What is the hardness range of the drill bits?

The hardness ranges from HRC 45 to HRC 65.

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3D/5D Carbide Twist Drill Bit with Internal Cooling for Stainless Steel

Name: 3D/5D Carbide Twist Drill Bit with Internal Cooling for Stainless Steel
Brand: CHANGZHOU WEIYU TOOLS FACTORY
SKU: 2053914242

Jiangsu, ChinaCHANGZHOU WEIYU TOOLS FACTORY

US$3.40

5-19 Pieces

US$3.21

20-49 Pieces

US$3.02

50+ Pieces

Sample price:US$5.00/piece.Request sample

Product profile

Customization

Available

Customized

Standard

China

Model NO.

Carbide Twist Drill Bit

Length

Taper-length

Type

Twist Drill Bit

Material

Tungsten Carbide

Usage

Wood Drilling, Well Drilling, Metal Drilling

Over All Length

38-330mm

Precision

0.005~-0.01mm

Transport Packing

Each Piece with Plastic Box in Carton

Flute Diameter

0.3-40mm

HRC

45/55/60/65HRC

Controlling Mode

CNC Tooling System

Finish Surface

Plain Surface, The Side, Socket

Transport Package

Carton Packing

Specification

Multiple specifications

Trademark

WEIYU

Origin

China

HS Code

8207709000

Production Capacity

5000 Piece/Pieces Per Mouth

Key features

High Hardness Material: Tungsten carbide with HRC 45-65 hardness for durability.

Internal Cooling Design: 3D/5D twist drill bit with internal cooling for stainless steel.

Customizable Dimensions: Overall length 38-330mm and flute diameter 0.3-40mm available.

Advanced Coating Options: AlTiN, TiAlN, TiSiN, DLC, and Diamond coatings available.

OEM/ODM Services: Full customization, minor customization, and design-based options.

Versatile Application: Suitable for copper, cast iron, steel, titanium, and heat-treated steel.

Fast Delivery Time: Standard delivery within 3-5 days for most orders.

Company profile

High Repeat Buyers ChoiceExhibition Experience

CHANGZHOU WEIYU TOOLS FACTORY

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: 1 Year CertifiedNearest Port: Shanghai PortAverage Response Time: ≤24h

AI-Powered supplier vetting

SummaryCHANGZHOU WEIYU TOOLS FACTORY is a China-based limited company established in 2004 with 18 employees and one production line. It supplies carbide end mills and carbide drills, reporting annual output of 40,000 solid carbide end mills and 30,000 carbide drills. The supplier states that it has ISO9001 quality management system certification and nearly 20 years of cutting-tool design and manufacturing experience. It supports extensive customization and OEM services for popular brands. However, quality-control resources and documentation appear limited: it reports fewer than five quality-control staff, one inspector, no quality assurance, and inspection, corrective-action, and complaint procedures without written records. Export experience is limited to one year, with exports representing 1%–10% of sales. Financial, environmental, fire-drill, customer-case, and SDK evidence is insufficient for a positive assessment.

Supplier typeThe supplier is CHANGZHOU WEIYU TOOLS FACTORY, a China-based limited company established in 2004, operating independently rather than as part of a larger group. Its stated product scope is carbide end mills and carbide drills, with a broader description covering precision and customized cutting tools.

CertificationsThe supplier states that it has passed ISO9001 quality management system certification. However, another slice explicitly reports no quality assurance in quality-control processes, so the available evidence supports certification holding but also indicates weaknesses in implementation or documentation.

Production capacityThe supplier operates one production line with 18 total employees and reports annual output of 40,000 solid carbide end mills and 30,000 carbide drills. Its listed equipment covers CNC machining, grinding, laser marking, lathing, and notch grinding. Capacity controls are limited because it does not conduct ongoing batch quantity reconciliation and has no outsourcing SOP.

Customization capabilityThe supplier explicitly supports customization from samples, designs, full customization, minor customization, and flexible customization. Its product description also identifies specially customized cutting tools, providing direct evidence of broad customization capability.