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Geo-Drill Injection Anchor System Accessories

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Couplings Hex Nuts
Hardened Washers Steel Bearing Plates
Centralizers Drill Bits
Couplings

The Geo-Drill Injection Anchor Couplings have a unique tapered center stop which seals the Injection Bar connection to prevent grout leakage during simultaneous grouting and drilling operations. The internal stop design also assures a full positive thread connection in both Injection Bar ends while providing a matching end bearing between bars that reduces percussion energy loss to the drill bit. The couplings are machined from ASTM A29 grade C1045 high strength steel to provide 100% ultimate tensile or compression strength capacity of the installed anchorage. The coupling OD is tapered on both ends to allow drill cuttings and grout displacement during drilling while the ID has internal chamfers to assist alignment and connection of the bars.

Geo-Drill Injection Anchor Coupling
Nominal Bar
Diameter
Outside
Diameter
Overall
Length
Part
Number
32 mm
(1-1/4”)
1-5/8”
(41 mm)
6-1/4”
(158 mm)
B7X2-32
38 mm
(1-1/2”)
2"
(51 mm)
7-5/8"
(194 mm)
B7X2-38
51 mm
(2”)
2-5/8"
(67 mm)
8-1/2"
(216 mm)
B7X2-51
76 mm
(3”)
3-7/8"
(98 mm)
9-7/8"
(251 mm)
B7X2-76
Hex Nuts
The Hex Nuts designed exclusively for the Geo-Drill Injection Anchor system are a full 100% ultimate tension or compression strength component. They are manufactured from a high strength steel complying with ASTM A108. Two nuts are normally used (above and below the plate) to secure the anchorage plate embedded in a foundation pour.
Geo-Drill Injection Anchor Hex Nut
Nominal Bar
Diameter
Outside
Diameter
Overall
Length
Part
Number
32 mm
(1-1/4”)
1-3/4”
(44 mm)
1-3/4”
(44 mm)
B7X3-32
38 mm
(1-1/2”)
2"
(51 mm)
2"
(51 mm)
B7X3-38
51 mm
(2”)
3"
(76 mm)
2-1/2"
(64 mm)
B7X3-51
76 mm
(3”)
4"
(102 mm)
4-1/4"
(108 mm)
B7X3-76
R9F Hardened Washers
Nominal Bar
Diameter
Outside
Diameter
Inside
Diamter
Thickness
Part
Number
32 mm
(1-1/4”)
2-1/4"
(57 mm)
1-3/8"
(35 mm)
5/32"
(4.0 mm)
R9F-10-436
38 mm
(1-1/2”)
3"
(76 mm)
1-5/8"
(41 mm)
5/32"
(4.0 mm)
R9F-12-436
51 mm
(2”)
3-3/4"
(95 mm)
2-1/8"
(54 mm)
7/32"
(5.6 mm)
R9F-16-436
76 mm
(3”)

5-1/2"
(140 mm)

3-1/8"
(79 mm)

5/16"
(7.87 mm)

R9F-24-436
Bearing Plates
Williams provides a large selection of bearing plates for the Geo-Drill Injection Anchors in ASTM A36 in grade 36 or ASTM A572 grade 50 steel. The bearing plate holes can be round for standard embedment applications or slotted for angled Injection Anchors installed through steel walers or in contact with a rock slope. We manufacture plates to any size specifications required by the project or Williams can design a bearing plate for your specific application.
Centralizers
Geo-Drill Injection Anchor Centralizer The bar can be centralized in the drill hole on 10' centers by attaching a steel centralizer in front of the coupling during the drilling operation. Available plain or hot dip galvanized to ASTM A123. State drill hole diameter and bar size when ordering.
Drill Bits
Hollow Bar Anchor Drill Bit HC HC Drill Bit
Hardened cross cut drill bit, suitable for the majority of applications including narrow bands of soft rock.
Soil Types: Fills and Medium Dense Gravels
Hollow Bar Anchor Drill Bit CC CC Drill Bit
Tungsten carbide cross-cut drill bit. Excellent choice for majority of granular soils with mixed hard formations.
Soil Types: Fills, Gravels, Shale & Seamy Rock Formations.
Hollow Bar Anchor Drill Bit SB SB Drill Bit
Two stage cross cut drill bit, suitable for loose ground and fills.
Soil Types: Sand, Clay and Medium Dense Clays
Hollow Bar Anchor Drill Bit CB CB Drill Bit
Tungsten carbide hemispherical button drill bit for moderately strong to strong rock, boulders and rubble.
Rock Types: Mudstone, Limestone, and Granite
Hollow Bar Anchor Drill Bit GB GB Drill Bit
Offset face cross cut drill bit suitable for drilling in cobbles with silt and gravel as well as sedimentary bedrock material.
Nominal
Bar
Diameter
Available Drill Bit Diameters
HC CC SB CB GB
32 mm
(1-1/4”)
2”
(51 mm)
2”
(51 mm)
4”
(100 mm)
2”
(51 mm)
4”
(100 mm)
2-1/2”
(65 mm)
2-1/2”
(65 mm)
3”
(76 mm)
3”
(76 mm)
3-1/2”
(89 mm)
3-1/2”
(89 mm)
4”
(100 mm)
4”
(100 mm)
38 mm
(1-1/2”)
2-1/2”
(65 mm)
2-1/2”
(65 mm)
5”
(127 mm)
3”
(76 mm)
4”
(100 mm)
3”
(76 mm)
3”
(76 mm)
3-1/2”
(89 mm)
3-1/2”
(89 mm)
6”
(150 mm)
4”
(100 mm)
4”
(100 mm)
51 mm
(2”)
- 3”
(76 mm)
6”
(150 mm)
4”
(100 mm)
6”
(150 mm)
3-1/2”
(89 mm)
8”
(203 mm)
4”
(100 mm
76 mm
(3”)
- 5”
(127 mm)
10”
(254 mm)
- -
6”
(150 mm)
7”
(175 mm)
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Geo-Drill
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Installation
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