R38 Self-Drilling Anchor Bolt
The R38 Self-Drilling Anchor Bolt offers multiple wall thickness and inner diameter options, allowing flexible selection according to different rock mass stress levels and load requirements.
Introduction
The R38 Self-Drilling Anchor Bolt offers multiple wall thickness and inner diameter options, allowing flexible selection according to different rock mass stress levels and load requirements. It provides an excellent balance between high strength and cost efficiency, meeting a wide range of applications from conventional ground support to reinforcement of extremely high-stress rock formations.
Product Specifications
Hollow Anchor Bar
| Size | Outer Dia. | Ultimate Load | Yield Load | Weight | |||||
| mm | in | kN | kips | kN | kips | kg/m | lbs/ft | ||
 |
SSR38N | 38 | 1.50 | 500 | 113 | 400 | 90 | 5.50 | 3.70 |
| SER38N1 | 38 | 1.50 | 500 | 113 | 400 | 90 | 4.95 | 3.33 | |
| SER38S | 38 | 1.50 | 550 | 124 | 450 | 101 | 5.90 | 3.96 | |
| Note： 1. Customized products are available based on your specific requirements； 2. 1mm=0.03937in 1kN=0.225kips 1MPa=0.1450377ksi 1kg/m=0.672 lbs/ft |
|||||||||
Coupler
| Size | Outer Dia. | Length | Weight | Note | |||||
| mm | in | mm | in | kg | lbs | ||||
 |
SSR38 | 51 | 2.01 | 180 | 7.09 | 1.33 | 2.93 | With sealing ring | |
| 51 | 2.01 | 200 | 7.87 | 1.50 | 3.30 | ||||
| 51 | 2.01 | 220 | 8.66 | 1.67 | 3.67 | ||||
| SER38 | 51 | 2.01 | 180 | 7.09 | 1.38 | 3.04 | Without sealing ring | ||
| 51 | 2.01 | 200 | 7.87 | 1.55 | 3.41 | ||||
| 51 | 2.01 | 220 | 8.66 | 1.68 | 3.70 | ||||
Hex Nut
| Size | Key Size | Length | Weight | Note | |||||
| mm | in | mm | in | kg | lbs | ||||
 |
SSR38 | 50 | 1.97 | 60 | 2.36 | 0.47 | 1.03 | Heat treatment | |
| 50 | 1.97 | 70 | 2.76 | 0.55 | 1.21 | ||||
Domed Nut
| Size | Key Size | Length | Weight | Note | |||||
| mm | in | mm | in | kg | lbs | ||||
 |
SSR38 | 52 | 2.05 | 60 | 2.36 | 0.61 | 1.34 | Heat treatment | |
| SSR38 | 52 | 2.05 | 70 | 2.76 | 0.74 | 1.63 | Heat treatment | ||
Domed Plate
| Size | Dimensions | Thickness | Hole Dia. | Weight | |||||
| mm | in | mm | in | mm | in | kg | lbs | ||
 |
SER38 | 150×150 | 5.91×5.91 | 8 | 0.31 | 41 | 1.61 | 1.38 | 3.04 |
| 150×150 | 5.91×5.91 | 10 | 0.39 | 41 | 1.61 | 1.73 | 3.81 | ||
| 200×200 | 7.87×7.87 | 10 | 0.39 | 41 | 1.61 | 3.10 | 6.82 | ||
| 200×200 | 7.87×7.87 | 12 | 0.47 | 41 | 1.61 | 3.60 | 7.92 | ||
| 200×200 | 7.87×7.87 | 16 | 0.63 | 41 | 1.61 | 4.88 | 10.74 | ||
Centralizer
| Size | Outer Dia. | Length | Weight | ||||
| mm | in | mm | in | kg | lbs | ||
 |
SER38 | 72 | 2.83 | 30 | 1.18 | 0.30 | 0.66 |
| 78 | 3.07 | 30 | 1.18 | 0.28 | 0.62 | ||
| 84 | 3.31 | 30 | 1.18 | 0.36 | 0.79 | ||
Drill Bit
| Size | Outer Dia. | Application (Advice) | ||||||
| mm | in | |||||||
 |
EX | Sand, fills, gravel | ||||||
| SSR38/76 | 76 | 2.99 | ||||||
| SSR38/90 | 90 | 3.54 | ||||||
| SSR38/100 | 100 | 3.94 | ||||||
| SSR38/110 | 110 | 4.33 | ||||||
| SSR38/115 | 115 | 4.53 | ||||||
 |
EX(Venturi) | |||||||
| SSR38/76 | 76 | 2.99 | ||||||
| SSR38/90 | 90 | 3.54 | ||||||
 |
EXX | Softer sedimentary rocks such as marls, mudstones, siltstone | ||||||
| SSR38/65 | 65 | 2.56 | ||||||
| SSR38/76 | 76 | 2.99 | ||||||
| SSR38/90 | 90 | 3.54 | ||||||
| SSR38/100 | 100 | 3.94 | ||||||
| SSR38/115 | 115 | 4.53 | ||||||
| SSR38/130 | 130 | 5.12 | ||||||
 |
EXX(Venturi) | |||||||
| SSR38/56 | 56 | 2.20 | ||||||
| SSR38/76 | 76 | 2.99 | ||||||
| SSR38/90 | 90 | 3.54 | ||||||
 |
Clay Bit | Clay, soft soil, marls, loose sand or gravel | ||||||
| SSR38/76 | 76 | 2.99 | ||||||
| SSR38/90 | 90 | 3.54 | ||||||
| SSR38/100 | 100 | 3.94 | ||||||
| SSR38/110 | 110 | 4.33 | ||||||
| SSR38/115 | 115 | 4.53 | ||||||
| SSR38/130 | 130 | 5.12 | ||||||
| SSR38/150 | 150 | 5.91 | ||||||
 |
ES-F | Gravel, soft rock | ||||||
| SSR38/76 | 76 | 2.99 | ||||||
| SSR38/90 | 90 | 3.54 | ||||||
| SSR38/100 | 100 | 3.94 | ||||||
| SSR38/115 | 115 | 4.53 | ||||||
 |
ESS-F | Weathered rock, stone walls, rubble | ||||||
| SSR38/64 | 64 | 2.52 | ||||||
| SSR38/76 | 70 | 2.76 | ||||||
| SSR38/76 | 76 | 2.99 | ||||||
| SSR38/90 | 90 | 3.54 | ||||||
| SSR38/100 | 100 | 3.94 | ||||||
| SSR38/115 | 115 | 4.53 | ||||||
 |
EYY | Competent ground, strong rock | ||||||
| SSR38/76 | 76 | 2.99 | ||||||
| SSR38/90 | 90 | 3.54 | ||||||
| SSR38/115 | 115 | 4.53 | ||||||
 |
EY | Competent ground, strong rock | ||||||
| SSR38/76 | 76 | 2.99 | ||||||
| SSR38/90 | 90 | 3.54 | ||||||
| SSR38/115 | 115 | 4.53 | ||||||
| SSR38/130 | 130 | 5.12 | ||||||
 |
EC | Chalks, marls, fills, competent ground | ||||||
| SSR38/76 | 76 | 2.99 | ||||||
 |
ECC | Chalks, marls, fills, competent ground | ||||||
| SSR38/76 | 76 | 2.99 | ||||||
 |
XX | Sand, clay, fills, gravel | ||||||
| SSR38/110 | 110 | 4.33 | ||||||
| SSR38/130 | 130 | 5.12 | ||||||
| SSR38/150 | 150 | 5.91 | ||||||
 |
ESS-D | Weathered rock, stone walls, rubble | ||||||
| SSR38/100 | 100 | 3.94 | ||||||
| SSR38/115 | 115 | 4.53 | ||||||
Features
1. Comprehensive Drill Bit Options for Various Geological Conditions
The R38 self-drilling anchor bolt is equipped with a complete range of drill bit options, covering various types designed for different ground conditions, including hard rock, soft rock, fractured rock masses, gravel and cobble formations, and water-rich geological conditions.
This enables a versatile “one anchor bolt with multiple drill bit options” construction approach, improving adaptability and reducing the need for frequent equipment changes during complex projects.
2. Customizable Combination Solutions
The combination of the R38 self-drilling anchor bolt and drill bit can be customized according to specific project requirements.
It can meet the needs of permanent support in deep-buried tunnels, while also being suitable for deep-hole anchoring in high slopes and deep foundation pits. In addition, customized solutions such as special anti-corrosion coatings, customized lengths, and other personalized configurations are available to adapt to various complex engineering applications.
