What is the warranty period for this product?

We provide a 1-year warranty for this product.

What is the average lead time for production?

The average lead time is within 15 workdays for both peak season and off-season.

28mm High Quality Cheap Small Half Piece Bolt Bit for Drilling Support Holes

Name: 28mm High Quality Cheap Small Half Piece Bolt Bit for Drilling Support Holes
Brand: Qidong Fengsu Drilling Tools Co., Ltd.
SKU: 2044831932

Hunan, ChinaQidong Fengsu Drilling Tools Co., Ltd.

US$3.00

1-19 pieces

US$2.00

20+ pieces

Product profile

Customization

Available

Warranty

1 Year

Certification

ISO 9001:2000, ISO 9001:2008

Model NO.

28#

Standard

AISI

Manufacturing Process

Forging

Material

45crnimov

Weight (Kg)

0.3

Condition

New

Usage

Mining Industry

Bit Type

PDC Core Diamond Bit

Machine Type

Drilling Equipment

Use

Support Hole

Color

Customized

Video Outgoing-Inspection

Provided

Type

Diamond Coreless Drill Bits

Advantage

Wear Resistant

Thread Type

Male Female Thread

Application

Mine, Traffic and Other Anchor Mesh Support Holes

Machinery Test Report

Provided

Size

28mm

Packing

Wooden Case&Cartons

Transport Package

Wooden Case

Specification

28mm

Trademark

SPEEDMADE

Origin

Hunan, China

HS Code

82071300

Key features

High Wear Resistance: Made of high-quality PDC cutters with superior wear and impact resistance.

Extended Lifespan: Lasts 10 to 30 times longer than standard alloy drill bits.

Customizable Color: Available in gold, silver, black, and other custom colors.

Versatile Application: Suitable for mining, traffic, anchor mesh, dams, and roadways.

Wide Size Range: Drilling diameters from 25mm to 42mm available.

Professional Support: Geological engineers assist in selecting bits for specific strata.

Quality Certified: ISO 9001:2000/2008 certified with 100% finished product inspection.

Low MOQ: Minimum order quantity is just 1 piece for testing quality.

Company profile

ODM ServicesR&D CapabilitiesManagement Certification

Qidong Fengsu Drilling Tools Co., Ltd.

Hunan, China

Business Type: Manufacturer/Factory CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 7 Years CertifiedNearest Port: Shenzhen PortAverage Response Time: ≤24h

AI-Powered supplier vetting

SummaryThe supplier operates in metal tool, drilling equipment, mining machinery, mechanical equipment, and related metal-product businesses. It reports ISO9001:2015 and ISO14001 certifications, as well as additional management-system certifications including BSCI, TS16949, and GMP, although the applicable scope and validity are not specified. Service procedures, corrective-action procedures, and complaint-handling records are stated to exist. The supplier offers OEM and ODM services and launched new products during the past year, but it has no available SDK and only two R&D engineers are reported. Production information includes five production lines and 31–40 quality-control staff; the stated output figure is omitted for privacy. Financial records are identified for 2021–2023, but no financial results are provided. No Fortune 500 cooperation is reported, and overseas-service coverage is listed as zero.

Supplier typeThe supplier is a manufacturer and seller of metal tools, drilling and oil-production equipment, mining machinery, mechanical parts, hardware, and metal materials. Its product description specifically covers drill bits for water wells, natural gas, oil, coal, geothermal, and geological exploration applications.

CertificationsThe supplier reports ISO9001:2015 and ISO14001 certifications, while another slice lists BSCI, TS16949, ISO9001, and GMP management-system certifications. The records do not specify certificate scope, issuing bodies, or validity dates, but they explicitly evidence multiple certifications.

After-Sales capabilityThe supplier states that it has written procedures and implementation records for service capability assessment, corrective and preventive actions, and customer complaint handling. However, overseas-service coverage is recorded as zero, so the evidence supports formal service processes but not broad international service reach.

R&D capabilityThe supplier reports new products during the past year, provides ODM services, and has R&D engineers with 6–10 years of total experience. It also reports only two R&D engineers and explicitly states that no SDK is available, indicating some product-development capability but limited evidence of broader technical resources.

Production capacityThe supplier reports five production lines and 31–40 quality-control staff, providing explicit evidence of an organized manufacturing and quality-control setup. The supplier also states an annual production-output range, but that figure is excluded here under the privacy requirement; product-specific capacity is not provided.

Customization capabilityThe supplier explicitly offers ODM and OEM services and provides different drill-bit models and sizes for varied applications and rock conditions. This supports customization capability for relevant products, although the scope of engineering changes and customization limits is not detailed.

Client casesThe supplier explicitly reports no cooperation with Fortune 500 companies. Although it states a preference for repeat buyers at 80%–100%, no named customers, reference projects, or verifiable customer cases are provided.

Product Q&A

Q:What are your main products and their uses?

Our products include diamond core bits, PDC drill bits, reaming shells, core barrels, casing, drill rods, SPT equipment, drill rigs, and other drilling parts. They are mostly used for mineral exploration, geological drilling, geotechnical engineering, building wells drilling, and soil sampling.

Q:Do you accept sample orders?

Yes, we welcome sample orders to test our quality.

Q:Can we select the color of the drill bit?

Yes, we have a standard rock hardness select index to choose drill bit matrix hardness. If you need, we can make the drill bit color based on yours.

Q:What are the payment terms, MOQ, and delivery methods?

1. Payment: T/T, L/C, Western Union, Paypal. 2. Min. order quantity: 1 piece. 3. Transportation: By DHL/TNT/Fedex express, air transportation, sea, and train.

Q:How does your company control the quality?

1. Quality first: We conduct serious inspections for all products and raw materials in strict procedures. We have obtained ISO9001:2000 certification. 2. After-sales service: We have a Quality Guarantee system based on industrial standards and field experience.