R25 42mm Rock Bolting Self-Drilling Anchor Bolts

R25 42mm Rock Bolting Self-Drilling Anchor Bolts

Name: Hollow Anchor Rod
Uploaded: 2024-07-01T06:24:02+08:00
Description: During the construction of undergroud works, it is very common to encounter soft rock, fractured zone and large

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Payment Type:	L/C,T/T,D/P
Incoterm:	FOB,CFR,CIF,EXW
Transportation:	Land,Ocean,Express
Port:	Tianjin,Qingdao,Shanghai

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Product Description

Product Attributes

Model No.: 40Cr

Standard: Bs, Gb, Astm, Jis, Din, Api

Material: A53-A369, Q195-Q345, 10#-45#, 16mn, St35-St52, Cr-Mo Alloy

Section Shape: Round

Place Of Origin: China

Application: Fluid Pipe, Structure Pipe

Production Process: Cold Rolled

Certification: Api, Ce

Special Tube: Api Pipe

Whether Alloy: Is Alloy

Tolerance: ±1%

Category: Seamless Steel Pipe

Processing Service: Cutting, Punching, Decoiling, Welding, Bending

Packaging & Delivery

Selling Units	:	Ton
Package Type	:	Standard marine packaging, or as required by the customer
Picture Example	:

Hollow Anchor Rod

Full Threaded Steel Self Drilling Anchor Bolt

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Product Description

During the construction of undergroud works, it is very common to encounter soft rock, fractured zone and large deformation due to high ground stress. In the case of serious collapsing, extra-long anchor is needed instead of ordinary one.

Self-drilling anchor embodies drilling, grouting and anchoring as a whole.

Widely used as an efficient anchoring means, in tunnel pre-support, slope, coast, mine, water conservancy projects, building foundation, roadbed reinforcement and geological diseases treatment such as landslip, crack, sink age. It's irreplaceable in narrow construction environment.

Self Drilling Anchor Bolt

Product Specification

	Outer side diameter	Average internal diameter	Effective external diameter	Aver.eff. Cross sectional area	Ultimate load capacity	Yield load capacity	Average tensile strength Rm	Average yield strength Rp0.2	Theorical weight	Thread type
	mm	mm	mm	mm²	KN	KN	N/mm²	N/mm²	KG/m	Thread type
R25N	25	14	23	244	210	150	805	660	2.4	ISO10208
R32N	32	18.5	29.1	396	280	230	720	560	3.4
R32S	32	15	29.1	488	360	280	740	570	4.1
R38N	38	19	35.7	717	500	400	700	540	6.5
R51L	51	36	47.8	776	550	450	690	580	7.8
R51N	51	33	47.8	939	800	630	840	670	9.8	ISO1720
T76N	76	51	76	1835	1600	1200	880	660	15.0
T76S	76	45	76	2400	1900	1500	790	630	19.7
T30/11	30	11	30		260		320		3.2
T40/16	40	16	40		425		540		5.5
Anchor plate	120mm120mm6mm			150mm150mm8mm			200mm200mm10mm
Anchor nut	SW41*H35			SW46*H45			SW65*H55
Coupling	D35*L150		D41*L160	D55*L170			D64*L120
Drill Bit	According to different condition, choose alloy,steel Bit, custom design is available.

Product Display

We can produce different sizes, thicknesses, widths and materials according to your requirements

Hollow Anchor Bar

Technology Process

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.

1. Connect the alloy drill and Anchor Rod one end, on the other end, connect the drill sleeve and shank adapter, then connect the drilling rig or hand-held drill. Then start drilling, fill the cooling water while drilling.( If you want to lengthen the anchor rod, can connect the coupling, and then drilling)

2. Take down the drill, put the stop-grouting plug into the rod, and insert it to the hole, then ready to grout. Special circumstances like surrounding rock grouting tension is over or surrounding rock is too broken, can use anchor agent to seal the hole.

3. Connect quick grouting coupling and anchor rod end, connect other end of grouting machine.

4. Start grouting, when grouting full and reach design value then power off. Grouting pressure according to the design parameters and grouting machine performance determine, Cement/sand reference values is 1:0 ~ 1:1, water/cement reference value is 0.45:1 ~ 0.5:1.

5. Install anchor plate and nuts, and tighten nuts.