📦 DTH Drill Bits

L3/L30 DTH Drill Bit

Name: L3/L30 DTH Drill Bit
Brand: Kaishan
SKU: L3/L30
Availability: InStock

Model: L3/L30

L3/L30 DTH Drill Bit (official model L3/L30). Source: Zhejiang Kaishan Heavy Industry product centre.

Best For

Mining Blast Hole Drilling Water Well Drilling Quarrying and Aggregate Production Construction Foundation Piling

Technical Specifications

Model	L3/L30
Type	DTH Drill Bit
Size	76mm - 152mm (3" - 6")
Application	Mining, Water Well, Quarrying, Construction
Material	Alloy Steel Body with Tungsten Carbide Buttons
Weight	4.5kg - 25kg (depending on size)
Packing	Wooden Case or Carton

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Selection Advantages Applications Comparison Components Principle Features Packaging Service FAQ

Product Details

## Overview Kaishan L3/L30 DTH drill bits are precision-engineered tools for down-the-hole hammer drilling in demanding applications. As part of Kaishan's extensive drilling tools line, these bits are manufactured using high-grade alloy steel and tungsten carbide inserts, ensuring superior durability and wear resistance. The L3/L30 series is suitable for a wide range of rock formations, from soft to extremely hard, and is compatible with most standard DTH hammers. ## Technical Features The L3/L30 bits feature an optimized head design with multiple flushing holes to efficiently remove cuttings and minimize regrinding. The carbide buttons are strategically arranged to maximize penetration rate and balance wear. The bit body undergoes advanced heat treatment for enhanced strength and fatigue resistance. Available in diameters from 76mm to 152mm, with various face configurations (flat, concave, convex) and button shapes (spherical, ballistic, parabolic) to suit specific drilling conditions. The connection thread is standard API or metric, ensuring compatibility with common DTH hammers. ## Applications These bits are widely used in mining blast hole drilling, quarrying, water well drilling, geothermal exploration, and construction foundation piling. Their robust construction and efficient cutting action make them ideal for hard rock drilling where reliability and productivity are critical. Whether drilling in granite, basalt, limestone, or sandstone, the L3/L30 bits deliver consistent performance and extended service life. ## Quality Assurance Kaishan implements strict quality control throughout the production process, from raw material inspection to final performance testing. Each bit is checked for dimensional accuracy, hardness, and brazing quality. With a global network of distributors and service centers, Kaishan provides timely support and genuine spare parts to keep your operations running smoothly.

Technical Selection

Key parameters for matching this machine to your job. Send us your hole diameter, depth and rock condition and our engineers will confirm the right configuration.

Weight

4.5kg - 25kg (depending on size)

Model

L3/L30

Type

DTH Drill Bit

Size

76mm - 152mm (3" - 6")

Application

Mining, Water Well, Quarrying, Construction

Material

Alloy Steel Body with Tungsten Carbide Buttons

Packing

Wooden Case or Carton

Not sure this model fits? Tell us the hole diameter and depth — we will confirm the matching rig, compressor and hammer.

Check with an engineer

Key Advantages

✓

High-grade tungsten carbide buttons for superior wear resistance

✓

Optimized flushing design for efficient cuttings removal

✓

Robust alloy steel body with advanced heat treatment

✓

Available in multiple diameters and face designs

✓

Compatible with standard DTH hammers and API threads

✓

Long service life and low total drilling cost

✓

Consistent quality from Kaishan's ISO-certified factory

Applications

📍 Mining Blast Hole Drilling

Used in open-pit and underground mines for drilling blast holes in hard rock.

Solution: L3/L30 bits with spherical buttons provide high penetration rates and even wear, reducing drilling time and cost per meter.

📍 Water Well Drilling

Ideal for drilling water wells in various geological formations.

Solution: Concave face design improves hole straightness and flushing efficiency, ensuring clean and stable water wells.

📍 Quarrying and Aggregate Production

Applied in quarries for drilling blast holes in granite, limestone, and other aggregates.

Solution: Ballistic buttons enhance penetration in medium-hard rock, while robust body withstands abrasive conditions.

📍 Construction Foundation Piling

Used for drilling foundation holes in building and infrastructure projects.

Solution: Flat face design with multiple flushing holes ensures fast cuttings removal and precise hole alignment.

Similar Models in This Category

This model is unique in its series — here are similar models from the same category.

Model	Model	Type	Size	Application	Material	Inquire
L3/L30This model	L3/L30	DTH Drill Bit	76mm - 152mm (3" - 6")	Mining, Water Well, Quarrying, Construction	Alloy Steel Body with Tungsten Carbide Buttons	Get a Quote
K10	K10	DTH Drill Bit (Down-the-Hole Button Bit)	90–130 mm diameter (customizable)	Mining, quarrying, water well drilling, construction	Alloy steel body with tungsten carbide buttons	Get a Quote
K3	K3	DTH Drill Bit	76mm - 152mm	Mining, Quarrying, Water Well Drilling	Alloy Steel with Carbide Buttons	Get a Quote
K30	K30	DTH Button Bit	76mm - 152mm (customizable)	Mining, Quarrying, Water Well, Construction	Alloy Steel Body with Tungsten Carbide Buttons	Get a Quote
K4	K4	DTH Drill Bit	Φ110 mm (standard); other sizes available	Mining, water well drilling, quarrying, construction	Alloy steel body with carbide button inserts	Get a Quote
K40	K40	DTH Button Bit	76mm - 152mm (3" - 6")	Mining, quarrying, water well drilling, construction	Alloy steel body with tungsten carbide buttons	Get a Quote
K5	K5	DTH Button Bit	130 mm - 152 mm diameter	Mining, quarrying, water well drilling, foundation engineering	Alloy steel body with tungsten carbide buttons	Get a Quote
K50	K50	DTH Drill Bit (Button Bit)	5 inch (127 mm) shank, 130-140 mm diameter	Mining, quarrying, water well drilling, construction	Alloy steel body with tungsten carbide buttons	Get a Quote
K6	K6	DTH Button Bit	76mm - 152mm (3" - 6")	Mining, Quarrying, Water Well Drilling, Construction	Alloy Steel Body with Tungsten Carbide Buttons	Get a Quote

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Main Components

Bit body (alloy steel)
Tungsten carbide buttons
Flushing holes
Connection thread (API or metric)
Face design (flat/concave/convex)
Shank
Grooves
Retaining ring

Working Principle

DTH drill bits operate at the bottom of the drill string, directly impacting the rock with high-frequency piston strikes. The bit is connected to a DTH hammer, which is powered by compressed air. When the hammer fires, the piston strikes the bit's shank, transferring energy to the carbide buttons that crush and fracture the rock. Simultaneously, compressed air flows through the bit's flushing holes to remove cuttings from the hole bottom and carry them to the surface. The bit rotates slowly, indexing the buttons to new positions for even wear. This mechanism allows efficient drilling in hard rock with minimal energy loss, as the impact energy is applied directly to the rock without traveling through the entire drill string. The L3/L30 bits are designed to optimize this process, with button shapes and flushing configurations tailored to different rock types, ensuring maximum penetration rate and bit life.

Detailed Features

▸High wear resistance
▸Efficient flushing
▸Optimal button layout
▸Strong and durable body
▸Multiple size options
▸Compatibility with standard hammers
▸Long service life
▸Consistent performance

Packaging & Shipping

Each DTH drill bit is packed in a wooden case or carton with foam protection, then palletized for container shipment. Standard export packing ensures safe transport. Delivery time is typically 15-30 days after order confirmation. Ports of shipment include Shanghai, Ningbo, or as per customer request. We can arrange FOB, CIF, or other terms.

After-Sales Service

Kaishan offers a 6-month warranty on DTH drill bits against manufacturing defects. Our 24-hour technical support team is available to assist with product selection and troubleshooting. We provide training on proper bit usage and maintenance. Genuine spare parts and accessories are available from our global warehouses. Customized solutions and OEM services are also offered.

Frequently Asked Questions

What sizes are available for the L3/L30 DTH drill bit?+

The L3/L30 DTH drill bit is available in sizes from 76mm to 152mm (3" to 6"). This range covers mining, water well, quarrying and construction drilling. Weight varies from 4.5kg to 25kg depending on size.

What material is the L3/L30 DTH drill bit made of?+

The L3/L30 DTH drill bit uses an alloy steel body with tungsten carbide buttons. The carbide buttons are arranged to balance wear across the bit face. The alloy steel body is heat treated for strength and fatigue resistance.

What equipment does the L3/L30 DTH drill bit work with?+

The L3/L30 DTH drill bit is compatible with standard DTH hammers. It is designed for down-the-hole hammer drilling in soft to extremely hard rock formations. The bit is available in multiple face designs to match different rock conditions.

What applications is the L3/L30 DTH drill bit used for?+

The L3/L30 DTH drill bit is used for mining blast hole drilling, water well drilling, quarrying and aggregate production, and construction foundation piling. It suits hard rock formations and demanding site conditions. The optimized flushing design removes cuttings efficiently during drilling.

How is the L3/L30 DTH drill bit packed for shipping?+

Each L3/L30 DTH drill bit is packed in a wooden case or carton with foam protection, then palletized for container shipment. Delivery time is typically 15-30 days after order confirmation. Ports of shipment include Shanghai and Ningbo.

What warranty covers the L3/L30 DTH drill bit?+

Kaishan offers a 6-month warranty on L3/L30 DTH drill bits against manufacturing defects. A 24-hour technical support team assists with product selection and troubleshooting. Training on proper bit usage and maintenance is also provided.

What are the key features of the L3/L30 DTH drill bit?+

The L3/L30 DTH drill bit features high-grade tungsten carbide buttons for wear resistance and an optimized flushing design for efficient cuttings removal. Its alloy steel body has advanced heat treatment for durability. The bit is compatible with standard DTH hammers and API threads.