Name: High Quality DHD350A 222mm DTH Hammer Bit For Hard Rock Mining Water Well Drilling Tool
Brand: KSQ Technologies (Beijing) Co. Ltd
SKU: DHD350A
Price: 550 USD
Availability: InStock

Home Products Rock Drilling Tools

High Quality DHD350A 222mm DTH Hammer Bit For Hard Rock Mining Water Well Drilling Tool

Product Details:

Place of Origin:	CHINA
Brand Name:	MIROC
Certification:	ISO
Model Number:	DHD350A

Payment & Shipping Terms:

Minimum Order Quantity:	1
Price:	＄550
Packaging Details:	Wooden box
Supply Ability:	30000

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Detailed Product Description

Product Name:	DTH Hammer Bits	Color:	Green Or Customized
Keyword:	High Performance DTH Drilling Bits	Application:	Mining,Rock Drilling
Rock Drilling:	High Performance	Item:	Drilling Equipment Bit
Applicable Industries:	Construction Works , Energy & Mining
Highlight:	222mm DTH hammer bit for hard rock , DHD350A water well drilling tool , mining rock drilling tools with warranty

DHD350A 222mm DTH Hammer Bit for Hard Rock Mining & Water Well Drilling

Product Overview

The DHD350A 222mm DTH hammer bit is a premium-grade down-the-hole drilling tool engineered for demanding hard rock mining, water well drilling, quarrying, and construction applications. Featuring the DHD350A shank configuration with a valveless air distribution design, this bit delivers exceptional penetration rates, superior wear resistance, and reliable performance in the most challenging geological conditions.

The DHD350A is the without foot valve version of the DHD350 series, designed for high air pressure operation (1.0-2.5 MPa), offering simpler internal structure, longer service life, and easier maintenance compared to valved designs.

DHD350 High Air Pressure DTH Bit Specifications

Diameter (mm/in)	Buttons and Size (mm)	Flushing Hole	Weight (kg)	Part Number
DHD350 Ballistic button/Concave face
130 / 5 1/8	4×14,3×14	8×16	15	4148301310
133 / 5 1/4	4×14,3×14	8×16	15	4148301311
140 / 5 1/2	4×14,4×14	8×16	16	4148301312
146 / 5 3/4	4×14,4×14	8×16	18	4148301313
152 / 6	4×16,4×16	8×18	20	4148301314
DHD350 Spherical button/Concave face
130 / 5 1/8	4×14,3×14	8×16	15	4148301315
133 / 5 1/4	4×14,3×14	8×16	15	4148301316
140 / 5 1/2	4×14,4×14	8×16	16	4148301317
146 / 5 3/4	4×14,4×14	8×16	18	4148301318
152 / 6	4×16,4×16	8×18	20	4148301319
DHD350 Ballistic button/Convex face
130 / 5 1/8	3×14,4×14	9×16	15	4148301320
133 / 5 1/4	3×14,4×14	9×16	15	4148301321
140 / 5 1/2	3×16,4×16	9×16	16	4148301322
146 / 5 3/4	3×16,4×16	9×16	18	4148301323
152 / 6	3×16,5×16	9×18	20	4148301324
DHD350 Spherical button/Flat face
130 / 5 1/8	7×14	8×16	15	4148301325
133 / 5 1/4	7×14	8×16	15	4148301326
140 / 5 1/2	7×14	7×18	16	4148301327
140 / 5 1/2	8×14	9×16	16	4148301328
146 / 5 3/4	8×14	9×16	18	4148301329
152 / 6	8×16	9×18	20	4148301330

Design Features

Feature	Description	Benefit
Valveless Distribution	No foot valve design, air distributed directly	More reliable, fewer internal parts
Optimized Flushing	Strategically positioned air holes	Efficient cuttings removal, prevents bit balling
Multiple Head Profiles	Concave / Flat / Convex options	Adaptable to different rock conditions
Premium Carbide Buttons	Spherical and ballistic button configurations	Superior wear resistance and fast penetration

Head Profile Options

Profile	Best For	Key Benefit
Concave	Hard, abrasive rock	Shearing action, prevents bit balling
Flat	Medium-hard rock	Balanced cutting, versatile
Convex	Extremely hard rock	Concentrates impact energy in center

Applications

Industry	Application
Mining	Blast hole drilling, ore extraction
Water Well	Large diameter water well construction
Quarrying	Aggregate production, dimension stone
Construction	Foundation drilling, piling
Geothermal	Geothermal well drilling

Quality Assurance

100% Dimensional Inspection - Guarantees precise fit with DHD350A hammers
Hardness Testing - Ensures consistent material properties
Button Integrity Check - Verifies secure brazing and proper seating
ISO 9001 Certified - Manufactured under strict quality management systems

Tag:

Contact Person: Mr. Yingkai Zhang

Tel: +86 18501231988

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High Quality DHD350A 222mm DTH Hammer Bit For Hard Rock Mining Water Well Drilling Tool

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