Self-Drilling Anchor Tools

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Self-Drilling Anchor Tools

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Description

Specification Overview:

Anchor Rods:

Types	Outer Diameter	Average Internal Diameter	Effective External Diameter
Types	mm	mm	mm
R25N	25	14	23
R32N	32	18.5	29.1
R32S	32	15	29.1
R38N	38	19	35.7
R51L	51	36	47.8
R51N	51	33	47.8
T76N	76	51	76
T76S	76	45	76

Length: 1m, 1.5m, 2m, 2.5m, 3m, 3.5m, 4m, 4.5m, 5m, 5.5m, 6m

Drill Bits:

Anchor Type	Bit Size	Front Design
R25N	R25-42mm, R25-51mm	Cast Cross Bits, Steel Cross Bits, Steel 3-Cutter Bits, TC Cross Bits, TC 3-Cutter Bits, Steel Arched Bits, TC Arched Bits, Steel Button Bits, TC Button Bits
R32N & R32S	R32-51mm, R32-76mm
R38N	R38-76mm, R38-90mm, R38-115mm
R51L & R51N	R51-85mm, R51-100mm, R51-115mm
T76N & T76S	T76-130mm

Anchor Coupling Sleeves, Anchor Nuts & Anchor Plates:

Thread Type	Anchor Couplings		Anchor Nut		Anchor Plates (Square & Round)
	Diameter	Length	Hex. Diameter	Length	Hole Diameter	Dimension
	(mm)	(mm)	(mm)	(mm)	(mm)	(mm × mm × mm)
R25	38	150	35	35, 41	30	120 × 120 × 6, 150 × 150 × 8, 150 × 150 × 10, 150 × 150 × 8, 150 × 150 × 10, 200 × 200 × 8, 200 × 200 × 10, 200 × 200 × 12, 200 × 200 × 12, 200 × 200 × 30, 250 × 250 × 40, 250 × 250 × 60
R32	42	145, 160, 190	46	45, 65	35
R38	51	180, 220	50	50, 60	35, 40
R51	64	140, 220	75	70	60
T76	97	220	100	80	80

How to order?

Hollow Anchor Rods: Types + Length

Drill Bits: Head Design + Diameter + Thread

Coupling Sleeve: Diameter + Length + Thread

Nut: Length + Diameter

Plate: Shape + Dimension

General Introduction:

The self-drilling hollow bar anchor system consists of a hollow threaded bar with an attached drill bit that can perform drilling, anchoring and grouting in a single operation. The hollow bar allows air and water to freely pass through the bar during drilling to remove debris and then allow grout to be injected immediately after drilling is completed. Grout fills the hollow bar and completely covers the entire bolt. Couplings can be used to join hollow bars and extend the bolt length while nuts and plates are used to provide the required tension.

Self-drilling hollow bar anchor system is the most common used system for rock mass stabilization, especially in tunneling, underground mining and ground engineering industry. It is mainly used for the supporting engineering in the loose and broken rock stratal with difficult to drilling hole. It provides the optimal solution for soil nailing, lock bolting, micro-piling.

Self-drilling hollow bar anchor system fulfills current and increasing demands of the tunneling, mining industry and ground engineering for safer and faster production. The system provides advantages for all areas of its applications, where boreholes would require the time consuming drilling with casing systems in unconsolidated or cohesive soil.

Features and Advantages:

Particularly suitable for difficult ground conditions.

An efficient installation since drilling, placing and grouting can be performed in a single operation, saving both time and money.

Self-drilling system eliminates the requirement for a cased borehole in collapsing soils.

Fast, single-step anchoring system with simple equipment able to work with standard track drill (top hammer) or hand-held drilling equipment, eliminating the need for larger casing rigs.

Installation with simultaneous drilling and grouting possible, and post grouting system is simple.

Continuously drilling and grouting under high pressure causes the grout to permeate into looser soils and creates a bulb-effect for increased bond capacity.

Easy installation in all directions, also upwards, and similar installation methods for all ground conditions.

Suitable for working in limited space, height and in areas of difficult access.

Galvanizing for enhanced corrosion protection is available if necessary.

Multiple ranges of drill bits suitable for different ground conditions.

Continuously threaded bar pattern can be cut and coupled anywhere along its length to achieve all lengths.

Applications in Tunneling & Ground Engineering:

Radial bolting

Tunnel repair and refurbishment

Cliff and Slope stabilization and reinforcement

Fore poling

Micro injection pile

Face stabilization