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Minova Weldgrip
Self Drilling Steel Anchor System
Weldgrip Products

- Machinery

- Universal Grout System
- AM1000-1 Thixotropic Grout
- Grout Pump Systems
- Turmag Drilling Machine
- Gopher Drilling Machine

- Reinforcement

- Self Drilling Steel Anchor System
- Composite Self Drilling Soil Nails
- Gripforce® Composite Soil Nails & Rockbolts
- FT500 Fully Threaded Composite Bar & Tube
- ATB700 Fully Threaded Bar & AT Rockbolts

- Ancillaries


- Drill Bits
- Drill Steels

- Mesh Products

- Double Twisted Hexagonal PVC Coated Mesh
- Gabions & Mattresses

Weldgrip Case Studies
- Dawlish Cliff Stabilisation
- Ramsden Bellhouse & Kent Hill
- Flood Risk Management
- Boness Embankment Stabalisation
- A259 Road Stabilization
- Doveholes Stabilisation
- Kingsand Sea Defence
- Lancaster Canal
- Coalfields Link
- Whitehaven Harbour
- Blaston Hollow
- A638 Rocknetting
- Chatham Dock
- Tondu Iron Works
- Brokenberry Quarry
- A5 - North Wales
- The Sidmouth Cliffs
- Conway Castle
- Glenholt Tunnel
- Athens Metro
- The Bradway Tunnel
- PorthKerry Tunnels
- Conisbrough Tunnel
- Face Salvage
- Mesh Cage System



 




 

 

 
  Self Drilling Steel Anchor System

The Weldgrip Self-Drilling Steel Anchor System is designed for use in various 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 rope threaded 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.

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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 anchor
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Technical Information R25 R32 R38 R51
Effective Outer Diameter (mm) 25 32 38 51
Effective Outer Diameter (mm) 22.5 29.1 35.7 47.8
Average Inner diameter (mm)     12 17.5 19 33.0
Average Effective Cross Sectional Area (mm˛)    284 425 717 939
Average U.T.S (kN)  208* 308* 500 800
Yield Load (kN)  150* 250* 400 630
Weight (Kg/m)      2.8 3.65 6 8.5
Steel Grade 37Mn5  
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
R51 63R51/1.0 63R51/2.0 63R51/3.0 63R51/3.0 63R51/6.0

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 500 kN* 50A.F. 50 0.42 63R38NUT
R51 690 kN* 75A.F. 75 2.1 63R51NUT

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
R51 >690 kN 64 200 2.0 63R51COUPLING

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 63R25/2.0/G 63R25/3.0/G 63R25/4.0/G 63R25/6.0/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
R51 63R51/2.0/G 63R51/3.0/G 63R51/4.0/G 63R51/6.0/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 500 kN* 50A.F. 50 0.42 63R38NUT/G
R51 690 kN 75A.F. 75 2.1 63R51NUT/G

* The above R38 Nut is straight sided hexagonal - not domed.

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
R51 >690 kN* 64 200 2.0 63R51COUPLING/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 63STL300X12G
Other sizes made to customer requirements.    


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

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Centralizers
Increases choice of Drill Bit Diameter
Thread 0/D Part Number
R32-R38 75mm 63R38R32/75CENT
R32-R38 92mm 63R38R32/92CENT
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Drill Bit Adaptors
Increases choice of Drill Bit Diameter
Thread Part Number
R25-R32 63R25ADAPT/R32
R32-R38 63R32ADAPT/R38

  Drill Bits and Adaptors

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Stepped Clay Bit
Strata usage: Clay, Sand, Loose Ground & Fill
Thread Bit Diameter mm Part Number
R32 75mm
90mm
63R32CLAY/75
63R32CLAY/90
R38 90mm
110mm
150mm
63R38CLAY/90
63R38CLAY/110
63R38CLAY/150
R51 150mm 63R51CLAY/150
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Steel Arching Bit
Strata usage: Chalks, Marls, Fills & Weak Mudstones
Thread Bit Diameter mm Part Number
R32 75mm 63R32SAB/75
R38 75mm 63R38SAB/75

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Tungsten Carbide Arching Bit
Strata usage: Consolidated Fills & Competent Ground
Thread Bit Diameter mm Part Number
R32 75mm 63R32TCARB/75
R38 75mm
110mm
63R38TCARB/75
63R38TCARB/

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Hardened Cross Head 58/62 HRC
Strata usage: Chalks, Marls, Fills & Weak Mudstones
Thread Bit Diameter mm Part Number
R25 42mm
51mm
63R25BIT/42EX
63R25BIT/51EX
R32 51mm
76mm
100mm
63R32BIT/51EX
63R32BIT/76EX
63R32BIT/100EX
R38 76mm
90mm
100mm
63R38BIT/76EX
63R38BIT/90EX
63R38BIT/100EX

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Tungsten Carbide Cross Head Bit
Strata usage: Strong Rock & Concrete
Thread Bit Diameter mm Part Number
R25 42mm
51mm
63R25BIT/42EXX
63R25BIT/51EXX
R32 51mm
76mm
63R32BIT/51EXX
63R32BIT/76EXX
R38 76mm
90mm
100mm
110mm
63R38BIT/76EXX
63R38BIT/90EXX
63R38BIT/100EXX
63R38BIT/110EXX
R51 115mm 63R51BIT/115EXX
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Tungsten Carbide Conical Bit
Strata usage: Consolidated Fills & Competent Ground
Thread Bit Diameter mm Part Number
R32 75mm 63R32BIT/75CP
R38* 100mm 63R38BIT/100CP

* This Bit is suitable for use with the R32-38 Bit adaptor

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Button Bit (9 Tip)
Strata usage: Competent Ground & Strong Rock
Thread Bit Diameter mm Part Number
R32 75mm 63R38B75/9
R38 75mm
90mm
110mm
63R38B75/9
63R38B90/10
63R38B110/14
R51 115mm 63R51B115/16

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Steel Drop Centre Bit
Strata usage: Fills
Thread Bit Diameter mm Part Number
R32 76mm
90 mm
63R32DC/C/76
63R32DC/C/90
R38 76mm
90 mm
63R38DC/C/76
63R38DC/C/90

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Tungsten Carbide Drop Centre Bit
Strata usage: Competent Ground & Strong Rock
Thread Bit Diameter mm Part Number
R32 76mm
90 mm
63R32DC/TC/76
63R32DC/TC/90
R38 76mm
90 mm
63R38DC/TC/76
63R38DC/TC/90

 

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