SBU Division
Motorized Small Boring Unit (SBU-M)
Technical Description
The Motorized SBU is the optimal choice for longer
utility installations (over 150 m) or for crossings with
specific line and grade requirements. The SBU-M is a
manned-entry, hard rock boring machine for use with a
standard Auger Boring Machine (ABM) or pipe jacking
unit. The SBU-M uses disc cutters to excavate rock,
while a small invert auger or vacuum system removes
spoils from the face. The SBU-M is bolted to the lead
casing prior to excavation for shorter starter and exit
shafts. An in-shield motor provides torque to the drive
train, while forward thrust is derived through the casing.
The Most Accurate Tunneling
The SBU-M can be steered throughout the drive from
an operator’s console inside the rear shield.
Articulation cylinders and manually adjustable stabilizer
pads allow for control of line and grade. Accuracy is
continuously monitored using a laser targeting system.
A Cost Effective Solution
The SBU-M offers more efficient excavation than typical
carbide bit or roller cone cutting heads. Most carbide
cutting tools tend to break off in rock above 75 MPa
UCS. The SBU-M uses disc cutters to chip away hard
rock from 25 to over 175 MPa UCS.
SBU-M APPLICATIONS
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Pipe jacking
Line- and grade-sensitive rock crossings
Replacement for carbide bit and roller cone cutterheads
Bore lengths over 150 m
AVAILABLE FOR PURCHASE OR LEASE