China Hex25 Rock Drilling Tools R25 Thread Extension Rods for Drifting and Tunnelling Manufacturer, Pricelist

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China Hex25 Rock Drilling Tools R25 Thread Extension Rods for Drifting and Tunnelling Manufacturer, Pricelist

Product Details

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

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Product Description

📊 Basic Information

Model NO.hex25-r25

CertificationISO 9001:2000, ISO 9001:2008

StandardGB

Surface TreatmentSpray-Paint

Manufacturing ProcessForging

MaterialCarbon Steel

ThreadR25

Machine TypeDrilling Tools

ColorRed, Black, Yellow, White

Material Quality23crni3mo D6a

Transport PackageWooden Case

SpecificationExtension Rods / Speed rods

HS Code82071990

Production Capacity500,000 PCS/Month

📦 Packaging & Delivery

Package Size30.00cm * 30.00cm * 30.00cm

Gross Weight5.000kg

📝 Product Description

Extension rods are manufactured using hollow drill steels and are available in two primary shapes: round and hexagonal. The hollow center, known as the flushing hole, is essential for transmitting water or air during the drilling process. The threads are designed for seamless connection with couplings, shanks, or drill bits.

Technical Specifications:

Thread Types: R22, R25, R28, R32, R38, T38, T45, T51, ST58, T60
Rod Sizes (Hex): 22mm, 25mm, 28mm, 32mm, 35mm
Rod Sizes (Dia): 39mm, 46mm, 52mm
Available Lengths: 0.4m to 6m (600mm to 6400mm)
Steel Grade: Male-Male Rod, MF Rod

HEX EXTENSION ROD SPECIFICATIONS (R22 / R25 / R28)
Rod Cross Section	Length (L)		Thread
Rod Cross Section	mm	FT	Left	Right
HEX 22	610	2'	R22	R22
HEX 22	1220	4'	R22	R22
HEX 22	1830	6'	R22	R22
HEX 25 Series (R25 Rope Thread)
HEX 25	610	2'	R25	R25
HEX 25	1000	3' 3"	R25	R25
HEX 25	1525	5'	R25	R25
HEX 25	3050	10'	R25	R25
HEX 25	4305	14' 1.5"	R25	R25
HEX 28 Series (R28 Rope Thread)
HEX 28	610	2'	R28	R28
HEX 28	1525	5'	R28	R28
HEX 28	3660	12'	R28	R28

Frequently Asked Questions

❓ What materials are used for these extension rods?

The rods are made from high-quality Carbon Steel and 23crni3mo D6a, ensuring durability and strength for heavy-duty drilling tasks.

❓ What is the purpose of the flushing hole?

The hollow flushing hole is designed to transmit water or air to the drill bit during operation to cool the equipment and clear debris.

❓ Which thread types are available?

We provide a wide range of threads including R22, R25, R28, R32, R38, T38, T45, T51, ST58, and T60 to ensure compatibility with various drilling tools.

❓ Can I get custom lengths for the extension rods?

Yes, while standard lengths range from 600mm to 6400mm, various lengths are available to meet specific project requirements.

❓ How are the rods protected during transport?

All products are securely packed in wooden cases or bundles to prevent damage during shipping and handling.

❓ What surface treatment is applied to the rods?

The rods undergo a spray-paint surface treatment, which provides an extra layer of protection against corrosion and wear.