What is the typical delivery time?

The standard delivery time is within 3-7 days. During peak seasons, lead time may extend to 1-3 months.

What materials can this drill bit handle?

It is suitable for drilling granite, marble, hard tiles, hard porcelain, ceramics, and concrete.

What payment methods are accepted?

We accept LC, T/T, PayPal, Western Union, and Money Gram for payments.

25MM Diamond Tool Core Drill Bit for Drilling Granite Marble Tile

Name: 25MM Diamond Tool Core Drill Bit for Drilling Granite Marble Tile
Brand: SINO ZHENG INDUSTRIAL INC.
SKU: 2060610165

Henan, ChinaSINO ZHENG INDUSTRIAL INC.

US$1.00-150.00

1 Piece

Sample price:US$1.00/piece.Request sample

Product profile

Customization

Available

Blade Type

Circle

Manufacturing Process

Electroplating

Model NO.

BSD-D1

Application

Concrete

Size

6-178mm

Character

Sharp

Delivery

3-7days

Sample

Free

Material

Diamond

Segment

Customizable

Transport Package

Carton

Trademark

BOSDI

Origin

China

HS Code

8202391000

Production Capacity

5000PCS/Day

Key features

Customizable Size Range: Available in sizes from 6mm to 178mm to meet specific project needs.

Vacuum Brazed Technology: Dry drilling capability with superior durability compared to electroplated bits.

Extended Service Life: Lasts significantly longer than electroplated bits, especially in wet conditions.

Wet and Dry Versatility: Designed with cooling slots for easier core removal and versatile application.

Self-Sharpening Design: Maintains sharpness automatically, particularly effective for sizes 6mm-14mm.

Smooth Drilling Performance: Protective diamond strips on the shank ensure smoother operation and improved life.

Free Sample Availability: Customers can request free samples to test quality before placing orders.

Fast Delivery Time: Standard delivery within 3-7 days for efficient project scheduling.

Company profile

Importers and ExportersFast DeliveryR&D Capabilities

SINO ZHENG INDUSTRIAL INC.

Henan, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2015-05-25Nearest Port: ZHENGZHOU, QINGDAO, SHANGHAIAverage Response Time: ≤7.04hTerms of Payment: LC, T/T, PayPal, etc.International Commercial Terms(Incoterms): FOB, CFR, CIF, CPT, EXW

AI-Powered supplier vetting

SummarySINO ZHENG INDUSTRIAL INC. is identified as both a trading company and manufacturer/factory in China, offering magnesium wheels, welding wire, heatsinks, anodes, plates, and related products. It reports ISO 9001 and ISO 14001 certifications, more than 10 production lines, 6–10 R&D engineers, and 6–10 quality-control staff. Export activity is established, with 71%–90% of sales from exports, self-operated import/export rights, exports beginning in 2015, and markets across the Americas, Europe, and Southeast Asia. Product descriptions and company information indicate technical expertise in magnesium materials and welding processes. However, overseas service infrastructure, 3D design, OEM/ODM, after-sales capability, and customization are not sufficiently documented. The audit record identifies BV, but the stated evaluation result is 0, which should be treated cautiously.

Supplier typeThe supplier is explicitly classified as both a Trading Company and Manufacturer/Factory, indicating combined commercial and manufacturing functions. Its listed product portfolio is centered on magnesium products.

CertificationsThe supplier lists ISO 9001 and ISO 14001 management-system certifications. A BV audit is also recorded with validity from September 10, 2025 to September 9, 2026, but the audit evaluation result is stated as 0, so the audit outcome itself does not provide positive assurance.

R&D capabilityThe company describes technological, product, and process innovation, including a one-time extrusion process for 1.2 mm magnesium welding wire and efforts to expand magnesium applications. It also reports 6–10 R&D engineers, but 3D design, new-product development status, ODM, and OEM capabilities are marked unknown.

Production capacityThe supplier reports more than 10 production lines, 6–10 quality-control staff, and stated output for magnesium welding wire and forged magnesium wheels. It also reports off-peak lead times within 15 working days and peak-season fulfillment of 2–3 months, supporting an established production operation, although the production figures should be interpreted as self-reported.

Client casesTwo records identify the same buyer, CÔNG TY CỔ PHẦN HUY MINH, associated with specified cathodic-protection alloy products imported into Vietnam. These records provide evidence of an associated buyer and product transactions, but they do not establish the scale, duration, performance, or breadth of customer references.

Product Q&A

Q:Can this drill bit be used for dry drilling?

Yes, the vacuum brazed dry drill bits are specifically designed for dry drilling of granites, marble, hard tiles, and ceramics.

Q:What is the difference between wet and dry usage?

While it works in both conditions, performance is much better in wet conditions, and the service life is significantly longer compared to electroplated bits.

Q:Are the sizes customizable?

Yes, the size is customizable, with options ranging from 6mm to 178mm to suit various drilling requirements.

Q:Does the drill bit require cooling?

It features a cooling slots design for easier core removal when stuck. It is also self-cooling and self-sharpening for sizes 6mm-14mm.

Q:Is it possible to get a sample before ordering?

Yes, free samples are available for customers to test the product quality before making a purchase.