What is the hardness range of the drill bits?

The hardness ranges from HRC45 to HRC65, including HRC45, HRC55, HRC58, HRC60, and HRC65.

What coatings are available for these tools?

Available coatings include AlTiN, TiAlN, TiAISI, TiSiN, TiN, DLC, Nano, and Diamond.

What is the minimum order quantity?

The Minimum Order Quantity is 10 Pcs.

New Design Spiral Flute Long Type Twist Drill Bits for Deep Hole

Name: New Design Spiral Flute Long Type Twist Drill Bits for Deep Hole
Brand: CHANGZHOU AITEFASI TOOLS CO., LTD.
SKU: 882704315

Jiangsu, ChinaCHANGZHOU AITEFASI TOOLS CO., LTD.

US$10.04

2-29 Pieces

US$9.54

30-49 Pieces

US$9.04

50-99 Pieces

US$8.84

100+ Pieces

Sample price:US$10.00/piece.Request sample

Product profile

Customization

Available

Length

38-330mm

Type

Twist Drill Bit

Model NO.

eitfs3555

Material

Tungsten Cobalt Alloy, Tungsten Carbide

Usage

Wood Drilling, Well Drilling, PCB Drilling, Metal Drilling, Masonry Drilling

Flute Diameter

0.3-40mm

Dia Size

4mm-40mm

Precision

0.005~-0.01mm

Over All Length

38-330mm

HRC

45/55/60/65HRC

Flute

2/3

Suitable for

Coper.Cast Iron.Carbon Steel.Mould Steel

Controlling Mode

CNC System

Use

Metal Drilling

Transport Package

1PCS Per Plastic Tube, 10PCS Per Group

Specification

Customers Requirements

Trademark

eitfs

Origin

China

Production Capacity

3000 Piece/Pieces Per Month

Key features

High Hardness Options: Available in HRC45, HRC55, HRC58, HRC60, and HRC65 for diverse material needs.

Advanced Coating Tech: Features AlTiN, TiAlN, TiSiN, DLC, Nano, and Diamond coatings for durability.

Enhanced Chip Breaking: Special designed drill tip increases centering ability and chip breaker efficiency.

Wide Customization: Supports full customization including flute diameter, length, and precision specs.

High Precision Quality: Precision tolerance of 0.005 to -0.01mm ensures accurate deep hole drilling.

Heat-Resistant Coating: HELICA/ALTIN coating allows for high-speed processing with perfect oxidation resistance.

Sharp Cutting Edge: Sharper edges decrease cutting resistance and torque, extending tool and machine life.

Smooth Flute Design: Smooth and wide flute structure removes cuttings easily, improving lathe efficiency.

Company profile

Management CertificationR&D CapabilitiesIn-stock Capacity

CHANGZHOU AITEFASI TOOLS 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: 10 years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤6.36h

AI-Powered supplier vetting

SummaryThe supplier demonstrates broad customization, ODM capability, recent product development, OEM experience for recognized brands, and quality assurance supported by ISO9001:2015 certification. It reports inventory capability, participation in EMO Hannover, two production lines, annual cutting-tool output of 1,500,000 pieces, and export coverage across East Asia, Europe, Australia, North America, and domestic markets. However, several management controls are incompletely documented: corrective-action, complaint-handling, supplier assessment, and manufacturing-capacity procedures reportedly lack records. The supplier has no overseas agents, branches, warehouse, or showroom, lacks an environmental impact assessment report and SDK, and has no valid manufacturing contract with affiliated subcontractors. Financial information is insufficient for a reliable credibility assessment.

Supplier typeThe supplier appears to be a manufacturer serving domestic and international markets, with two production lines, stated cutting-tool output, inventory capability, and OEM/ODM service capability. It also uses or may rely on affiliated subcontractors, but no valid manufacturing contract with those subcontractors is reported.

CertificationsThe supplier reports an ISO9001:2015 certificate, providing explicit evidence of a quality-management certification. No other certification is identified in the provided information.

R&D capabilityThe supplier reports new products during the past year, provides ODM services, and supports multiple design-service modes. However, it has no available SDK, so its innovation offering is stronger in product development and design customization than in SDK-based integration.

Production capacityThe supplier reports inventory capability, two production lines, 1,500,000 pieces of annual cutting-tool output, and lead times within one month or within 15 workdays depending on the slice. Nevertheless, it lacks a valid contract with affiliated subcontractors, does not continuously reconcile production quantities, and has no outsourcing SOP.

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

Product Q&A

Q:What are the terms of payment?

T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you do the rest payment.

Q:What are your terms of delivery?

EXW, FOB, CFR, CIF, ETC.

Q:How about your delivery time?

Generally, It will take 10-15 days after receiving your advance payment. The specific delivery time depends on theitems and the quantity of your order.

Q:Do you provide samples? Is it free or extra?

Yes, we could offer our stock sample for free charge and you please pay the cost of freight. custom cutting tools negotiated then we will quote the best sample cost.

Q:What materials can these drill bits process?

They can process copper, cast iron, carbon steel, mould steel, stainless steel, titanium alloy, tool steel, and heat-treated steel.