Cutting Teeth/Inserts: Shank Diameter 12-45 mm

Component Specifications

Definition

Cutting teeth or inserts are precision-engineered, replaceable components mounted on rotary-percussive drill heads that perform the primary rock fragmentation function. These components transfer rotational torque and percussive impact energy from the drill rig to the rock face, creating fractures through a combination of shearing, crushing, and tensile failure mechanisms. They are strategically positioned on the drill head to optimize cutting patterns and ensure efficient material removal during drilling operations in mining, construction, and geotechnical applications.

Working Principle

Cutting teeth/inserts operate on the principle of concentrated stress application. As the drill head rotates and impacts the rock surface, the inserts concentrate mechanical energy at their carbide tips, exceeding the compressive and tensile strength of the rock. This creates microfractures that propagate and connect, resulting in chip formation and material removal. The geometry of the inserts (including attack angle, clearance angle, and tip shape) is designed to maximize stress concentration while minimizing friction and wear.

Materials

Tungsten carbide (WC-Co) with cobalt binder (6-12% Co), often with surface treatments like PVD/CVD coatings (TiN, TiCN, TiAlN) for enhanced wear resistance. Premium grades may include micrograin or ultrafine carbide structures for improved toughness.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Hardness	1300-1600 HV30
Insert Type	Button, Chisel, Cross, Conical
Carbide Grade	YG8, YG11C, K10-K40
Overall Length	25-80 mm
Shank Diameter	12-45 mm
Fracture Toughness	10-14 MPa·m¹/²
Recommended Rock Strength	50-300 MPa UCS
Operating Temperature Range	-40°C to 600°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 11148-6, DIN 8033, ISO 15641

Parent Products

This component is used in the following industrial products

Rotary-Percussive Drill Head

A drilling component that combines rotary and percussive actions to bore holes in rock formations.

View Product Details

Engineering Analysis

Risks & Mitigation

Catastrophic failure under excessive load
Ejection of broken fragments during operation
Reduced drilling efficiency from worn inserts
Damage to drill head from improper installation

FMEA Triads

Trigger: Excessive feed force or torque
Failure: Carbide tip fracture or complete insert breakage
Mitigation: Implement torque/feed monitoring systems, use inserts with appropriate toughness rating, follow manufacturer's load specifications

Trigger: Abrasive wear in hard rock formations
Failure: Gradual wear leading to flattened cutting profile and reduced penetration rate
Mitigation: Select inserts with wear-resistant coatings, optimize flushing to remove cuttings, implement regular inspection schedules

Trigger: Thermal cracking from inadequate cooling
Failure: Network of microcracks leading to premature fracture
Mitigation: Ensure proper water/air flushing flow rates, use inserts with thermal barrier coatings, avoid continuous drilling at maximum capacity

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Shank diameter: ±0.05mm, Overall length: ±0.5mm, Thread pitch: ISO 7-1 standards

Test Method

Rock abrasion testing per ASTM G65, impact testing per ISO 15641, metallurgical analysis per ASTM E384 for hardness, dimensional verification with CMM

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Cutting Teeth/Inserts

Manufacturer profiles associated with Cutting Teeth/Inserts.

Sourcing Cutting Teeth/Inserts from China?

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

How often should cutting teeth/inserts be replaced?

Replacement frequency depends on rock abrasiveness, drilling parameters, and insert quality. Typically, inserts last 100-500 meters of drilling in medium-hard rock. Monitor for visible wear (flattening >3mm), cracking, or reduced penetration rates.

What causes premature failure of drilling inserts?

Common causes include improper installation torque, drilling in excessively abrasive rock without adequate flushing, excessive feed pressure, thermal shock from inadequate coolant, and using inserts beyond their hardness/toughness rating for the application.

Can inserts from different manufacturers be mixed on the same drill head?

Not recommended. Different manufacturers use varying geometries, metallurgy, and quality standards. Mixing can create uneven load distribution, accelerated wear, and potential drill head damage. Always use matched sets from the same supplier.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Cutting Teeth/Inserts