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-The Upgrade Expansion Bolt Swellex Type is a friction bolt made from pressed steel tubing.
-Upgrade Expansion Bolt Swellex Type expands and unfolds in the rock hole through the pressure of water.
-The installation is convenient and fast and can provide uniform support for the rock strata.
-It is suitable for rock strata under various conditions.
Key Features
Quick and easy to install
No resin or grout required
Not affected by blasting vibrations and rock strength
Wide expansion range and load distributed evenly over entire length of hole
Provides immediate support
Two designs of Upgrade Expansion Bolt Swellex Type
> Upgrade Expansion Bolt Swellex Type
> New improved Bolt with non-return valve which limits "spring-back" giving increased pull-out resistance and keeps high strength expansion.
| Item Description | Tube Thickness (mm) | Inflated Bolt Dia (mm) | Drill Hole Dia (mm) | Minimum UTS (mm) | Elongation% | Mass/Meter |
| 27mm | 2 | 41 | 35-38 | 120 | 10 | 2kg/m |
| 27mm | 2 | 54 | 45-51 | 160 | 10 | 2.8kg/m |
| 37mm | 3 | 54 | 45-51 | 240 | 10 | 3.75kg/m |
> Upgrade Expansion Bolt Swellex Type Accessories
> Upgrade Expansion Bolt Swellex Type Length
Length: 0.9m to 3.0m or as requested.
> Surface: Black / Plastic coated / Thermal Diffused or as requested.
