Please check back regularly for product news.

Self Drilling Steel Anchor System

The Weldgrip Self-Drilling Steel Anchor System is designed for use in several applications, including tunnel repair and refurbishment and also slope and cliff face reinforcement. It provides the optimal solution for nailing, bolting, micro piling and as ground anchors for use in difficult ground and rock conditions.

The system comprises of high quality fittings matched to our seamless steel tube which is threaded to ISO 10208. The self-drilling system enables drilling and grouting of the anchor in one operation, making a saving in on-site and project time.

A wide range of accessories, including shank adaptors, adaptor couplers, anchor couplers and drill bits are available to suit most applications and, as with all Weldgrip products, access to our highly regarded technical support team is always available. Applications include:-

Tunnel reinforcement.
Tunnel refurbishment.
Cliff and Slope reinforcement.
Wall stabilisation.
Rocknetting retention.
Parapet Wall reinforcement.
Gabion Basket anchors

Technical Information	R25	R32	R38
Outer Diameter (mm)	25	32	38
Outer Diameter (mm)	22.5	29.1	35.7
Average Inner diameter (mm)	12	17.5	19
Average Effective Cross Sectional Area (mm²)	284	425	717
Average U.T.S (kN)	208*	308*	500
Yield Load (kN)	150*	250*	400
Weight (Kg/m)	2.8	3.65	6
Steel Grade 40Mn2 Standard Lengths 1m, 2m, 3m, 4m & 6m.

Threaded Tube Part Numbers

	1 meter long	2 meters long	3 meters long	4 meters long	6 meters long
R25	63R25/1.0	63R25/2.0	63R25/3.0	63R25/4.0	63R25/6.0
R32	63R32/1.0	63R32/2.0	63R32/3.0	63R32/4.0	63R32/6.0
R38	63R38/1.0	63R38/2.0	63R38/3.0	63R38/4.0	63R38/6.0

Domed Nuts

	Ultimate Tensile	Spanner Size	Length mm	Weight Kg	Part Number
R25	197 kN*	41A.F.	55	0.47	63R25NUT
R32	294 kN*	46A.F.	55	0.59	63R32NUT
R38	None Dome	50A.F.	50	0.42	63R38NUT

Coupling Sleeve

	Ultimate Tensile	Outside Dia. mm	Length mm	Weight Kg	Part Number
R25	>208 kN*	36	150	0.72	63R25COUPLING
R32	>308 kN*	42	160	0.89	63R32COUPLING
R38	>500 kN	50	220	1.70	63R38COUPLING

Steel End Plates

Size mm	Weight Kg	Part Number
150 x 150 x 8	1.4	63STL150X8
150 x 150 x 10	1.7	63STL150X10
200 x 200 x 8	2.5	63STL200X8
200 x 200 x 10	3.1	63STL200X10
200 x 200 x 12	3.7	63STL200X12
300 x 300 x 8	5.6	63STL300X8
300 x 300 x 10	7.0	63STL300X10
300 x 300 x 12	8.4	3STL300X12
Other sizes made to customer requirements.

*Tested In Accordance with MTP2. (Sheffield Testing Laboratories).

Galvanised Threaded Tube to BS EN ISO 1461: 1999 Part Numbers

	2 meters long	3 meters long	4 meters long	6 meters long
R25	63R252.0/G	63R253.0/G	63R254.0/G	63R256.0/G
R32	63R32/2.0/G	63R32/3.0/G	63R32/4.0/G	63R32/6.0/G
R38	63R38/2.0/G	63R38/3.0/G	63R38/4.0/G	63R38/6.0/G

Domed Nuts Galvanised to BS EN ISO 1461: 1999

	Ultimate Tensile	Spanner Size	Length mm	Weight Kg	Part Number
R25	197 kN*	41A.F.	55	0.47	63R25NUT/G
R32	294 kN*	46A.F.	55	0.59	63R32NUT/G
R38	None Dome	50A.F.	50	0.42	63R38NUT/G

Coupling Sleeves Galvanised to BS EN ISO 1461: 1999

	Ultimate Tensile	Outside Dia. mm	Length mm	Weight Kg	Part Number
R25	>208 kN*	36	150	0.72	63R25COUPLING/G
R32	>308 kN*	42	160	0.89	63R32COUPLING/G
R38	>500 kN	50	220	1.70	63R38COUPLING/G

Steel End Plates Galvanised to BS EN ISO 1461: 1999

Size mm	Weight Kg	Part Number
150 x 150 x 8	1.4	63STL150X8G
150 x 150 x 10	1.7	63STL150X10G
200 x 200 x 8	2.5	63STL200X8G
200 x 200 x 10	3.1	63STL200X10G
200 x 200 x 12	3.7	63STL200X12G
300 x 300 x 8	5.6	63STL300X8G
300 x 300 x 10	7.0	63STL300X10G
300 x 300 x 12	8.4	3STL300X12G
Other sizes made to customer requirements.

*Tested In Accordance with MTP2. (Sheffield Testing Laboratories).

Steel and Galvanised Steel End Plates

Steel and Galvanised Steel Coupling Sleeves

Steel and Galvanised Steel Domed Nuts

Hardened Cross Head 58/62 HRC
Strata usage: Chalks, Marls, Fills & Weak Mudstones

Thread	Bit Diameter mm	Part Number
R25	42	63R25BIT/42EX
-	51	63R25BIT/51EX
R32	51	63R32BIT/51EX
-	76	63R32BIT/76EX
R38	76	63R38BIT/76EX
-	100	63R38BIT/100EX
-	110	63R38BIT/110EX

Tungsten Carbide Cross Head
Strata usage: Strong Rock & Concrete

Thread	Bit Diameter mm	Part Number
R25	42	63R25BIT/42EXX
-	51	63R25BIT/42EXX
R32	51	63R32BIT/51EXX
-	76	63R32BIT/76EXX
R38	76	63R38BIT/76EXX
-	100	63R38BIT/100EXX
-	110	63R38BIT/110EXX

Arching Button Bit
Strata usage: Fills & Chalk

Thread	Bit Diameter mm	Part Number
R38	76	63R38BIT/76EYY

Tungsten Carbide Conical Bit
Strata usage: Consolidated Fills & Competent Ground

Thread	Bit Diameter mm	Part Number
R32	75	63R32BIT/75CP
R38	100	63R38BIT/100CP

Drill Bit Adaptors
Increases choice of Drill Bit Diameter

Thread	Part Number
R25-R32	63R25ADAPT/R32
R32-R38	63R32ADAPT/R38

Download the Printable PDF Brochure

If you would like to print the brochure for more information on our soil nails and rockbolts please click on the download button.

You will need Adobe Acrobat Reader to view and print the brochure, if you need to download a free version of Acrobat Reader please click here.

Self Drilling Steel Anchor System

785 k

Soil Nail & Rockbolts

1.4 meg

Accessories

1.1 meg

Click on the BBA accreditation logo to download our BBA Certificate in Acrobat PDF format. If you do not have Adobe Acrobat Reader you can download it free here.