GB 50086-2015 40cr JIS SCR440 ASTM5140 ISO 41cr4 Hot Rolled Hollow Grouting Anchor Rod Rock Bolts Hollow Bolts

• Type: Seamless
• Technique: Hot Rolled
• Material: Carbon Steel
• Surface Treatment: Black
• Usage: Machinery Industry, Construction & Decoration, Special Purpose
• Section Shape: Round
• Tolerance: +0/-0.2mm
• Heat Treatment: Annealed
• Yield Strength: >125kn
• Tensile Strength: >180kn
• Color: Silver, Black, Red, Blue
• Transport Package: Standard Seaworthy Packing
• Specification: Can be customized
• Trademark: YF Steel
• Origin: Tianjin, China
• Production Capacity: 10000tons/Month

Product Description

Product Description

 

 

Product Name	Hollow bolts / Rock bolts / Hollow grouting anchor rod / grouted hollow anchor bar
Standards	GB1499.2-2007 GB 50086-2015 TB/T 3209-2008
Grades	Carbon	45#, sae1045, aisi1045
	Alloy	40Cr, JIS SCr440, ASTM 5140, ISO 41Cr4
Certificate	We are SGS approved enterprise, we issue MTC and be responsible for the quality.
Outside diameter	25mm, 25.4mm, 28mm, 28.3mm, 30mm, 32mm, or as per required
Thread standard	ISO
Tolerance for OD	+0mm/-0.2mm
Length	4-12m fixed length, or as per the required
Surface treatment	Black / oiled, or as per required.
Heat treatment	Annealed
Test	Ultrasonic test
Packing	Wrapped by steel strips, wrapped by steel strips
Application	Surrounding rock system shoring and supporting
Shipping term	In bulk / FCL / LCL, partial shipment allowed
Shipping port	Qingdao, or Tianjin port
Third party inspection	Acceptable
Trade term	CIF, CFR, FOB, EXW
Delivery time	Within 7 days for stocks supply.
Paying term	30%TT + 70% TT against copy of documents, or 30%TT + 70% LC.
Brand name	Yf steel

 

Advantage & Function

1. Immediately initial stage support for rock, control the surrounding rock being out of shape, guarantee the stability of surrounding rock.
 

2. Compared with solid rebar bolts, medium hollow design, makes the hollow bolts get the function of grouting pipe, it well avoids the waste and running off of mortar when grouting pipe pull out form the rock layer under traditional technology.
 

3. Mortar injecting well filled, what is more it can reaching goal of pressure mortar injection, finally the quality of project is improved.
 

4. Due to each accessories or parts effecting, the bolt neutral peculiarity is good. The mortar can fill every surface part of the hollow bolts, so the bolts get rid of being rusty, finally we get the goal of long term protection and supporting for rocks.

Anchor Bar

 

	R25N	R32N	R32S	R38N	R51L	R51N	T76N	T76S
Outside diameter (mm)	25	32	32	38	51	51	76	76
Internal diameter (mm)	14	19	16	19	36	33	52	45
Ultimate load capacity (KN)	200	280	360	500	550	800	1600	1900
Yield load capacity (KN)	150	230	280	400	450	630	1200	1500
Tensile strength, Rp0.2 (N/mm2)	800	800	800	800	800	800	800	800
Yield strength, Rp0.2 (N/mm2)	650	650	650	650	650	650	650	650
Weight (Kg/m)	2.3	3.2	3.6	5.5	6.5	8.0	16.0	19.7
Thread type (left-hand)	ISO 10208				ISO 1720		MAI T76 Standard

R thread anchor bar or called rock rod, 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.
Thread size: R25, R32, R38, R51, T76.
Thread standard: ISO10208, ISO1720 etc.

Anchor Plate

	R25N	R32N	R32S	R38N	R51L	R51N	T76N	T76S
Dimention (mm)	150*150	200*200	200*200	200*200	200*200	250*250	250*250	250*250
Thickness (mm)	8	10	12	12	20	40	40	40
Hole diameter (mm)	30	35	35	41	60	60	80	80
Weight (KG/PC)	1.4	3	3.7	3.6	8.8	18.5	18	18
Cold deformed with geometry

Anchor Coupling

	R25N	R32N	R32S	R38N	R51L	R51N	T76N	T76S
Outside diameter (mm)	35	42	42	52	63	63	95	95
Length (mm)	120	145	160or190	180	180	200	200	200
Weight	0.45	0.7	0.75	1.4	1.7	1.9	6.4	6.4
Machined steel coupling middle stop

The hollow bar is continuously threaded, it can be cut and coupled anwhere along its length.
The coupling enables direct end-to-end energy transmission between each bar, reducing losses and ensuring maximum percussive engergy at the drill bit.

Drill Bit

	R25N	R32N	R32S	R38N	R51L	R51N	T76N	T76S
Diameter (mm)	41,51	51,76,90		90,100,110,115,130			130,150,160,180,200
Hardened cross bit (EX)	Hardened cross bit for loose to medium dense condition with small boulders.
Tungsten cross bit (EXX)	TC cross bit for soft to medium rock for mations
Hardened button bit (ES)	Hardened buuton bit for unconsolidated rock with boulders.
Tungsten carbon button bit (ESS)	Button bit with TC inserts for medium rock for formations.
Hardened arch bit (EC)	Hardened drill bit with optimized geometry for uncon solid dated soil with small boulders.
Tungsten carbon arch bit (ECC)	TC drill bit with optimized geometry for soft to medium rock formations.
Hardened drop center bit (EY)	Hardened cross bit for loose to medium dense ground conditions
TC drop center bit (EY)	TC drill bit for soft to medium rock formations.
Casting clay bit (EW)	Casting clay bit with optimized geometry for very soft to soft caly.
Machined steel bit or Casring steel bit

The sacrificial drill bit is an important part of the self drilling anchoring system.
Choose suitable bits according to different soil type.

Anchor Nut

	R25N	R32N	R32S	R38N	R51L	R51N	T76N	T76S
Key size (mm)	41	46	46	50	75	75	100	100
Length (mm)	135	45	45	55	70	70	80	80
Weight (kg/pc)	0.25	0.35	0.35	0.5	1.55	1.55	3.6	3.6
Machined steel nut or casting steel nut

The hexagonal and spherical nuts are made from high precision steel (40Cr,HRC 20-25) to meet the stringent demands on anchor specifications and the daily uses of reinforcement work.
All nuts exceed the ultimate strength of the rod.

T-Thread Anchor Rod Technial Data

Bar Type	Outside Diameter (mm)	Inside Diameter (mm)	Cross section (mm2)	Ultimate Load KN	Yield Point KN	Weight (kg/m)	Thread Left/ Right Hand
30/11	30	11	446	320	260	3.3	Lift or right
30/14	30	14	395	260	220	2.9	Lift or right
30/16	30	16	382	220	180	2.7	Lift or right
40/16	40	16	879	660	525	7.0	Lift or right
40/20	40	20	726	539	430	5.6	Lift or right
52/26	52	26	1337	929	730	10.0	Lift or right
73/53	73	53	1160	1630	970	12.3	Lift or right
73/56	73	56	1094	1414	785	11.1	Lift or right
73/45	73	45	2265	1630	1180	17.8	Lift or right

T thread anchor bar surface with a trapezoidal thread, this design of connection is much stronger and reliable when compared with rope thread, we supply full sizes from T30 to T103.
Thread size: T30, T40, T52, T73, T103, T127, T130.
Thread standard: ISO10208, ISO1720 etc.
 

Product And Factory Display

 

Application Scope

During the constructions of underground 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.

Packaging & Shipping

The packaging is packaged in tarpaulins and wooden boxes to ensure that it will not rust and corrode in the process of encountering water.

FAQ

Q:What are the shipping ports?

A:Under normal circumstances, we ship from Tianjin, Qingdao ports, you can choose other ports according to your needs.

Q:About product prices?
A:Prices vary from period to period due to cyclical changes in the price of raw materials.

Q:How long does your delivery time take?
A:In general, our delivery time is within 7-45 days, and may be delayed if the demand is extremely large or special circumstances occur.

Q:Can I go to your factory to visit?
A:Of course, we welcome customers from all over the world to visit our factory.

Q:Does the product have quality inspection before loading?
A:Of course, all our products are strictly tested for quality before packaging, and unqualified products will be destroyed.