What materials are used for the drill bits?

Our drill bits are made of high carbon steel, ensuring high quality, performance, and wear resistance.

Which port do you ship from?

We usually ship containers from Shanghai port, but changes can be made according to your request.

What is the warranty policy?

Our hammers are made of high-quality steel, and all spares are inspected strictly before shipping. We provide quick responses to complaints and suggestions.

Numa Shank DTH Drill Bits for Large Diameter Drilling Projects

Name: Numa Shank DTH Drill Bits for Large Diameter Drilling Projects
Brand: Changsha Heijingang Industrial Co., Ltd.
SKU: 2202586152

Hunan, ChinaChangsha Heijingang Industrial Co., Ltd.

US$150.00

1-29 Pieces

US$145.00

30-99 Pieces

US$140.00

100+ Pieces

Product profile

Customization

Available

Customized

Non-Customized

Length

2 Inch to 30 Inch

Model NO.

HJG261104F

Type

Core Drill Bit

Material

High Carbon Steel

Usage

Well Drilling, Metal Drilling, Masonry Drilling

Face Design

Flat, Convex, Concave, Double Gauge

Button Shape

Spherical, Parabolic, Ballistic, Sharp, Flat

Delivery Time

Within 25 Working Days

Carbide Button Material:

Tungsten Carbide

Bit Diameter:

80mm~254mm

Bit Body Material:

Alloy Steel

Connection Type:

Thread Connection

Working Pressure:

High / Medium Air Pressure

Application:

Mining, Water Well, Quarry Drilling

Surface Treatment:

Heat Treatment

Transport Package

Plywood Box, Carton Box or as Your Request

Specification

DHD, COP, SD, QL, Mission, Br, Numa

Trademark

HJG

Origin

China

HS Code

8412310090

Production Capacity

50000PCS/Year

Key features

High hardness carbide buttons, strong wear resistance, long service life for hard rock drilling

Optimized air flushing structure, fast cuttings removal, improve drilling efficiency

Precise machining, good concentricity, stable drilling and low probability of bit sticking

Multiple models available, compatible with various DTH hammers, support customized production

High toughness steel bit body, impact resistant, suitable for complex geological conditions

Company profile

Changsha Heijingang Industrial Co., Ltd.

Hunan, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service AvailableExport Year: 2011-01-25 CertifiedNearest Port: Shanghai PortAverage Response Time: ≤6.75h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryChangsha Heijingang Industrial Co., Ltd. is a China-based limited company established in 1999, specializing in rock-drilling equipment and pneumatic tools. Its stated product range includes DTH hammers and bits, drilling rigs, threaded bits, shank adapters, coupling sleeves, drill pipes, tool joints, and related spare parts. The supplier reports ISO9001:2015, ISO14001:2015, and ISO45001:2016 certifications, 22 years of R&D engineer experience, 10 production lines, 11–20 quality-control staff, and stated annual capacities of 200,000 DTH hammers/drill bits and 10,000 drilling rigs. It began exporting in 2011 and reports customers or markets across multiple global regions. Evidence supports established manufacturing, certification, product breadth, and export capability. However, the provided information does not adequately demonstrate after-sales service systems, customization processes, customer case studies, or financial credibility.

Supplier typeThe supplier is identified as a privately operated limited company in China, established in 1999, with manufacturing and processing machinery as a commercial focus. Its described business involves researching and manufacturing rock-drilling equipment, pneumatic tools, drilling rigs, drilling bits, drill pipes, and related components, indicating a manufacturer rather than a trading-only entity.

CertificationsThe supplier reports ISO9001:2015 quality-management certification, ISO14001:2015 environmental-management certification, and ISO45001:2016 occupational-health-and-safety certification, plus other unspecified certifications. These stated certifications provide explicit evidence of formal management-system coverage.

R&D capabilityThe supplier reports 22 years of R&D engineer experience and describes research into rock-drilling equipment, including a new-style geothermal drilling rig. It also states that it uses advanced craft technology and conducts strict quality inspection, providing explicit support for engineering and product-development capability, although no patent or new-product output data is given.

Production capacityThe supplier reports 834 employees, a 54,034 m² manufacturing plant, 10 production lines, 11–20 quality-control staff, and stated annual capacities of 200,000 DTH hammers/drill bits and 10,000 drilling rigs. It also reports one-month fulfillment timing in both off-peak and peak seasons, which supports substantial and relatively consistent production capacity.