High-Quality Hex28 Rock Drilling Tools Drifting and Tunnelling R28 Thread Extension Rods Manufacturer, Quotes

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High-Quality Hex28 Rock Drilling Tools Drifting and Tunnelling R28 Thread Extension Rods Manufacturer, Quotes

Product Details

Customization:	Available
After-sales Service:	Repair or Replacement
Warranty:	6 Months

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Product Description

Basic Information

Model NO.

hex28-r28

Certification

ISO 9001:2000, ISO 9001:2008

Standard

Surface Treatment

Spray-Paint

Process

Forging

Material

Carbon Steel

Thread

R28

Machine Type

Drilling Tools

Color

Red, Black, Yellow, White

Material Quality

23crni3mo D6a

Production Capacity

500,000 PCS/Month

HS Code

82071990

Packaging & Delivery

Package Size

30.00cm * 30.00cm * 30.00cm

Gross Weight

5.000kg

Transport Package

Wooden Case

Product Description

Extension rods are manufactured using hollow drill steels. They are available in two primary shapes: Round type and Hexagonal type. The central hollow hole, commonly referred to as a flushing hole, is designed for transmitting water or air during the drilling process. The integrated threads facilitate the connection of couplings, shanks, or drill bits.

Technical Specifications:

Thread Options: R22, R25, R28, R32, R38, T38, T45, T51, ST58, T60
Rod Lengths: Available from 600mm up to 6400mm
Steel Grade: Male-Male Rod, MF Rod
Hexagonal Sizes: 22mm, 25mm, 28mm, 32mm, 35mm
Diameter Sizes: 39mm, 46mm, 52mm

Technical Data Sheets

HEX 28 - R28 (1-1/8" Rope Thread)

Rod Cross Section	Length (L)		Thread
Rod Cross Section	mm	FT	Left	Right
HEX 28	610	2'	R28	R28
HEX 28	915	3'	R28	R28
HEX 28	1220	4'	R28	R28
HEX 28	1525	5'	R28	R28
HEX 28	1830	6'	R28	R28
HEX 28	2435	8'	R28	R28
HEX 28	3050	10'	R28	R28
HEX 28	3660	12'	R28	R28

HEX 25 - R25 (1" Rope Thread)

Rod Cross Section	Length (L)		Thread
Rod Cross Section	mm	FT	Left	Right
HEX 25	610	2'	R25	R25
HEX 25	1220	4'	R25	R25
HEX 25	1830	6'	R25	R25
HEX 25	3050	10'	R25	R25

Frequently Asked Questions

What are extension rods used for in drilling?

Extension rods are used to connect the drill bit to the rock drill's shank adapter or coupling, allowing for deeper drilling. The central flushing hole allows for the passage of air or water to clear debris.

What is the difference between round and hexagonal extension rods?

Hexagonal rods provide greater rigidity and are often used in drifting and tunneling applications, while round rods are typically lighter and used in long-hole drilling where flexibility or specific flushing requirements are needed.

Which thread types are available for these rods?

We offer a wide range of industry-standard threads including R22, R25, R28, R32, R38, T38, T45, T51, ST58, and T60 to ensure compatibility with various drilling rigs.

What materials are the extension rods made of?

The rods are manufactured from high-quality carbon steel and premium grades like 23crni3mo D6a, ensuring durability and high resistance to wear and forging stress.

Can I request custom lengths for the drilling rods?

Yes, while standard lengths range from 600mm to 6400mm (0.4m to 6m), we can accommodate specific size requirements based on your project needs.

How are the products packaged for international shipping?

To ensure safety during transport, all extension rods are securely packed in heavy-duty wooden cases or tightly bound bundles to prevent movement and damage.