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20 Inch TBM Cutter For Rock Breaking

Litian Heavy Industry Machinery Co., Ltd.

20 Inch TBM Cutter For Rock Breaking

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Brand Name : Litian Heavy Industry

Certification : ISO9001:2015

Place of Origin : China

MOQ : Negotiable

Price : Negotiable

Payment Terms : T/T, D/P, L/C, Western Union, MoneyGram

Supply Ability : According to order quantity

Delivery Time : 3-30 days

Packaging Details : Plywooden cases

Material : Mold Steel

Cutter Type : Single,Double,Center, Eccentric

Size : 12, 13, 15.5, 17, 18, 19, 20 inch

Application : Mining Machine Accessory

Useage : Rock Breaking

Custom Design : Size, Color Can Be Customized

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TBM Disc Cutter For Rock Breaking

Litian heavy industry has a complete technical team of TBM cutting tool developing, design, manufacturing, assembly, debugging, maintenance and renovation, able to provide equipment selection consulting, independent design, development, manufacturing and professional after-sales service, its testing and manufacturing level has been among the world's advanced ranks. We work closely with users to help them improve excavation efficiency and reduce comprehensive cost, and become a reliable partner for users.

Disc Cutter Types

20 Inch TBM Cutter For Rock Breaking

The single disc cutter is installed near the edge of the front of the cutter head. It is mostly used to crush hard rock with high uniaxial compressive strength, and is a key component of breaking rock in tunneling.

20 Inch TBM Cutter For Rock Breaking

The double disc cutter is installed near the edge of the front of the cutter head, and is mostly used to crush soft rock with low uniaxial compressive strength.

20 Inch TBM Cutter For Rock Breaking

The center disc cutter is installed in the middle of the cutter head.

20 Inch TBM Cutter For Rock Breaking

The cutter ring of eccentric disc cutter is inclined to one side of the cutter hub, and it is installed near the edge of the front of cutter head.

Product Parameter

Cutter type Diameter

Bearing Capacity

(Tonne)

Cutter Ring
inch mm

Single / Double / Eccentric

Disc Cutter

12" 305mm 16 Optional
15.5" 394mm 22 Optional
17" 432mm 28 Optional
18" 457mm 28 Optional
19" 483mm 40 Optional
20" 508mm 40 Optional
Center Disc Cutter 13" 330mm 40 Optional
15.5" 394mm 45 Optional
17" 432mm 45 Optional
18" 457mm 42 Optional

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.

20 Inch TBM Cutter For Rock Breaking

20 Inch TBM Cutter For Rock Breaking 20 Inch TBM Cutter For Rock Breaking


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