17 inch TBM Roller Cutter Single Double Center Eccenttric Disc Cutting Tools

We have invested lots of financial resources and energy in the research and development of tunnel boring machine hard rock cutting tools and solutions suitable for various rock working conditions. Litian Heavy Industry continues to conduct research and development in key construction areas such as materials, heat treatment, manufacturing processes, and constantly optimizes the tool design to improve its efficiency in cutting rocks. At the same time, a large number of on-site tests and improvements have been carried out on various TBM equipment under complex rock conditions.

Disc Cutter Types

Product Parameter

Cutter Structure Chart

We can provide a set of disc cutter accessories & parts, also can customize the knife box, knife holder, bucket teeth and other accessories for the customer's disc cutter.

Assembly process and quality control

The assembly process is a very important part of disc cutter quality control. For different geology, in addition to the targeted selection of cutters with different properties, the setting of cutter parameters (starting torque, airtight test pressure, etc.) also greatly affects the cutter performance.

Adjustment of bearing preload

According to the technical requirements of the bearing TIMKEN manufacturer, to make the bearing reach the rated load carrying capacity, the bearing must be pre-tightened at -0.02 ~ -0.04mm (about 40N-M torque).

In order to achieve the designed load-bearing capacity of the cutter, the preload of the bearing must be strictly controlled in hard rock or composite formations (only part of the starting torque of the whole cutter), which is particularly important for hard rock formations. For hard rock geology, our disc cutter reduces the starting torque of the whole tool under the premise of satisfying the preload of the bearing and ensuring the tightness, and try to avoid the uneven wear caused by the cutter not turning due to excessive starting torque.

Airtight test

For the groundwater-rich and soft rock zone, the sealing requirements of the cutter are higher, the test pressure is increased to 4Bar, and the time is extended to 30Min.

In addition to strictly controlling the starting torque and sealing test of the cutter, we have to check the height of the disc cutter, the welding quality of each welding point, and the tightening degree of each thread after each disc cutter is assembled to ensure the performance of the cutter.

Cutting Tool Packaging

Cutters are packed in a solid plywood box, which complies with national packaging regulations. It meets the needs of transportation, handling, moisture-proof, rain-proof, and rust-proof. It can ensure that the goods arrive at the site in a safe and non-destructive manner.