Small Boring Unit Rockhead

We are offering our customers a wide range of Small Boring Unit Rockhead. The Robbins Rockhead is a powerful mid-sized tunneling machine modeled after larger TBMs that generates torque from a drive unit mounted at the cutterhead thrust bearing assembly. Each Rockhead is custom designed to fit your projecta s specifications, and is available in both Single Shield (SBU-RHSS) and Double Shield (SBU-RHDS) models.
Double Shield Rockheads are self-propelled using a gripper system, while Single Shield Rockheads must be used with a pipe-jacking system or primary liner erected in the tail shield. Torque is achieved through an in-shield drive motor.
The diameter range for the Robbins Rockhead is available between 54 inch (1.35 m) and 78 inch (2.00 m).
For bores that are over 1,000 ft (300 m) in length. The maximum bore length is dependent on ground conditions and other specifications on your project.
The Robbins Rockhead can be used in conjunction with:

a c Steel casing
a c Reinforced concrete pipe
a c Ring beam and board
a c Four flange liner plate