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42mm Tapered 7, 11, 12 Degree Drill Bit for Granite Rock Drilling
US$3.70
100-1,999 Pieces
US$3.65
2,000-4,999 Pieces
US$3.60
5,000+ Pieces
Sample price:US$4.00/piece.Request sample
Product profile
Customization
AvailableCustomized
CustomizedLength
65mmModel NO.
chisel bitType
Chisel BitsMaterial
High Carbon SteelUsage
Well DrillingPower Type
PneumaticCondition
NewProcess
Heat TreatmentColor
Golden, Yellow, Customized.Transport Package
Wooden CaseSpecification
42mmTrademark
KaiyuOrigin
Taizhou, ZhejiangHS Code
8207199000Production Capacity
1000000 PCS Per MonthKey features
Customizable Color Options: Available in Golden, Yellow, and other customized colors to meet specific requirements.
High-Quality Material: Manufactured from 35CrMoNiV steel for superior durability and performance in harsh environments.
Wide Diameter Range: Available in diameters from 28mm to 50mm to suit various drilling applications.
48 Years Manufacturing Experience: Backed by nearly five decades of specialized expertise in drilling tools and spare parts.
High-Grade Tungsten Carbide: Equipped with high-grade tungsten carbide inserts for enhanced cutting efficiency and longevity.
ISO9001:2015 Certified: Production process certified under ISO9001:2015 standards ensuring consistent quality control.
OEM/ODM Services: Supports OEM and ODM services with 2 R&D engineers available for custom solutions.
Company profile

Business Type: Manufacturer/Factory, Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2004-06-01Nearest Port: NINGBO PORT, SHANGHAI PORTAverage Response Time: ≤9.64hTerms of Payment: LC, T/T, D/P, etc.
AI-Powered supplier vetting
SummaryKaiyu (Zhejiang) Drilling Tools Co., Ltd. is a China-based limited company identified as both a trading company and manufacturer/factory, specializing in rock-drilling products including button bits, DTH bits and hammers, drill rods, and drill pipes. It reports ISO 9001 certification, six production lines, experienced technical and R&D personnel, and a quality-control system. Stated annual capacities include 120,000 button bits, 60,000 DTH bits, and 6,000,000 chisel bits, with lead times of within 15 workdays in both off-peak and peak seasons. The supplier serves multiple global regions and has export capability through agents and self-operated import/export rights. However, the provided information does not substantiate after-sales service arrangements, financial credibility, product customization, or specific customer cases.
Supplier typeThe supplier is described as a trading company and also as a trading company/manufacturer or factory. Its legal form is a limited company located in Zhejiang, China, indicating a mixed commercial and manufacturing profile.
CertificationsThe supplier explicitly reports ISO 9001:2015 Quality Management System Certification and lists ISO 9001 under its management-system certifications. This supports the presence of a documented quality-management certification.
R&D capabilityThe supplier reports experienced and high-tech personnel, foreign equipment and technologies, unique techniques, specialized equipment, and R&D engineers with 6–10 years of experience. These statements support technical development capability, although no specific patented or newly developed products are identified.
Production capacityThe supplier reports six production lines, quality-control inspection, and annual capacities of 120,000 button bits, 60,000 DTH bits, and 6,000,000 chisel bits. It also states order fulfillment within 15 workdays during both peak and off-peak seasons, supporting a substantial and responsive production capability.
Product Q&A
Q:What is the warranty period?
A:
The provided product description does not specify a warranty period. Please contact the supplier directly for warranty details.
Q:What are the available payment terms?
A:
Payment can be made via T/T (Telegraphic Transfer), Western Union, L/C at sight, LC, D/P, or other standard international terms.
Q:What is the lead time for delivery?
A:
The average lead time is within 15 workdays for both peak and off-peak seasons.
Q:Can I customize the color of the drill bits?
A:
Yes, the product description explicitly states that colors such as Golden, Yellow, and other customized options are available.
Q:What materials are used for these drill bits?
A:
The drill bits are made from High Carbon Steel and specifically 35CrMoNiV material for high strength and wear resistance.
Send Inquiry
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Kaiyu (Zhejiang) Drilling Tools Co., Ltd
Kaiyu (Zhejiang) Drilling Tools Co., Ltd*Content:
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