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Tunnel Boring Machine

Tunnel Boring Machine

TBM 48SC, 420, 480, 540, 600, 660, 720, 780

Tunnel Boring Machines (TBMs) range in size from 48-96-in. and consist of nine TBM models with common ease of operating controls. The sealed steering joint allows for articulation. The TBM is hydraulic steered using the high capacity main bearing. Two-speed drive motors operate in either low-speed/high-torque or high-speed/low-torque modes allow operators to precisely tailor cutting speeds and torque in varying geology for optimal productivity. The operator controls steering, maintains line and grade and monitors the soil removal process from an interior control station. As soil is excavated, dirt paddles propel it onto the belt or into the screw conveyor for transport to the haul unit. Carbide single bar and quad bar cutter heads come standard with a TBM purchase and feature rotating cutter arms for use in dry, dewatered ground and comprise a combination of durable carbide gauge cutter bits and clay spades. Standard cutter heads can be changed underground. Mixed-ground disc cutter heads for high compressive strength geology, closed face cutter heads for unstable ground or custom cutter heads options compliment the versatility of our TBMs to suit a variety of ground conditions.