Factory Direct HSS Serrated Twist Drill for High-Efficiency Drilling

Name: Factory Direct HSS Serrated Twist Drill for High-Efficiency Drilling
Brand: Zhejiang ZhengCheng lmport & Export Co.,LTD
SKU: 1967544281

Zhejiang, ChinaZhejiang ZhengCheng lmport & Export Co.,LTD

US$1.20-3.50

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

Straight Shank

Transport Package

Plastic Box or Your Requriement

Specification

According To The Order Requirements

Trademark

ZEICIN

Origin

China

HS Code

8207509000

Key features

Serrated Design: Specially designed cutting edges reduce resistance, improve chip evacuation, and minimize heat buildup.

Wide Material Compatibility: Effective for stainless steel, titanium alloys, mold steel, copper, aluminum, cast iron, and engineering plastics.

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

Optional Coatings: Available with TiN, TiAlN, TiCN, or custom coatings to enhance wear resistance and heat tolerance.

Fast Lead Time: Efficient production ensures quick delivery, with off-peak lead times within 15 workdays.

High Fracture Resistance: Reinforced design and cryogenic treatment prevent breakage during high-load applications.

OEM/ODM Support: Full customization support including internal coolant holes and special drill profiles.

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: ≤1.01hTerms 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 serrated twist drill and how is it different from a standard twist drill?

A serrated twist drill features specially designed serrated cutting edges along the flute, which reduce cutting resistance, improve chip evacuation, and minimize heat buildup during drilling. Compared to standard twist drills, it delivers faster cutting, smoother chip removal, and longer tool life, especially when machining stainless steel, titanium alloys, and other tough materials.

Q:What materials and coatings are available for your serrated 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 are also 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 standard drills for hard materials instead of cobalt or coated variants. Recommendations: Select the right drill type and coating based on material hardness and drilling depth, and always apply adequate cutting fluid to extend tool life and prevent breakage.

Q:How can I tell when a serrated twist drill needs to be replaced?

Signs include: Increased burrs on the hole edge, abnormal or rough cutting noise, hole diameter deviation exceeding 0.1mm, and visible chipping or wear on the serrated cutting edge. Tip: Regularly inspect the cutting edge under magnification and replace drills promptly to maintain machining accuracy.

Q:Do you offer custom serrated twist drill designs? What options are available?

Yes - we support full customization, including: Internal coolant hole drills (drawings required), step drills, multi-land drills, and special serration profiles. Custom helix angle, cutting angle, flute length, total length, diameter, and coating options are also available.