Main Beam, Gripper and Thrust
AssemblyThe main beam and the parts that move the machine forward. Gripper shoes clamped against the walls anchor the gripper carrier, thrust cylinders push the cutterhead forward along the beam one stroke at a time, torque cylinders take the cutterhead's reaction torque, and the rear support holds the beam while the grippers reset. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Main Beam, Gripper and Thrust
8 top-level lines as of r193971| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Main Beam | main-beam-tbm-main-beam | 1× | 1 | · | part |
| 2 | Gripper Carrier | main-beam-tbm-gripper-carrier | 1× | 1 | · | part |
| 3 | Saddle Wear Pads | main-beam-tbm-saddle-wear-pads | 1× | 1 | · | part |
| 4 | Gripper Shoe | main-beam-tbm-gripper-shoe | 2× | 2 | · | part |
| 5 | Gripper Cylinder | main-beam-tbm-gripper-cylinder | 1× | 1 | · | part |
| 6 | Thrust Cylinder 5 parts | main-beam-tbm-thrust-cylinder | 4× | 4 | 0 | assembly |
| 7 | Torque Cylinder | main-beam-tbm-torque-cylinder | 2× | 2 | · | part |
| 8 | Rear Support | main-beam-tbm-rear-support | 1× | 1 | · | part |