Underground - Longwall

Caterpillar is the global market leader and supplier of complete longwall systems. All over the world, our equipment and systems are meeting the demands of underground mining under the most stringent conditions. Adapted to the mining challenges faced by our customers today, Cat customized systems range from hydraulic roof supports, automated plow systems, shearers, face conveyors and drive systems to automation and roof support carriers.Caterpillar delivers your system of choice, from low to high seam heights, for the longest longwalls and highest production demands.


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Armored Face Conveyors

Model Top Plate Thickness Bottom Plate Thickness Dogbone Breaking Force
PF3 30 mm (1.18 in) 0.78 in 449618 lb
PF4 40 mm (1.57 in) 0.98 in 809312 lb
PF5 50 mm (1.96 in) 1.18 in 1.01164e+006 lb
PF6 30 plus 25 mm (1.18 plus 0.98 in) 1.18 in 1.01164e+006 lb
PF7 30 + 25 mm (1.18 + 0.98 in) 1.18 in 1.01164e+006 lb
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CST Drive Systems

Model Maximum Output Torque for a Short Duration (3 sec.) Maximum Input Speed (motor speed) Weight (without oil) - In-line Drive System
CST115 848196 ft-lb 1,782 rpm 36165 lb
CST30 221269 ft-lb 1,500 rpm @ 50 Hz (1,800 rpm @ 60 Hz) 8600 lb
CST45 331858 ft-lb 1,782 rpm 13007 lb
CST45 M 331858 ft-lb 1,782 rpm 15873 lb
CST45 V 331858 ft-lb 1,782 rpm 13000 lb
CST65 479415 ft-lb 1,500 rpm @ 50 Hz (1,800 rpm @ 60 Hz) 16094 lb
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Plows

Model Coal Hardness Maximum Installed Power Mining Height
GH1600 Medium to extremely hard coal 2 × 800 kW (2 × 1,080 hp) 1.1 m-2.3 m (43 in-90 in)
GH800 Soft - hard coal 2 × 400 kW (2 × 540 hp)
GH800B Soft-hard Coal 2 × 400 kW (2 × 536 hp) 0.8 m-2.0 m (31.5 in-79 in)
RHH800 Soft - hard coal 2 × 400 kW (2 × 536 hp)
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Roof Supports

Model Height (Extended) Shield Centers Shield Density
Customized Roof Support Systems 1100-6100 mm (43.3-240.2 in) 1500-2050 mm (59-80.7 in) up to 111 tonne/m2 (12.5 ton/ft2)
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Roof Support Carriers

Model Carry Capacity Vehicle Length Vehicle Width
SH620 22 tons 31.17 ft 9.35 ft
SH630 36 tons 35.7 ft 9.51 ft
SH640 D 44 tons 30.18 ft 8.69 ft
SH650 50 tons 38.32 ft 9.94 ft
SH650 D 50 tons 38.32 ft 9.94 ft
SH650 VFD 50 tons 38.58 ft 9.94 ft
SH660 D 60 tons 33.04 ft 10.17 ft
SH660 HD 66 tons 33.04 ft 10.17 ft
SH680 88 tons 45.28 ft 12.96 ft
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Shearers

Model Typical Machine Length Installed Power Haulage System
EL1000 44.7 ft 1916 hp AC inverter drive
EL2000 45.1 ft 2548 hp AC
EL3000 49.9 ft 3078 hp AC
EL4000 55.8 ft 3680 hp AC inverter drive
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Mining Controls

Model Operating System Processor RAM Memory
MCU2 Windows 7 Intel Core i7, 2.1 GHz 4 GB
PMC-D/PMC-D20 µITRON RTOS 32Bit RISC Microcontroller TX1940CYAF, 32MHz, internal RAM 10Kbytes, ROM 256Kbytes 4Mbytes CMOS Static RAM, 4Mbytes Flash
PMC-R µITRON RTOS 16Bit Microcontroller TMP91CW12AF, 27MHz, internal RAM 4Kbytes, ROM 125Kbytes 2Mbytes CMOS Static RAM, 4Mbytes Flash
PMC-V µITRON RTOS 32Bit RISC Microcontroller TX1940CYAF, 32MHz, internal RAM 10Kbytes, ROM 256Kbytes 4Mbytes CMOS Static RAM, 4Mbytes Flash
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Variable Frequency Drives

Model Rated Power Input Voltage Maximum Operational Torque
VFD-A1200/W1200 1609 hp 3300V ± 10% 210 %
VFD-A800/W800 1072 hp 3300V ± 10% 210 %