High Speed Steel HSS Double-Ended Twist Drill Bit

Name: High Speed Steel HSS Double-Ended Twist Drill Bit
Brand: Zhejiang ZhengCheng lmport & Export Co.,LTD
SKU: 1967698281

Zhejiang, ChinaZhejiang ZhengCheng lmport & Export Co.,LTD

US$0.19-1.25

50 Piece

Sample price:US$1.50/piece.Request sample

Product profile

Customization

Available

Customized

Standard

GB/T

Model NO.

HSS

Length

Standard Length

Type

Twist Drill Bit

Material

High Speed Steel

Usage

Metal Drilling

Application

Stainless Steel/Mold Steel/Copper Alloy...etc

Unit Price

Customized Support

OEM, ODM

Shank Type

Double-Ended Shank

Transport Package

Plastic Box or Your Requriement

Specification

According To The Order Requirements

Trademark

ZEICIN

Origin

China

HS Code

8207509000

Key features

Double-Ended Design: Features cutting points at both ends for extended tool life and reduced downtime.

Customizable Geometry: Flexible customization of helix angle, point angle, and flute length for specific needs.

Advanced Heat Treatment: Integrated quenching, cryogenic treatment, and tempering for hardness up to HRC 67.

Multiple Coating Options: Optional TiN, TiAlN, TiCN, or custom coatings for enhanced wear and heat resistance.

Wide Material Compatibility: Suitable for stainless steel, mold steel, copper, aluminum, cast iron, and plastics.

Optimized Chip Removal: Fine-tooth spiral design ensures effortless debris clearance from both ends.

High Fracture Resistance: Reinforced design and ultra-clean smelting prevent breakage in high-load applications.

Company profile

Zhejiang ZhengCheng lmport & Export Co.,LTD

Zhejiang, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2019-03-26Nearest Port: Ningbo Port, Shanghai PortAverage Response Time: ≤1.38hTerms of Payment: LC, T/T, PayPal, etc.International Commercial Terms(Incoterms): FOB, EXW, CIF

AI-Powered supplier vetting

SummaryThe supplier is a limited trading company with five employees, focused on steel raw materials, cutting tools, and plastic raw materials. It has self-operated import/export rights, six years of export experience, and exports reportedly account for 90% of total sales. The supplier offers OEM and ODM services, has introduced new products within the past year, and supports extensive customization from samples, designs, or full specifications. However, it has no available SDK, overseas showroom, overseas agents or branches, or offline trade-show participation. Service-management controls are weakly documented: no written corrective-action, complaint-handling, supplier-assessment procedures, or approved-supplier list were identified. Raw-material traceability, quality assurance, sustainability documentation, and fire-drill status remain unknown. A CTI audit record is provided for the period from 2025-05-10 to 2026-05-09, but the stated evaluation result is not interpretable without a defined scoring scale.

After-Sales capabilityThe supplier has no overseas showroom, agents, branches, or stated overseas service countries, and it has not participated in offline trade shows. It also lacks written complaint-handling and corrective/preventive-action procedures, while its service-capability assessment procedure has no written procedures or records, indicating limited documented after-sales infrastructure.

R&D capabilityThe supplier reports new products within the past year and offers ODM services, supporting some product-development capability. However, it reports no available SDK, so its innovation capability is evidenced for product development and design services but not for SDK-based technical integration.

Customization capabilityThe supplier explicitly provides customization from samples, customization from designs, full customization, minor customization, and flexible customization. These services are reported in multiple slices and directly demonstrate broad customization coverage.

Client casesThe supplier reports providing OEM services for well-known brands, which is direct evidence of at least one type of customer engagement. No brand names, project details, product quantities, performance records, or additional customer cases are provided.

Product Q&A

Q:What is a double-ended twist drill and how is it different from a standard twist drill?

A double-ended twist drill features cutting points at both ends of the drill, allowing operators to reverse and continue drilling once one end wears out. Compared to standard single-ended drills, it offers extended tool life, reduced downtime for tool changes, and cost savings, especially in high-volume production environments.

Q:What materials and coatings are available for your double-ended twist drills?

Material options: High-speed steel (HSS/M2/M35) Cobalt high-speed steel (HSS-Co) Powder metallurgy high-speed steel (PM-HSS) Coating options: TiN (general purpose) TiAlN (high-temperature resistance for hard materials) TiCN (high hardness and superior wear resistance) Uncoated and custom coating options available upon request.

Q:What causes rapid wear or breakage during drilling, and how can it be avoided?

Common causes: Excessive feed rate Insufficient cooling or lack of cutting fluid Using unsuitable drills for hard materials instead of cobalt or coated variants Recommendations: Select the appropriate drill material, coating, and geometry based on the workpiece hardness and drilling depth. Always apply adequate cutting fluid to reduce heat buildup and extend tool life.

Q:How can I tell when a double-ended twist drill needs to be replaced?

Increased burrs on the hole edge Abnormal or rough cutting noise Hole diameter deviation exceeding 0.1mm Visible wear, chipping, or blunting on the cutting edge Tip: Regularly inspect the cutting edges under magnification and replace drills promptly to maintain machining accuracy and surface finish quality.

Q:Do you offer custom double-ended twist drill designs? What options are available?

Yes - we support complete customization, including: Internal coolant hole designs (drawings required) Step drills, multi-diameter drills, and double-ended step drills Custom helix angles, point angles, flute lengths, total lengths, diameters, and coatings Customizations ensure optimized drilling performance for specific materials, hole depths, and machining environments.