What is the minimum order quantity?

The minimum order quantity is 100 pieces.

Do you offer OEM/ODM services?

Yes, we provide OEM and ODM services including customization from samples and designs.

How are the products packed?

Each core drill bit is packed in a plastic box, then placed in an export standard carton with a gross weight limit of 15-20kg.

Stone Core Bits 25mm Diamond Drill Bits for Stone

Name: Stone Core Bits 25mm Diamond Drill Bits for Stone
Brand: Johnson Tools Manufactory Co., Ltd.
SKU: 742310955

Jiangsu, ChinaJohnson Tools Manufactory Co., Ltd.

US$9.00-15.00

50 Pieces

Sample price:US$9.50/piece.Request sample

Product profile

Customized

Length

Jobber-length

Type

Core Drill Bit

Model NO.

15.2.2.1.10

Material

Diamond

Usage

Well Drilling, Masonry Drilling

Manufacturing Arts

Welding

Kind

Diamond Drill

Graininess

30#/40

Saw Blade External Diameter

25.4mm

Diameter

25.4mm

Thread Size

3/8" Shaft Without Thread.

Transport Package

Carton

Specification

Trademark

Johnsontool

Origin

China

HS Code

82075010

Production Capacity

1000PCS/Month

Key features

SGS & MPA Certified: Products certified by SGS and MPA with over 20 years of production experience.

Global Export Reach: Exporting to over 70 countries with strong worldwide client approval.

Fast Drilling Performance: Premium grade bits deliver fast drilling speed and extended product life.

Customizable Sizes: Size can be customized according to specific customer requirements.

Versatile Applications: Suitable for granite, marble, sandstone, limestone, and concrete drilling.

Silver Welded Technology: Advanced silver welding processing technology ensures durability.

Crown Segment Design: Features crown segment type for efficient stone drilling operations.

Flexible Delivery Options: Shipped via sea, air, courier, or land with 15-30 day lead times.

Company profile

Years of Export ExperiencePatents AwardedFast DeliveryOEM Services

Johnson Tools Manufactory Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 17 Years CertifiedNearest Port: Shanghai Port, Ningbo, QingdaoAverage Response Time: ≤3.65h

AI-Powered supplier vetting

SummaryThe supplier provides OEM and ODM services and supports extensive customization, including sample-, design-, full-, minor-, and flexible customization. It has 17 years of export experience, self-managed import/export rights, 90% export sales, and accepts multiple trade and payment terms. Production is conducted on one line, supported by 11–20 quality-control staff and stated advanced equipment and checking systems. However, no management-system certifications, SDK, new products in the past year, overseas service facilities, or offline trade-show participation are reported. Service procedures and complaint handling lack written records, and production batches are not continuously reconciled. Financial and cash-flow evidence is limited to year labels, so financial credibility cannot be conclusively assessed.

Supplier typeThe supplier is an OEM/ODM manufacturer with its own factory location, one production line, stated production output, advanced equipment, and a technical workforce. It also provides export services directly through self-managed import/export rights, indicating a manufacturing-oriented supplier rather than a pure trading intermediary.

CertificationsThe supplier’s certification of management systems is explicitly listed as NIL. This is a stated absence of certification evidence and represents a deficiency for this field.

After-Sales capabilityThe supplier has a complaint-handling procedure, but no written records, and it lacks written service-assessment and corrective/preventive-action procedures or records. It also reports no overseas warehouses, showrooms, agents, branches, or offline trade-show participation, limiting documented overseas service support.

R&D capabilityThe supplier provides ODM and broad design customization, but reports no available SDK and no new products during the past year. These explicit limitations outweigh the design-service evidence when assessing demonstrated recent innovation capability.

Production capacityThe supplier reports one production line, 11–20 quality-control staff, advanced production and checking equipment, and flexible export fulfillment with one-month lead times in both peak and off-season. However, it does not continuously reconcile quantities for each batch or mass production, so production controls are not fully documented.

Customization capabilityThe supplier explicitly supports customization from samples, customization from designs, full customization, minor customization, and flexible customization, and also offers ODM services. This is strong direct evidence of broad customization capability.

Product Q&A

Q:How to place an order?

Tell us your demand including product type, size, specification, material, machine HP, quantity, and nearest airport/seaport. We will then provide a best offer and Performa Invoice.

Q:What is the delivery time?

If steel body is in stock, shipment is around 15 days. Otherwise, it usually takes 20-30 days.

Q:What are the payment terms?

We accept T/T, Irrevocable L/C at sight, PayPal, Western Union, and Credit Card.

Q:Can the size be customized?

Yes, size can be customized according to customer requirements.

Q:What materials can these bits drill?

They are designed for stone drilling applications including granite, marble, sandstone, limestone, and concrete.