Rock Drilling MF Thread Round Extension Rods For Tunneling

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22-Apr-2020

Rock Drilling MF Thread Round Extension Rods For Tunneling

Extension rods are made by hollow drill steels. This hollow hole are usually named flushing hole, used for transmitting water or air during drilling.
And the threads can be used for connecting couplings, shanks, couplings or bits.

Body Type:
There are two shapes of extension rods, round type and hexagonal type.
Hexagon rods are more rigid, heavier and transfer energy more efficiently, while increasing flushing.
Round rods are generally lighter than hexagonal rods and are normally used in extension drilling applications.

Thread Type:
Usually for extension rods, there are R22, R25, R28, R32, R38, T38, T45, T51, ST58, T60 threads,
and different lengths of rods are available from 400mm to 6400mm usually. url:http://www.chinarockdrilling.com

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Xiamen Bestlink Factory Co., Ltd.

Xiamen (China)

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Manufacturers, Trader & Exporter/Importer

2010

International

About Company

Xiamen Bestlink Factory Co., Ltd., located in Xiamen City, South of China. We are a professional rock drilling manufacturer in research, design, production, sales and management. we focus on advanced technology with a specialized technicians team. Our main products include: small hole drilling tools to big size DTH (down-the-hole) hammers and bits up to bits size 39” (998mm) in diameter. Our products are widely used in open-pit or underground mining, tunnelling, hydraulic engineering, bridge engineering, construction engineering, geotechnical engineering and other field. Our products have been used in China and exported to more than 45 countries and areas all over the world. We have all kinds of CNC lathes, milling machines, grinders and other advanced machining equipments which greatly increase the accuracy of our products. Automatic control furnace with multipurpose, deep well furnaces with diameter of 2.5 meters and other heat treatment equipments ensure the reliability of products. Ultrasonic flaw detector and other international top testing equipments strengthen the good quality. As a council member of China Drilling Steel and Drilling Tools Association, we always guide ourselves with the service concept “focus on users’ requirements and meet customers’ need”, flexibly apply the unique technology, strictly comply with the standard of ISO9001 quality system, professionally commit to research, development and application, and sincerely produce the rock drilling tools with most specifications, easy operation, reliable quality and competitive price for all global users. With strong technical strength, we are making effort to create the best brand of Chinese drilling tools, and to be the top manufacturer in the world.. view more »

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