that ballast can be excavated and replenished without the requirement
to remove the track from the infrastructure.
The machines working alongside road rail excavators and a team of highly qualified operators
can efficiently remove ballast from underneath the following:
•
•
•
•
Plain line
Single line
Switches and crossings
3rd and 4th rail
They can also be used for:
•
•
•
•
•
Track lowering
Wet beds
Removal of contaminated ballast
Applying cross fall to the formation
Improvement of drainage
Capable of removing spoil at 70m² per hour and at a depth of up to 350mm below bottom of
sleeper. This method has proven to be a cost effective way of improving the infrastructure without
the need for major disruption caused by time consuming blockades where the track has to be
removed to allow ballast removal by conventional methods.
To enhance the procedure used, these machines can be delivered to remote accesses using
Stobart Rail specialised road transport where they can be on track using level crossings or
approved RRAP’s thus removing the complex planning required to get plant to site via the rail
infrastructure.
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Driver comfort and control
W175 Machine has been designed with driver comfort and machine control
being paramount. The operator can select every machine command from a
sitting position and can also view the whole operation from the cab. The cab in
the earlier machine W147 has been re-designed to improve operator comfort,
machine control and vision.
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Conveyor system
Complex conveyor system can discharge
the spoil throughout a 110° swathe either
into a train onto the cess or into a Unimog
towing rail trailers and spoil boxes. The
swing conveyor on the end of the main
unit reduces spillage of the spoil during the
transition between rail wagons.
Spoil Removal
Wheel
The Ballast Under Cutter bar and spoil
removal wheel can transit spoil from
under the track, through the conveyor
system and onto a rail wagon at a
production rate of approximately15-20
metres per hour depending on ground
conditions.
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Removing spoil
and ballast
The spoil/ballast can be removed from
below the track up to 350mm below
sleeper base. The machine also has
the facility of putting a cross fall on
the formation to assist drainage and
excavation on canted rail.
As the ballast is removed from under the
sleepers with the cutter bar the formation
is left perfectly level to allow if required a
membrane to be placed in situ prior to
the ballast being replaced.
Support
The support team and plant that work with the Under Cutter include the following.
• RRV trenching in front of the Ballast Under Cutter.
• RRRV with large Clam Shell following the Under Cutter to replace ballast.
• RRV fitted with a Tamping Bank to compact the ballast prior to a main line tamper following through.
• A team of experienced operators both on the machines and on the ground to ensure the track geometry is
maintained whilst the work is in progress.
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Safety features
Safety features include the facility of setting up a trip
wire, protected exclusion zone and multiple emergency
stops to protect operatives from the cutter bar and
other moving parts.
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Specialist
transport
Stobart Rail have our own fleet of
specialist transport that are capable of
transporting the Ballast Under Cutters
to site by road, adapter rails allow the
machine to on/off track at RRAPs and
level crossings.
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Technical Information
W147W175
Weight
15500kg18500kg
Max Height stowed
3200mm
3400mm
Max Length Stowed
11600mm
12200mm
Wheel Base
3530
3530
Rail Wheel Diameter 508mm
508mm
Rail Wheel Profile
P1
P1
Brakes
Four Wheel Pneumatic
Four Wheel Pneumatic
Service Brake Pressure Air
4-8 bar
4-8 bar
Maximum Travelling Speed
12mph
12mph
Maximum Working Speed
3mph
3mph
Maximum Travelling Speed Through S & C
3mph
3mph
Maximum Travelling Speed Through Raised Check Rails
3mph
3mph
Minimum Travel Radius
80m
80m
Minimum Work Radius
80m
80m
Maximum Rail Cant – Travelling
200mm
200mm
Maximum Rail Cant – Working
150mm
150mm
Maximum Rail Cant - On/Off Tracking
0 – 50mm
0 – 50mm
Maximum Rail Gradient – Working
1:29
1:25
Engine
GM heavy duty diesel
engine. Model 4-71
160 BHP (Continuous @
2250rpm), water cooled,
4 cylinder
GM heavy duty diesel
engine. Model 4-71
160 BHP (Continuous @
2250rpm), water cooled,
4 cylinder
Transmission
Three speed
transmission (forward/
reverse) low and high
range, infinitely variable
hydrostatic drive
Three speed
transmission (forward/
reverse) low and high
range, infinitely variable
hydrostatic drive
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Capacities
Fuel
Hydraulic Oil
W147W175
208 Litres
291 Litres
350litres
475 litres
Dust Suppression Fitted
No
Yes
Digging Wheel Drive
Hydraulic
Hydraulic
Under cutter Bar Drive
Hydraulic
Hydraulic
Conveyor width
508mm
508mm
Conveyor Length (Digging Wheel)
2000mm
2000mm
Conveyor Length (Intermediate)
1500mm
1500mm
Conveyor Length (Delivery)
6200mm
6200mm
Conveyor Length (Swing)
N/A
1500mm
Digging wheel Diameter
2800mm
2800mm
Digging Wheel width
310mm
310mm
Maximum Undercutting depth: 350mm from bottom
of sleeper
350mm from bottom
of sleeper
Minimum Cutting Depth
150mm from bottom
of sleeper
150mm from bottom
of sleeper
Trench Width
900mm
900mm
Undercutting Speed
0.5 – 1.0 MPM depending
on ballast condition
0.5 – 1.0 MPM depending
on ballast condition
Undercutting Widths
3050mm Standard
3050mm Standard
Standard Plain Line
Cutting Bar
Cutting Bar
Undercutting Widths
3660mm Optional
3660mm Optional
Switches & Crossings
Cutting Bar
Cutting Bar
Single line cutting capability
Only if spoil can be disposed onto Cess or trackside
Yes
S & C cutting
Yes
Yes
Capable of Cutting from Cess
Yes
Yes
Capable of Cutting from 6`
Yes
Yes
Turn Table Fitted
Yes
Yes
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Rail Safety
Real Sense
Andrew Sumner
Business Development / Stakeholder Manager
t. 01228 882 300
e.andrew.sumner@stobartrail.com
Gary Newton
Estimating & Contracts Manager
t. 01228 882 300
e. gary.newton@stobartrail.com
Dave Richardson
Plant Manager
t. 01228 882 300
e.david.richardson@stobartrail.com
stobartrail.com
@StobartRailLtd