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Home > Product > Self Drilling Anchor Bolt System > R Thread Anchor System > Self-Drilling Anchor Bolt (R thread)
Self-Drilling Anchor Bolt (R thread)
R thread self drilling anchor bolt has sizes include R25, R32, R38, R51. It is suitable for broken rock and loose soil.
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Description
Introduction:

Self drilling anchor bolt combines drilling, grouting and anchoring together. It ensures the anchoring effect in complex ground conditions. 
It’s safe, reliable and efficient.
 
Application:

 
1. R thread self drilling anchor bolt is suitable for broken rock, loose soil and conditions which are difficult to drill holes, such as fracture zones, decayed rock, gravel, sandy gravel, backfill ground.
2. Used for permanent support for tunneling.
3. In slope stabilization, rock bolts and soil nails can be used to maintain and strengthen soil and rock.
4. Used for micro pile reinforcement. Micro pile can transmit structural load to foundation, and then limit the deformation of buildings.
5. Drill bits can be used for differently according to the rock conditions.
 
Features:

1. Casing free in the operation. 
Anchor bar is also a drill pipe which is convenient and time-saving.
2. Drilling and grouting can be done simultaneously. With good grouting spread radius and reliable anchoring quality, fractures can be filled effectively.
3. The anchor bar with standard full thread can be cut according to your requirement. The cut anchor bars can be connected by couplers. It’s suitable in narrow work space.
4. Due to the continuous R-thread and 
T-thread, self drilling anchor bolt has higher bonding stress.
Hex Nut        Spherical Nut     Centralizer
                        Hex Nut                                                               Spherical Nut                                             Centralizer  
 
Plate           Coupling   Drill Bit
                      Plate                                                                         Coupling                                                   Drill Bit
 
                                                                             
R -thread Hollow Anchor Bar
Size Outer Dia.
mm
Inner Dia.
mm
Ultimate Load  
KN
Yield Load 
KN
Weight
Kg/m
R25N 25 12 200 150 2.3
R32L 32 20 210 160 2.9
R32N/1 32 20 280 230 2.9
R32N 32 18 280 230 3.4
R32S/1 32 18 360 280 3.4
R32S 32 14.5 360 280 4.1
R38N/1 38 22.5 500 400 4.8
R38N/2 38 21 500 400 5.5
R38N 38 19 500 400 6
R38S/1 38 18 550 430 6.2
R51L/1 51 37.5 550 450 5.6
R51L 51 36 550 450 7
R51N/1 51 34 800 630 7.5
R51N 51 33 800 630 8.5



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