Selection and supply support for disc cutters, scrapers, rippers and spares used in hard-rock TBMs, shield tunnelling, pipe jacking and microtunnelling. Review ground, cutter positions and mounting drawings before agreeing configuration and delivery.
A range of rock-breaking, cutting and wear components. Verify dimensions, materials, load capacity and pressure ratings against project information and approved drawings.
Breaks rock by rolling indentation. Match cutter position, mounting dimensions and allowable load.
Paired cutter rings for specified positions. Confirm spacing, shaft arrangement and mounting orientation against drawings.
Check external water pressure, seal ratings and lubrication requirements. Confirm any pressure-compensation mechanism from the product drawing.
Penetrates and loosens ground and assists break-up. Check tool projection, carbide layout and holder interfaces.
Face and gauge scrapers differ by mounting position. Check cutting direction, projection, carbide and steel body for each.
The ring contacts the rock and wears in service. Verify its bore, outer diameter, tip width and fit to the cutter body against the drawing.
Match bolts, nuts and washers to mounting drawings. Verify dimensions, property class, finish and the specified tightening method.
Wear liners and protection blocks reduce wear on cutterhead structures. Check material, thickness, attachment and replacement clearance for each protected area.
Product appearance identifies the family; supplied configuration, performance and interchangeability follow the agreed technical documentation.
The cutterhead carries each cutter across the face, while contact drives rotation about its own shaft. Thrust is concentrated through the ring to produce crushing, cracks and chips.
24-second explainer · 1080p · Chinese / English subtitles · Engineering schematic, not a simulation
Normal force concentrates at the cutter edge, forming a local crushed zone.
Continued rolling and successive loading of adjacent tracks extend cracks into the rock and towards neighbouring grooves.
Connected cracks allow rock chips to detach between tracks. Cutter spacing and penetration must be considered together.
Technical reference: Frontiers in Earth Science (2023), disc-cutter rock-breaking study ↗
Explore cutter construction and cutterhead arrangements in documented photographs. Select an image to view it in high resolution.
Fort Wayne, Indiana, USA, 2018. Disc cutters occupy different radial positions, with distinct arrangements and mounting orientations at the centre and perimeter.
Photographed at the tunnel exhibition in Förslöv, Sweden, in 2013. The component photograph shows the ring and assembly, complementing the cutterhead view.
Official videos open on the source website; availability depends on your network. The explainer above plays directly on this site.
Find guidance on rock breaking, mounting interfaces, wear records and procurement acceptance, organised around engineering questions.
Thrust presses the cutter ring into the rock as the cutterhead rotates. Cracks develop beneath adjacent tracks and can connect to release chips. Rock strength, joints, cutter spacing and penetration jointly influence excavation.
Review spacing, penetration and chip characteristics rather than judging performance from rotational speed alone.
Interpretation limit: Fine muck alone does not establish cutter-ring wear as the cause.
Add to enquiry draft ↗Disc cutters primarily break rock by rolling indentation. Scrapers cut soft or loosened material; rippers penetrate and loosen ground. Mixed-ground cutterheads may combine tool types according to the machine design.
Identify the ground and cutter-position function before confirming the tool designation and supply drawing.
Interpretation limit: Similar names do not establish the same cutting action or interface.
Add to enquiry draft ↗Uniaxial compressive strength (UCS) describes intact-rock compressive strength, not abrasivity or rock-mass integrity. Review abrasivity tests, mineralogy, joint spacing, groundwater and mixed-face conditions, with sample representativeness.
Provide the geotechnical report, sampling locations and test methods; avoid comparing unlike measurements.
Interpretation limit: Strength and abrasivity must be assessed separately.
Add to enquiry draft ↗Larger cutters require compatible mounting space, structure and drive capacity. Diameter must be considered alongside machine thrust, individual cutter load, spacing and cutterhead geometry. Replacement selection also requires projection and clearance checks.
Matching nominal size does not establish interchangeability; use controlled drawings and an interface checklist.
Interpretation limit: Equal nominal diameter does not prove interchangeability.
Add to enquiry draft ↗Centre positions have limited space and different rolling conditions from outer positions. Gauge positions affect the excavation profile and involve mounting inclination and lateral loading. Wear can differ by position for the same cutter model.
Record position numbers and mounting angles; analyse life by cutter position.
Interpretation limit: Centre and gauge operating conditions are not equivalent.
Add to enquiry draft ↗Pipe jacking advances pipes by jacking; microtunnelling typically uses a remotely controlled excavation system. Select tools against excavation diameter, ground, cutterhead layout, crushing and muck transport, and maintenance access.
Supply the machine model, cutterhead drawing and expected geological profile.
Interpretation limit: Pipe jacking alone does not determine tool type.
Add to enquiry draft ↗Transitions between hard and soft ground can cause fluctuating and impact loads. Review rock distribution, boulders, joints and soil properties when selecting tool combinations, projection and protection. Operating adjustments must follow machine and project procedures.
Correlate ground transitions with damage records to identify recurring position-specific problems.
Interpretation limit: Lower rotational speed does not resolve every impact-damage mechanism.
Add to enquiry draft ↗Specify working pressure, pressure variation, medium and temperature. Check seals, whether pressure compensation is provided and how, lubrication and validation records. A high-pressure label is not a substitute for a verifiable rating.
Request the applicable pressure rating and test basis; pressurised interventions require separate project procedures.
Interpretation limit: Pressure capability does not establish an internal compensation mechanism.
Add to enquiry draft ↗Record uniform radial wear, one-sided wear, flat spots and chipping separately. Include position, orientation and a scale in photographs, plus advance, geology and operating data. A single photograph rarely establishes a unique cause.
Compare measurements with manufacturer discard limits; visual appearance cannot replace dimensional inspection.
Interpretation limit: One image records a condition and rarely establishes the root cause.
Add to enquiry draft ↗Seal failure may admit abrasive material and affect bearings and lubrication. Abnormal rotation may accompany heat or irregular wear. Review leakage, rotation, lubrication and inspection findings together rather than attributing every failure to ring material.
Follow manufacturer repair and discard procedures and retain component-to-batch traceability.
Interpretation limit: Bearing anomalies should not automatically be attributed to ring steel.
Add to enquiry draft ↗Replacement decisions consider wear limits, abnormal damage, remaining geology, maintenance access and project risk assessment. Accumulated advance alone cannot define one replacement interval for every cutter position.
Maintain a position history with installation date, advance, inspection values, repairs and relocation records.
Interpretation limit: A uniform advance-based interval masks position differences.
Add to enquiry draft ↗Prepare machine and cutterhead information, tool and holder drawings, geology, pressure and operating conditions, quantities and delivery needs, and quality acceptance requirements. Identify missing information before proposing substitutions.
At minimum provide revision-controlled drawings, cutter positions and required quantities.
Interpretation limit: Mark missing information; do not assume compatibility.
Add to enquiry draft ↗Check shaft ends, clamping faces, locating dimensions, fasteners, ring projection and surrounding clearance. Align drawing units, datums, revisions and tolerances. Photographs assist identification but do not replace dimensioned drawings.
Complete interface checks before order placement and define responsibility for approving deviations.
Interpretation limit: Photographs cannot replace mounting dimensions and tolerances.
Add to enquiry draft ↗Consider purchase, freight, refurbishment, replacement labour, downtime and discard costs. Comparisons require equivalent ground, cutter positions and reporting periods. Cost per metre requires a consistent definition of advance and tool consumption.
Retain cost breakdowns and their scope; a single average life figure cannot replace a project estimate.
Interpretation limit: Cost per metre from different ground conditions is not directly comparable.
Add to enquiry draft ↗Check the order, drawing revision, model, quantity, condition, protective packaging and agreed quality documents. Review critical dimensions, material and test records against the contract. Item or batch identifiers should link to supply and inspection records.
Quarantine discrepancies, retain photographs and records, and release only after resolution.
Interpretation limit: Acceptable appearance does not replace contracted inspection.
Add to enquiry draft ↗Terms distinguish components, parameters and damage modes. Express penetration per revolution in mm/rev; confirm holder and housing names against the particular drawing.
Use machine drawing terminology for project-specific parts; distinguish cutterhead from cutter ring.
Interpretation limit: The same translated name may describe different manufacturer arrangements.
| Term | Meaning and use |
|---|---|
| Disc cutter盘形滚刀 | A cutter assembly that breaks rock by rolling indentation. |
| Cutter ring刀圈 | The annular wear component that contacts rock. |
| Cutter holder刀座 | The mounting component holding a cutter; naming follows the drawing. |
| Cutterhead刀盘 | The rotating structure carrying excavation tools. |
| Penetration per revolution每转贯入度 | Axial advance per cutterhead revolution, commonly mm/rev. |
| Cutter spacing刀间距 | Spacing of adjacent cutting tracks as defined in the design. |
| Abrasivity磨蚀性 | The ground’s tendency to wear tools. |
| Raise boring反井钻进 | A raise-excavation method using pilot drilling and reaming. |
| Single-disc cutter单刃滚刀 | A disc cutter fitted with one cutter ring. |
| Double-disc cutter双刃滚刀 | A two-ring arrangement; confirm shafts and assembly from drawings. |
| Centre cutter中心滚刀 | A disc cutter located near the cutterhead centre. |
| Gauge cutter边缘滚刀 | A disc cutter working at the excavation perimeter. |
| Face cutter正面滚刀 | A disc cutter located on the cutterhead face. |
| Face scraper正面刮刀 | A scraper mounted on the cutterhead face. |
| Gauge scraper边刮刀 | A scraper mounted around the cutterhead perimeter. |
| Ripper撕裂刀 | A cutting tool used to penetrate and loosen ground. |
| Cemented carbide硬质合金 | A hard material used in cutting or wear-resistant regions. |
| Tool projection刀具出露高度 | Tool extension from the specified mounting datum. |
| Cutter-ring tip width刀圈刃宽 | Width of the cutter ring’s cutting edge. |
| Normal force per cutter单刀法向载荷 | Force acting in the cutter indentation direction. |
| Cutterhead torque刀盘扭矩 | Torque driving cutterhead rotation. |
| Uniaxial compressive strength (UCS)单轴抗压强度 | Compressive strength of an intact rock specimen without lateral confinement. |
| Joint节理 | A rock discontinuity affecting fragmentation and rock-mass behaviour. |
| Mixed face复合掌子面 | An excavation face containing ground of differing properties. |
| Pressure compensation压力补偿 | A mechanism managing internal/external pressure differences; confirm its provision. |
| Bearing轴承 | A component supporting relative motion and transmitting loads. |
| Seal密封 | A component restricting lubricant loss and ingress of external media. |
| Fastener紧固件 | Bolts, nuts and other components used to join or secure parts. |
| Preload预紧力 | The initial clamping force applied during specified tightening. |
| Wear liner耐磨衬板 | A protective plate covering a surface exposed to wear. |
| Edge chipping崩刃 | Local loss of material from a cutting edge. |
| Flat wear / flat spot平面磨损 | A locally flattened wear area on a disc cutter. |
The same tool family can perform differently across cutter positions, ground conditions and operating regimes. Establish the application limits first.
Assess cutter configuration against strength, abrasivity, joints and cutter spacing.
Focus: rock breaking & loadingReview mixed-face transitions and boulders, tool combinations, projection and protection.
Focus: impact & irregular wearReview cutterhead space, muck removal and maintenance access to define tools and spares.
Focus: space & accessCheck tooling requirements for raise-boring reamers and shaft applications against the head design.
Focus: interfaces & dutyChuzhijiao underground cutting tools supports construction and procurement needs through product identification, technical-document checks and supply coordination.
Review machine, geology, cutter positions and project needs.
Confirm drawing revision, interfaces and operating conditions.
Agree supply scope, configuration, quantities, inspection documents and delivery dates.
Check packing lists and batch identifiers; record service and wear feedback.
Follow tunnelling projects, cutter technology and field applications. Each item links to its publishing source.
A technical paper on the coordinated design of digger shields and expandable segments for complex urban fill.
View project and technology details ↗A 5.6 m TBM is planned for a 1.5 km flood mitigation tunnel, illustrating a municipal infrastructure application.
View project and technology details ↗Explore the manufacturer’s remote cutter monitoring technology. Consult its original documentation for capabilities and configuration.
View project and technology details ↗Prepare machine, ground and tooling requirements and download an enquiry draft. Include drawing numbers and revisions; mark unknown values “to be confirmed”.