Expandable Friction Bolt:
Expandable Friction Bolt is made by high strength welded tube folded itself and welded to seal at both end of bolt.when installed it,the folded wall of bolt is forced to expand by injected water and creates a big friction bearing strength for supporting.
Features：
1. Simple installation by water pressure.
2. No resin or grout required.
3. Fast, simple, safe immediate rock support.
4. Full length support.
5. High performance in hard, fractured and soft rock.
6. With high supporting strength.
SPECIFICATION:
|
Item No. |
Diameter |
Thickness |
Expanded Diameter |
Bushing Head Diameter |
Min Breaking Load |
Expansion Pressure |
Minimum Elongation |
|
ATEF120C |
28mm |
2mm |
41mm |
30/36mm |
120KN |
300bar |
10% |
|
ATEF120S |
28mm |
2mm |
41mm |
30/36mm |
140KN |
300bar |
10% |
|
ATEF160C |
38mm |
2mm |
54mm |
41/48mm |
160KN |
240bar |
10% |
|
ATEF160S |
38mm |
2mm |
54mm |
41/48mm |
180KN |
240bar |
10% |
|
ATEF240C |
38mm |
3mm |
54mm |
41/48mm |
240KN |
300bar |
10% |
|
ATEF240S |
38mm |
3mm |
54mm |
41/48mm |
270KN |
300bar |
10% |