What coatings are available for these drill bits?

Advanced PVD coatings like TiN and TiAlN can be applied to improve durability, chip removal, or performance for specific materials and cutting conditions. TiAlN offers heat resistance, while TiCN offers wear resistance.

What is the lead time for orders?

The off-season lead time is within 15 workdays, while the peak season lead time is one month.

Cobalt M35 Twist Drill Bits, Heat Treated, Fine Workmanship, Multiple Size Options

Name: Cobalt M35 Twist Drill Bits, Heat Treated, Fine Workmanship, Multiple Size Options
Brand: Zhejiang ZhengCheng lmport & Export Co.,LTD
SKU: 1970256401

Zhejiang, ChinaZhejiang ZhengCheng lmport & Export Co.,LTD

US$0.10-1.20

50 Piece

Sample price:US$1.50/piece.Request sample

Product profile

Customization

Available

Customized

Standard

GB/T

Model NO.

M35

Length

Standard Length

Type

Twist Drill Bit

Material

High Speed Steel

Usage

Metal Drilling

Application

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

Unit Price

Shank Shape

Straight Shank

Customized Support

OEM, ODM

Transport Package

Plastic Box or Your Requriement

Specification

1.5mm - 13mm

Trademark

ZEICIN

Origin

China

HS Code

8207509000

Key features

M35 Cobalt HSS Material: Contains 5% cobalt for superior heat resistance, wear resistance, and edge retention.

Vacuum Heat Treatment: Enhances surface hardness up to HRC 67 and internal toughness for extended tool life.

Wide Application Range: Ideal for stainless steel, alloy steel, cast iron, and other tough-to-machine metals.

High-Precision Design: Optimized flute geometry and anti-slip ground tip ensure accurate, clean holes with minimal chatter.

Customizable Options: Supports OEM/ODM, custom sizes (1-13mm), and advanced PVD coatings like TiN/TiAlN.

Corrosion Resistant: Polished finish provides enhanced rust resistance, extending tool life in humid environments.

Fast Chip Evacuation: Advanced spiral flute design prevents heat buildup and material clogging during continuous use.

Short Lead Time: Efficient production ensures quick delivery, with off-season lead time within 15 workdays.

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: ≤1.23hTerms 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 makes M35 cobalt twist drill bits different from regular HSS bits?

M35 cobalt twist drill bits contain 5% cobalt, which enhances their heat resistance, wear resistance, and edge retention. This makes them ideal for drilling tough materials like stainless steel, hardened alloys, and cast iron, providing superior performance compared to standard HSS bits.

Q:What materials can these M35 cobalt drill bits handle?

These drill bits are designed to drill through tough materials, including stainless steel, alloy steel, cast iron, carbon steel, and other hard-to-machine metals. They are also effective for drilling softer materials like aluminum and wood in multi-material applications.

Q:Are the M35 drill bits available in different sizes?

Yes, our M35 cobalt twist drill bits are available in a variety of sizes, ranging from 1mm to 13mm, with 1mm increments. We also offer custom sizes upon request to meet your specific project requirements.

Q:Can these drill bits be used for high-speed drilling?

Yes, M35 cobalt twist drill bits are specifically designed for high-speed drilling. The cobalt alloy ensures that the bits retain their sharpness and resist heat buildup, even under demanding high-speed conditions.

Q:What is the hardness of the drill bits after heat treatment?

The combination of quenching, cryogenic treatment, and tempering optimizes the drill bits' hardness up to HRC 67, while maintaining structural integrity and crack resistance.