What are the payment terms?

Payment terms include 30% advance and 70% balance, as well as T/T, LC, D/P, PayPal, Western Union, and small-amount payments.

Does the supplier offer free samples?

Yes, the supplier provides free sample costs and free testing of product quality for customers.

What is the lead time for bulk orders?

Bulk order time is typically 20-25 days, with peak and off-season lead times of one month.

Good Quality Nx Diamond Core Drill Bits

Name: Good Quality Nx Diamond Core Drill Bits
Brand: DONGYAN INTERNATIONAL CO., LTD.
SKU: 863067155

Jiangsu, ChinaDONGYAN INTERNATIONAL CO., LTD.

US$3.20

50-199 Pieces

US$3.00

200-499 Pieces

US$2.95

500+ Pieces

Sample price:US$3.50/piece.Request sample

Product profile

Customization

Available

Customized

Standard

ISO2000:9001

Model NO.

DY-01

Length

60mm or Customize

Type

Core Drill Bit

Material

Diamond

Usage

Metal Drilling, Masonry Drilling, Ceramic Tiles

Advantage

Fast Cutting Speed

Color

as Your Requirements

Sample Cost

Free

Sample Production Time

5-7days

Bulk Order Time

20-25days

Payment Term

30% Advance, 70% Balance

Industry Experience

8years

Certificate

MPa, BSCI

Transport Package

Blister Package, White Box

Specification

5-128mm

Trademark

Origin

Jiangsu Province, China

HS Code

8207191000

Production Capacity

100000/Month

Key features

High-Speed Drilling: Drills one hole in just 10 seconds with working speed of 6000-10000 RPM.

Extended Durability: Vacuum brazed technology offers 10 times longer life than electroplated tools.

Versatile Application: Ideal for ceramic, porcelain, granite, marble, glass, quartz, and tiles.

Customizable Options: Length, color, and special designs are available upon request.

Free Sample Service: Free sample cost and free testing of product quality for customers.

Quality Assurance: Strictly conforms to ISO9001-2000 quality control and EN standards.

Dry/Wet Usage: Supports both dry and wet drilling operations for flexibility.

Experienced Supplier: Factory established in 1980s with over 20 years of industry experience.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceYears of Export ExperienceExhibition Experience

DONGYAN INTERNATIONAL CO., LTD.

Jiangsu, China

CertifiedBusiness Type: Trading Company CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 14 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤8.11h CertifiedTerms of Payment: T/T, LC, D/P, etc.

AI-Powered supplier vetting

SummaryThe supplier is a small trading company in Wuxi, China, focused on hardware tools and related product sales. It has five employees, one R&D engineer, no cooperative suppliers reported, and no stated manufacturing capability. Customization is offered across samples, designs, full and minor customization, and the company reported new products during the past year, but it does not provide ODM services or OEM services for popular brands and has no available SDK. Service procedures, complaint handling, and corrective/preventive-action procedures are documented with follow-up records, although the approved-supplier list lacks approval signatures or dates. An audit by TUV Rheinland is reported as valid from June 30, 2026 to June 29, 2027, but the evaluation result is recorded as 0 without interpretation. Quality-assurance and traceability status are unknown, and no quality-control test equipment is reported. Financial records are indicated for 2023–2025, but no financial performance conclusion is possible from...

Supplier typeThe supplier is explicitly identified as a trading company and limited company located in Wuxi, China, with five employees and no reported affiliation with a larger group. Its stated activities center on sales and wholesale of hardware tools, machinery, hardware and electrical appliances, construction materials, and related goods, indicating a small independent trading profile rather than a manufacturing entity.

After-Sales capabilityThe supplier has a documented service-capability assessment procedure with follow-up records, a corrective and preventive action procedure with records, and a clear customer-complaint procedure with follow-up records. However, the approved-supplier list lacks approval signatures or dates; this does not directly negate complaint or service handling, but it indicates an administrative control weakness.

R&D capabilityThe supplier reports at least one new product during the past year and has one R&D engineer, supporting some product-development activity. Nevertheless, it has no available SDK, does not provide ODM services, and the limited staffing indicates only modest documented R&D capacity rather than a strong innovation platform.

Customization capabilityThe supplier explicitly offers customization from samples, designs, full customization, minor customization, and flexible customization. It also reports new products during the past year, although no ODM service, SDK, or detailed engineering resources beyond one R&D engineer are available.

Product Q&A

Q:What materials can this diamond core drill bit be used on?

It is designed for high-speed use on ceramic, porcelain, granite, marble, glass, quartz, limestone, fiberglass, terracotta, terrazzo, quarry, and vitrified tiles.

Q:How long is the lifespan compared to other tools?

The vacuum brazed diamond core drill bit has a life span 10 times longer than electroplated tools.

Q:What is the drilling speed and time per hole?

The working speed is 6000-10000 RPM, and it can drill one hole in just 10 seconds.

Q:Can the product be customized?

Yes, length, color, and special applications/designs are available upon request.

Q:What is the minimum order quantity?

The minimum order quantity is 10 pieces.