What is the maximum drilling depth?

The maximum drilling depth can reach up to 50 times the diameter (50D) for specific models.

Are standard sizes in stock?

Yes, we offer a wide range of standard internal coolant drills in various specifications with immediate delivery options.

Wholesale HRC55 Straight Shank Piloted Solid Carbide Inner Coolant Long Twist Drill Bit

Name: Wholesale HRC55 Straight Shank Piloted Solid Carbide Inner Coolant Long Twist Drill Bit
Brand: CHANGZHOU DELEVEL TOOLS CO., LTD.
SKU: 2176591795

Jiangsu, ChinaCHANGZHOU DELEVEL TOOLS CO., LTD.

US$6.80-198.00

5 Pieces

Sample price:US$10.80/piece.Request sample

Product profile

Customization

Available

Customized

Standard

GB/T

Model NO.

RDM

Length

80-525mm

Type

Deep-Hole Carbide Internal Cooling Drill

Material

Tungsten Carbide

Usage

Metal Drilling

Drilling Depth

Maximum Drilling Depth 50xd,etc.

Tolerance Class

0.005-0.02mm

Drill Point Angle

118-140

Runout

0.01-0.02mm

Coating

Tialn,Alcr,Tisin,Altin or Dlc

Application

Deep Hole Drilling,Through-Hole Drilling, etc.

Coolant Type

Internal Coolant or External Coolant

Transport Package

Single Package

Specification

Dia. 3-Dia. 20mm

Trademark

DELEVEL

Origin

Changzhou Jiangsu

HS Code

8207709000

Production Capacity

2000000/Year

Key features

Premium Raw Materials: 100% original carbide from Guhring, Kennametal, and Ceratizit, never recycled.

Advanced Coating Options: Available in TiAlN, AlCrN, TiSiN, AlCr-Blue, and DLC for superior wear resistance.

Efficient Internal Cooling: Internal coolant system minimizes heat buildup and optimizes chip evacuation.

High Hardness & Durability: HRC55 solid carbide construction ensures exceptional impact and wear resistance.

Wide Standard Range: Stock available for diameters D3-D25mm with lengths from 3D to 50D.

Custom Solutions: Non-standard drills available based on customer drawings or samples.

Fast Delivery: Standard models in stock; peak/off-season lead time within 15 workdays.

Professional Manufacturer: 15+ years experience with 100% on-time delivery commitment.

Company profile

CHANGZHOU DELEVEL TOOLS CO., LTD.

Jiangsu, China

Business Type: Manufacturer/FactoryAverage Response Time: ≤1.35hTerms of Payment: LC, T/T, Western UnionInternational Commercial Terms(Incoterms): FOB, EXW, CIF

AI-Powered supplier vetting

SummaryCHANGZHOU DELEVEL TOOLS CO., LTD. is a China-based manufacturer/factory specializing in carbide drills, end mills, threading tools, modular tooling, and custom carbide tools. It reports ISO 9001 certification, more than 12 years of carbide-tooling experience, six production lines, six-to-ten R&D engineers, six-to-ten quality-control staff, and annual carbide end-mill output of 600,000 pieces. The supplier supports multiple customization modes, ODM, and OEM services for well-known brands, and reports inventory capability and off-peak lead times within 15 working days. However, written corrective-action and complaint-handling procedures are absent, overseas service infrastructure is limited, and the validity of manufacturing-capacity contracts and quality-assurance status is unknown. Financial-capacity entries are present for 2023–2025, but no sufficient non-monetary evidence establishes financial strength. Customer cases are not specifically documented.

Supplier typeThe supplier is explicitly identified as a Manufacturer/Factory and a limited company in China. Its listed products and business scope cover carbide and other metal tooling, consistent with a direct manufacturing supplier.

CertificationsThe supplier reports holding ISO 9001 certification for its management system. This is explicit evidence of a formal quality-management certification, although the slices do not provide certificate validity or scope details.

After-Sales capabilityThe supplier has no written procedures or records for corrective and preventive actions or effective complaint handling. It has inventory capability, but no overseas warehouse, showroom, agents, or branches; therefore, the documented after-sales framework is deficient despite some fulfillment support.

R&D capabilityThe supplier reports new products during the past year, ODM availability, and six-to-ten R&D engineers with total R&D experience stated at six-to-ten years. It lacks an available SDK, but the documented product-development and ODM activity supports innovation capability overall.

Production capacityThe supplier operates six production lines, reports 600,000 carbide end mills produced annually, employs six-to-ten quality-control staff, and states off-peak lead times within 15 working days. Inventory capability and a claimed on-time-delivery record further support production execution, although contract status and quality-assurance status remain unknown.

Customization capabilityThe supplier explicitly offers customization from samples, designs, full and minor customization, flexible customization, ODM services, and custom carbide tools. Its stated specialization in non-standard carbide tools and technical support directly supports strong customization capability.