High productivity and low cost of ownership is yours with the MD6240 Rotary Drill. With bit load force of 24 000 kg (52,911 lb) and the capability to drill depths up to 55.47 m (182 ft) the MD6240 is well equipped to drill in hard or soft rock applications. Built to be reliable, safe and easy to service for years to come.
MD6240 Rotary Drill
Overview
MD6240 Rotary Drill
High productivity and low cost of ownership is yours with the MD6240 Rotary Drill. With bit load force of 24 000 kg (52,911 lb) and the capability to drill depths up to 55.47 m (182 ft) the MD6240 is well equipped to drill in hard or soft rock applications. Built to be reliable, safe and easy to service for years to come.
Specifications
Filtration (all filters have indicators and bypass) – Case return
12 micron
12 micron
Filtration (all filters have indicators and bypass) – Charge
3 micron, 1 per loop
3 micron, 1 per loop
Filtration (all filters have indicators and bypass) – Loop
12 micron, 2 per loop (optional)
12 micron, 2 per loop (optional)
Filtration (all filters have indicators and bypass) – Main return
12 micron absolute
12 micron absolute
Left and Right Track/Rotation Pump (Closed-loop) – Maximum flow
75 gal/min
283 L/min
Left and Right Track/Rotation Pump (Closed-loop) – Pressure rating
5800 psi
400 bar
Left and Right Track/Rotation Pump (Closed-loop) – Type
Axial piston, variable volume
Axial piston, variable volume
Pump Drive Gearbox – Drive
Rubber coupler/drive shaft to front of engine
Rubber coupler/drive shaft to front of engine
Pump Drive Gearbox – Type
3 pad
3 pad
Rotation Drive Motor – Pressure rating
5000 psi
345 bar
Rotation Drive Motor – Type
Axial piston variable volume
Axial piston variable volume
Track Drive Motors (2) – Pressure rating
6000 psi
414 bar
Track Drive Motors (2) – Type
Bent-axis fixed volume
Bent-axis fixed volume
Oil Cooling System (Hydraulic Tank)
Reservoir pressure
Atmospheric, filtered breather
Atmospheric, filtered breather
Reservoir with sight and temperature gauge
170 gal
643 L
Lubrication
Type
Centralized manual (optional auto-lubrication)
Centralized manual (optional auto-lubrication)
Pipe Rack (outside the mast)
12 m (39 ft) mast arrangement
4 pods; 10.67 m (35 ft) long pipe
4 pods; 10.67 m (35 ft) long pipe
15 m (49 ft) mast arrangement
2 pods; 7.62 m (25 ft) long pipe
2 pods; 7.62 m (25 ft) long pipe
Pipe rack index
Hydraulic motor through chain drive
Hydraulic motor through chain drive
Pipe rack swing
Hydraulic cylinders (2)
Hydraulic cylinders (2)
Size of drill pipe/capacity
114-178 mm (4.5-7 in)
114-178 mm (4.5-7 in)
Type
Carousel, with stationary pods and breaker plates
Carousel, with stationary pods and breaker plates
Winch
Cable size
0.5 in
13 mm
Rating
8000 lb
3629 kg
Benefits & Features
Best built for long life, the MD6240 has heavy-duty structures. The mast, integral A-frame, and mainframe are durable providing a strong platform needed for drilling in harsh conditions. The MD6240 is equipped to perform in challenging environments and provides high availability, positively impacting your bottom line.
All welded structures are made in house and they comply with AWS 14.3 welding standard. The welded structures are inspected after the manufacturing process providing reliable, maintenance free and long lasting platform for the drill.
Sturdy Mast
The mast is made of heavy-duty ASTM A500 Grade B steel tubing on all four chords and cross members, which creates a torsionally strong mast structure and reduces the material fatigue.
All mast structures are designed with double-cut lacing in high stress areas to prevent cracking and assure long life.
The mast can be raised or lowered with full pipe rack and full drill string on the rotary head, in less than 40 seconds.
Heavy-Duty Frame
The A-frame is an integral extension of the mainframe, providing a strong, low maintenance design.
The mainframe design assures structural integrity. The main rails, made of ASTM A500, Grade B, rectangular steel tubing, are heavily cross-braced and reinforced in high stress areas.
Undercarriage
Three point oscillating suspension allows the drill to negotiate rugged, uneven terrain without transferring excessive torsional forces to the mainframe, and allows continued stability while tramming between holes.
Tram speed is 2.0 km/h (1.25 mph). Gradeability is 66% with the mast down.
Ground clearance: 610 mm (24 in)
Bearing ground pressure: 0.83 bar (12 psi)
Solid Structures
To withstand your harsh quarry and mining environments »Learn More
To achieve low cost, high efficiency drilling, your power group configuration is selected to match the needs of your specific geology and site conditions. We have numerous configurations for low pressure rotary drilling or high pressure DTH hammer drilling. Power groups are arranged in-line for easy access, from both sides, to the engine, compressor, hydraulic pumps, plumbing and other components, which translates into safer serviceability and lower maintenance cost.
Engines
To match your application demands, MD6240 has three choices for engine sizes. Cat C27 ACERT™ @ 597 and 652 kW (800 and 875 hp) @ 2,100 rpm or a Tier 2 QST-30 @ 783 kW (1,050 hp) @ 2,100 rpm.
Each package includes:
Fuel-filtration package to overcome harsh mining environments
Pre-lube system for extra engine protection
Dry type inlet air cleaner with safety elements
Heavy duty muffler and muffler guard
Turbo and manifold blanket covers
Set of batteries
Coolant conditioner
Fuel tank
Compressor
For efficient flushing of cuttings and dust out of the bore hole, the air compressor delivers the right amount of bailing air based on hole diameter, depth and material density. Air-on-demand control system regulates air intake to match the amount of compressed air being used.
Standard Compressor is Low Pressure for Rotary Drilling Mode
Single stage, positive displacement, oil-flooded, single-stage screw type compressor
Discharge air flow (sea level) 48 m3/min (1,700 ft3/min)
Maximum operating pressure 6.9 bar (100 psi)
Optional Compressor is High Pressure for DTH Hammer Drilling Mode
Maximum operating pressure 10.3/24.1/34.5 bar (150/350/500 psi)
Cooler
For ample capability, our cooler systems are designed to assure unrestricted airflow and reduce excessive operating heat, which extends life of engine, compressor, and hydraulic components.
Rated up to 52° C (125° F) ambient cooling capacity
Split or single cooler
Side by side engine radiator
Charge air cooler section
Hydraulic oil cooler section
Stacked compressor oil section
Replaceable cores
Fan arrangements are suited to the powertrain configuration
Mounted on an isolated skid to reduce vibration, limit load transfer and noise
Hydraulic System
The pump drive is powered by direct input from the engine using a maintenance free rubber mounted coupling. The result is a longer power train life as less shock is absorbed. The coupling housing is fully enclosed with a hinged access hatch for visual inspection.
Hydraulic Pump Drive
Two axial piston pumps for the pulldown and rotation systems or track propel functions.
One axial piston pump for the cooling fans and auxiliary functions.
Two gear pumps supply power to the dust collector and water injection systems.
To assure long life, all mast structures are designed with double-cut lacing in high stress areas. There are several application-specific masts to choose from.
Pulldown and Hoist
A single, double-acting cylinder, cable pull-down system produces 22 680 kg (50,000 lb) of pull-down force and 22 680 kg (50,000 lb) of hoist force. The cylinder rod is fixed on both ends with a moving barrel, providing high efficiency and reducing feed system wear and maintenance.
One variable displacement axial piston pump in an open loop system
Bit load up to 24 000 kg (52,911 lb)
Feed and hoist speed 0-38 m/min (0-125 ft/min)
Cables
The MD6240 drill is designed with mast cables instead of chains. Cables have a predictable wear profile and do not unexpectedly fail. They can be repaired quickly and easily, and they absorb and evenly dissipate vibrations, which promotes longer mast life.
Auto Tensioning
A cable auto-tensioner ensures maximum cable service life with minimum maintenance by automatically keeping cables tight via a series of hydraulic cylinders applying constant pressure. Cables for the MD6420 are 2.85 cm (11⁄8 in) in diameter, and rated at 79 tons (173,800 lb) nominal strength.
Rotary Drill Head (1)
Achieve optimal penetration rates with the ability to select the most suitable rotation speed for your application. One fixed displacement, axial piston motor provides 139 kW (186 hp) with rotation speed 0-220 rpm. Torque reaches 12 880 N·m (9,500 lbf-ft). Heavy-duty, reliable drill head includes a 140 mm (5.5 in) bull-shaft connection to the drill string and has adjustable steel guides with replaceable pads for even travel on main chords. The long head carriage design ensures the rotary head rides the main chords evenly.
Angle Drilling
The MD6420 can drill in angles up to 25 degrees (in 5 degree increments). Dual mast locks are located under the deck and hydraulically operated dust curtains are available for angle drilling.
Pipe Rack Carousel (2)
The hydraulically operated carousel-type pipe changer is located outside of the mast structure, and all functions are controlled from a console in operator’s cab, which assures efficient and safe drill string changes and storage.
The carousel provides automatic indexing of drill pipes in relation to the rotary head.
Pipe diameter 114-178 mm (4.5-7.0 in)
12 m (39 ft) mast arrangement 4 pods; 10.67 m (35 ft) long pipe
15 m (49 ft) mast arrangement 2 pods; 15.24 m (50 ft)/two 7.62 m (25 ft) long pipe
Pipe Positioner
To help you align the pipe string while adding or detaching pipes, or in angle hole drilling, our automatic pipe positioner, hydraulically activates to grip the pipe and guide it straight through the deck bushing.
Hammer/Tricone Pipe Rack
To accommodate differences in rock consistency, a patented Hammer/Tricone Pipe Rack allows for rapid conversion between tricone drilling for soft drilling conditions, and DTH drilling, for hard rock, in less than five minutes.
Hydraulically Operated Break Out and Deck Wrench (3)
Adding to your productivity the HOBO works in concert with a highly effective deck wrench.
Mounted on the outside mast structure
Four-cylinder system for swing-adjust-rotate-clamp
Operated from inside the cab
Overhead Winch
To assist in safe and efficient handling of drill pipes, bits, subs and other heavy accessories, there is an auxiliary winch rated for up to 3629 kg (8,000 lb) capacity. Operation is from the operator’s cab, or optional remote control.
For efficient dust collection MD6240 has a dust collector rated at 127 m3/min (4,500 ft3/min) and separate water injection system. Both dry and water injection systems can be mounted on the same drill.
• Water injection system options:
– Three tanks totaling 1271 L (336 gal) mounted under the front deck or
– One tank 1514 L (400 gal) mounted on top-deck (mounted in place of Dry Dust Collector)
Dust Curtain
With the largest dust chamber in the industry, the MD6240 has a total enclosed area of 4.2 m2 (45.14 ft2) and is surrounded by heavy rubber curtains. This provides ample space for dust containment while deep hole drilling and the resulting cutting piles. Optional hydraulic front and rear dust curtain lifters are available to ensure cuttings are not pulled back into the hole while tramming from point to point on the blast pattern.
Material 6 mm (0.25 in) rubber nylon reinforced
Split for excess with 305 mm (12 in) overlap
Dust deflector is a natural rubber seal, 13 mm (0.5 in) thick, 356 mm (14 in) diameter
To limit operator fatigue the MD6240 controls are ergonomic. The FOPS certified cab has tinted safety glass windows and a closed circuit camera system for 360° visibility. Two heavy-duty doors provide quick egress to the drill table or the main deck.
Additional Safety Features
45° control console, in relation to deck, assures good overview of drill table
Closed-circuit camera system
Two heavy-duty swing doors for convenient cab access
Low sound and vibration levels
Emergency ingress/egress
Multiple engine stops
Four leveling jacks ensure a minimum of three machine points of ground contact at all times
The pipe handling system is designed so breaker plate is located at operator’s eye level
All auxiliary functions are controlled by fingertip toggle switches and marked with “no language barrier” symbols describing each function
Fixed folding trainers seat
Window washers and wipers
Spacious and Quiet Cab
For comfortable and efficient operation, the MD6240 cab offers operators 3 m2 (32 ft2) of floor area allowing ample room with a swiveling operator’s seat equipped with armrests and a headrest. The ergonomic console provides well organized controls labeled with international ISO symbols for each function. The cab is shock mounted and insulated for quiet operation below 80 dB(A). Heated and air conditioned, operator comfort is attainable in all climates.
With the support of the Cat global dealer network, you can rely on unmatched service, integrated solutions, after-sales support, fast and efficient parts fulfillment, and world-class remanufacturing capabilities.
The Cat Parts and Service Network offers you the most comprehensive product support system in the industry. Everything we do is designed to keep you up and running longer, for less. Cat authorized and certified mechanics are trained in the latest diagnostic equipment, tools and service techniques. They know exactly what to look for, and exactly how to fix it.
One of the prime cornerstones of the Cat Parts and Service Network is availability. No matter where you are, no matter what day of the week or time of day, Cat Parts and Service is never far away. At each location, you have instant access to everything from information on maintenance options, engine selection and repair, to a full range of genuine Cat Parts and Remanufactured components.
The fact is, a vast majority of the parts you'll ever need are on hand at your local dealer, right off the shelf. And in the rare event a specific part is not on hand, your dealer can usually get it to you within 24 hours, utilizing our computerized parts location network.
From helping you choose the right machine to knowledgeable ongoing support, Cat dealers provide the best in sales and service.
Preventive maintenance programs and guaranteed maintenance contracts
Best-in-class parts availability
Operator training to help boost your production
Genuine Cat Remanufactured parts
Large Main Deck
The MD6240 large deck (front and rear) plus wide walkways assure a safe operating area and more efficient maintenance. Access to walkways are on both sides of drill for quick access to all major components for daily pre-start checks, preventive maintenance and adjustments. The stationary drill table/rear deck (mast/cab area) provides access to the mast area and to the main deck during all drilling modes, including angle drilling. Immediate access to the power group including the engine, compressor, hydraulic pumps, plumbing and other components, translates into better serviceability and lower maintenance cost.
Serviceability and Customer Support
Easy and safe to access all service points »Learn More
More Value for Your Mine
Mining is a function of a number of processes, and it is important to consider the impact that optimal drilling and blasting has on your downstream mining activities such as loading, hauling, crushing, and milling.
Technology that helps you optimize and improve drill and blasting operations can positively impact your productivity and overall efficiency of the entire mining cycle. Terrain, a capability set of Cat MineStar System, enables you to precisely manage drilling through the use of guidance technology. It increases your machine productivity and provides you real-time feedback for improved efficiency.
Terrain Features
Accurately guides the operator
Reports on drill and operator productivity
Allows remote, real-time supervision of drilling activity and blast planning
Improves the accuracy of drilling depth
Provides feedback on the variation of bench geology
Improves safety and efficiency by keeping the operator in the cab
Records and measures multiple drill parameters to optimize machine utilization and improve the overall efficiency of drilling and blasting operations
Uses Global Navigation Satellite System (GNSS) to provide three-dimensional positioning of the bit ensuring holes are drilled according to the designed drill pattern
Offers a number of options enabling users to identify the features required by their mine site and then tailor the system to meet specified needs
Additional Benefits
Prior hole location
Border guard
Pipe-in-hole
Global Navigation Satellite System
Increased efficiency of design and surveying activity
Identifies local variations in bench geology for developing specific hole loading instructions
Recording is comprehensive for calculating machine utilization and productivity statistics
Technology
Cat® MineStar™ System – Terrain for Drilling »Learn More
We know keeping operators safe is a priority. Throughout Cat Drills you will find features that are designed to do just that.
Operators are comfortable, more productive and safe in our spacious and quiet cab
Cab is FOPS certified with tinted safety glass windows and a closed circuit camera system for 360° visibility
The Carousel Pipe Rack is controlled from inside of operator’s cab
A hydraulic break out wrench and deck wrench assist in breaking thread connections from inside the cab
Three point oscillating suspension allows the drill to negotiate rugged, uneven terrain without transferring excessive torsional forces to the mainframe, and allows continued stability while tramming between holes
Power groups are arranged in-line for easy access, from both sides, to the engine, compressor, hydraulic pumps, plumbing and other components, which translates into safer serviceability
Mast uses cables which have a predictable wear profile and do not unexpectedly fail like chains
An auxiliary winch rated for up to 3629 kg (8,000 lb) capacity, assists in handling of drill pipes, bits, subs and other heavy accessories and equipment from the cab or via remote control
Two heavy-duty doors provide quick ingress/egress from cab to the drill table or the main deck
Ground-level machine isolation and lock out box
Multiple engine stops
Four leveling jacks ensure a minimum of three machine points of ground contact at all times
Sustainable development for Caterpillar means leveraging technology and innovation to increase efficiency and productivity with less impact on the environment and helping you do the same – enabling your businesses to become more productive by providing products, services and solutions that use resources more efficiently.
Engines with Advanced Technology
Cat ACERT engines with advanced technology have lower emissions without compromising performance or fuel efficiency.
Extended Life
Mast structure is designed for long life and is a base for major overhauling and continued use after standard operational life. Jack casing structures, A-frame/mast pivot and the deck are integrally welded to the mainframe assuring a sound structural base with the ability to be rebuilt.
Sustainability Features
Fuel savings is achieved with our variable speed fans that match cooling demand. The coolers have replaceable cores.
The pump drive is powered by direct input from the engine using a maintenance free rubber mounted coupling. The result is a longer power train life as less shock is absorbed.
• Up to 22 680 kg (50,000 lb) rated single cylinder pulldown/hoist system
• Up to 24 000 kg (52,911 lb) bit load with one pipe in the drill string
• Patented HOBO (Hydraulically Operated Break-Out) wrench operated from the cab
• Auto cable tensioning system
• 25° angle drilling package and mast locks
• Winch 3629 kg (8,000 lb) capacity
TOP DRIVE
• Single motor
• Rotation speed 0-220 rpm
• Up to 12 880 N·m (9,500 ft-lb) torque
OPERATOR'S CAB
• Integrated FOPS
• Totally enclosed, insulated, two-man cab
• Two (2) hinged doors with heavy duty freezer type door latch system
• Ten (10) windows (safety glass, tinted)
• Windshield wiper and washer kit
• Ergonomic operator’s console with full instrumentation
• Ergonomic operator’s seat with head and armrests, retractable seat belt, air suspension mount
• Electric over hydraulic drill functions
• Auxiliary functions operated by fingertip toggle switches
• More than 3 m2 (32.4 ft2) of floor space
• Excellent visibility
• dB rating of 80 or less
• Wall mounted air conditioner/heater/pressurizer, belt driven
• Rubber shock-mounts to absorb vibration
UNDERCARRIAGE
• Excavator type, with 10 lower rollers
• 750 mm (29.5 in) triple grousers
• Full length chain guides/rock guards
MAINFRAME AND DECK
• Made of heavily cross-braced rectangular steel tubing
• Rear deck is stationary during both angle and vertical drilling modes
• Viewing hatch in rear deck, hydraulically operated from cab to help spotting holes
• Four (4) hydraulic leveling jacks (152 cm/60 in)
• Dust chamber clean-out door
• Centralized lubrication system (34 points)
• Additional mast rests mounted on non-drill end
• 1325 L (350 gal) fuel tank under engine: – Additional fuel tank available as option
• 1570 L (415 gal) additional fuel tank under compressor
• 4 × 8D batteries
CAROUSEL
• Hydraulically operated from the cab
COOLING – SPLIT COOLER ARRANGEMENT
• Maximum ambient cooling capacity of 52° C (125° F) with replaceable cores
HYDRAULIC SYSTEM
• Two (2) variable displacement axial piston pumps, in closed loop system, that operate the drill rotation, pulldown/hoist system, and tram functions
• Double-gear pump, in open loop system, for all auxiliary functions and fan circuit
• Dual filtration
DRILLING ACCESSORIES (TRICONE/ROTARY)
• Top sub adapter
• Table bushing
• Bit sub [note: 12 m/39 ft configuration: 342 cm (135 in) S-S, 15 m/49 ft configuration: 152 cm (60 in) S-S]
• Horseshoe bushing
• Bit basket
• Hoist plug (lifting bail)
• Auto tool wrench/deck wrench
DUST SYSTEM
• See Optional Equipment and select the required system
PAINT
• Standard Caterpillar Colors
OTHER
• Backup alarm
• Filter kit for 50-hour preventive maintenance
• Two (2) hard copy sets Operator/Service/Maintenance/Parts/Engine manuals, in English
• One Link-One Parts manual on CD, Operator and Service manual in pdf
• Seven (7) 60-watt LED lights for night drilling
• Side walkways and handrails with side boarding ladder
• Tool box, mounted under walkway (tools not included)
• Lift kit
• Towing hooks (front end)
• Battery disconnect
MD6240 Optional Equipment
DRILLING ACCESSORIES KIT FOR HAMMER DRILLING (IN LIEU OF ROTARY DRILL ACCESSORIES)
• Shock sub and adaptor, bit sub, two-piece table bushing, horseshoe bushing, hoist plug, bit basket, hammer oil injection system with 113.5 L (30 gal) tank
DUST COLLECTION
• Dust Collector 4500 Series
• Water injection system for dust suppression with three (3) tanks totaling 1271 L (336 gal) mounted under the front deck
• Water injection system for dust suppression with total 1514 L (400 gal) tank mounted on top-deck (mounted in place of Dry Dust Collector)
Note: Dry Dust Collector and water injection on the same drill can be selected only with below deck tanks.
DRILLING
• Drill pipe
• Roller deck bushing
• Two-piece (split) deck bushing
• Rotary head RPM gauge, digital
• Rotary torque control
• Rotary/hammer shock sub
• Rock oiler injection system (for Tricone); 113.56 L (30 gal)
• Wiggins full service (fuel, hydraulic oil, coolant, engine oil)
• Automatic lubrication system (34 points)
• Drilling pipe thread lube system, activated from inside the cab
SYSTEM PROTECTION
• Additional loop filters between pumps and motors
• Hydraulic diagnostic test station
• Engine mounted stop
• Ground level engine shutdown
• Rotating beacons (one on mast crown, one on cab, one on front-end)
COLD WEATHER AIDS
• WEBASTO system (self-contained heater for engine coolant, water, hydraulic oil, fuel)
• Cab floor heater (electric fan with heater core utilizing engine coolant)
• Heating and circulation/drainage system for water injection installation, for –40° C (–40° F) with gate valve activated by temperature sensor
• Cold weather package for temperatures down to –40° C (–40° F): – Two-speed fan arrangement for coolers – Electric heating elements for heating of fuel and water tanks, coolant, hydraulic oil tank – Insulation of bottom of the cab and fuel tanks – Compressor regulators enclosed in insulated box with electric heating element – Inlet control cylinder enclosed in a box with electric heating element – Cab floor heater – electric fan with heater core utilizing engine coolant – Thermo-glass in cab – Dead-end arctic hoses @ pivot points – Cold weather lubricants – Water injection hose (if water injection selected) with insulated sheath-electric heater – 40 kW (54 hp) diesel gen-set or on-board transformer to power heating package (mine site to provide plug)
INDICATOR SYSTEMS
• Mast lock indicator
• Jack retract indicators
• Tram interlock, jacks (with indicator)
• Tram interlock, head-position (pipe-in-hole)
• Pipe rack interlock
• Filter indicators, centrally mounted in cab (hydraulic, compressor, air intake)
MISCELLANEOUS
• Sigma TFR7 air conditioner/heating/pressurizing unit upgrade on standard cab
• Drill efficiency indicator (Thunderbird Pacific DEI Plus) without Logger
• Drill efficiency indicator with Logger
• 24 to 12 volt converter
• Extra lighting package (5 additional 60 watt LED lights)
• Blowdown hose with nozzle
• Hydraulic rear dust curtain lifting system
• Hydraulic front dust curtain lifting system
• CE conformity kit
• Special paint
• Closed circuit camera system with two cameras for front and rear mounting and monitor in cab
• Radio AM/FM, CD player and USB port for I-pod
• Radio C.B. with antenna
• XIR cab glass upgrade
• Thermal double-pane glass upgrade
• Cab window shades
• Remote jump start terminals
• Electric horn activated by push button in the cab
• Gel-cell maintenance free battery upgrade
• Main drill window cage
• Lanyard attachment – cable with traveling hook on mast, and personnel harness
• Tram remote control (pendant/cable) for operation of tram controls from ground
• Winch remote control pendant (control outside cab)
• 24V to 110V or 220V AC invertor
• Mechanical tool kit (reference TV014590)
• Three-point harness kit for operator’s seat
• Water injection flow meter
• Cab manometer
• Extreme hot weather lubricant upgrade (compressor oil)
• Extreme hot weather lubricant upgrade (hydraulic oil)
• Basic engine shut down timer
• Murphy EMS panel mounted in cab-dash
• EMS lap top harness/terminal mounted inside cab
• Mirror kit (includes three bolt-on mirrors)
• Slope indicator mounted in cab to indicate forward and lateral angle
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