Bit Drill for Ground Anchor R25/51mm Self Drilling Rock Anchor for Tunnel Support

Bit Drill for Ground Anchor R25/51mm Self Drilling Rock Anchor for Tunnel Support

Specifications of drilling bits R25/51mm

Thread:R25

Diameter:51mm

Left Hand

Hardness:HRC48-HRC55

Processing Type:Casting

Description:

The Self Drilling Anchor system is comprised of a hollow threaded anchor bar with a sacrificial drill bit that performs drilling, anchoring and grouting in a single operation. Self drilling anchor system is mainly used in slope stabilization, tunneling pre-support, foundations with micro piles etc projects.

Advantages and Characteristics as below:

1. No casings required, because anchor bars can be drilled into loose soils without needing casings to support the boreholes.

2. Fast drilling and installation, because drilling, installation and grouting are in a single operation.

3. Both rope threads and trapezoid threads are robust and ideal for rotary-percussive drilling and ensuring a high level of bond with the borehole gout.

4. The hollow core not only serves for flushing during drilling, but also for grouting after drilling.

5. Continuous threads ensure the bars can be cut and coupled at any point, or extended.

6. Different anchor bits are available for different ground conditions.

R thread anchor bar or called rock bolt, soil nail, which is a kind of threaded hollow bar, bar surface with an rope thread according to ISO 10208 & 1720. It was firstly invented by MAI on 1960S to solve the low construction speed on complicated underground works, nowadays; it is very popular all around the world.

Bits type:

Anchor bit diameter to choose:

Mining Tool B.D of O.E.D Machinery Grop, has been dedicated in development and production of mining drill rods and drill bits for many years, which forms six main series products: taper drill tools, thread drill tools, rotary drill tools, blast furnace frill tools, DTH drill tools, and coal mining tools. We can produce high quality of nearly hundreds of products, like hexagonal thread drill rod, extension rod, speed rod, DTH drill rod, blast furnace drill rod and so on, also shank adapter coupling sleeves, button bit, chisel bit, cross bit, etc.

Our products can be widely used in many basic energy construction projects, such as exploring new mountains, minerals, metallurgy, rail, highway, and water and electricity infrastructure etc.

Our member has stong capability of researching developing and advanced production technology. We have passed ISO9001 International Wuality System Certificate, we can provide superior standard drill tools and also customized drill tools.

Our Sales company, HUNAN GOLDEN GLOBE I AND E OED CO.,LTD., have over 20 years experience of export. We have exported the products to many countries.  Trust us that we can provide reliable service for you.

Why trust us and how to control the quality?

Let's me introduce our company.

We have three main workshops, heat treatment workshop, forging workshop and CNC workshop.

Material is very important for a good product. We have excellent heat treatment equipment to control the material quality. For each lot of products, we all have material certification. So even you have some special material requirement, we have best  solution for you. Do not hesitate to ask us if you have any question of material. Here's our heat treatment equipment.

Turning machine and grinding machine are also very important. we have advanced CNC machines and skillfull workers to keep the stable quality.

During production, we have engineer to check the dimensions. Our workers are highly trained and they will inspect the products after machining.

For the final inspection, we'll check the dimensions one by one to make sure the quality is qualifed. The inspection report will be sent to you before shipping if you have ordered our products. 

We have provided many solutions for different customers.

For example:

Our customer in Norway. They required a special hole of the drill bit to match their specific drill rod.

Our customer in Korea. We have changed the material of their skirt and carbide button bit to diminish the consumption of drill bit.

Our customer in Chile, We provided different length of drill rod as per their requirement.

Our customer in South Africa, new design of thread drill bit have been sent according to their application.

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Except regular products, we have the ability to design custom products to meet our customers' requirement. For different application, the solution is also different. So please send us your requirement and application, then we'll provide your best solution.

Quality is alway the most important things. Our price may not the cheapest, but we'll try to provide satisfied service and quality for you.

Devotion and Focus Makes Us Professional. Looking forward to working with you together.