High quality, quick and easy installation
guaranteeing efficiency and safety


A Rock bolt is a steel rod used in tunnelling and underground mining. The tube has an omega shape and it is inserted in a hole drilled into the roof or walls of a rock formation to provide support to the roof or sides of the cavity. Once the rock bolt is inserted in the hole it is expandedusing a special pump and adapter which provide high pressure water flowinside the tube making the bolt being expanded inside the drilled hole. This process creates instant support and it has several advantages: safe, simple and clean installation, no previous operator experience required and it is very flexible depending de ground necessities.

Because of the high-quality properties of the steel we use (S355 MC) and the technology and automation of our production processes we guarantee the best quality and service.

Currently we provide three types of expend rock bolts: STANDARD, MIDI and SUPER. The main difference between them are the thickness, diameter and breaking load. You can see all the technical properties in the table.

Variable Lenght Up To 6000 mm 6000 mm 6000 mm
Tube Thickness 2mm 2mm 3mm
Original Pipe Diameter 41mm 54mm 54mm
Maximum Pipe Diameter 26mm 39mm 39mm
Recomm Drill Diameter 35-38mm 45-51mm 45-51mm
Minimum Breaking Load 120 kN 160kN 240kN
Weight 2 kg/m 2,7 Kg/m 3,9 kg/m
Raw Material Quality S 355-MC S 355-MC S 355-MC
Yield Strenght 100KN 120KN 220KN
Maximum Elogation 10-20% 10-20% 10-20%
Inflation Pressure 300bar 240bar 300bar
Front Bushing Diameter 28mm 38mm 38mm
Diameter of the Inflation Bushing 30mm 41mm 41mm
Recommended Plate 150x150x4 200x200x5 200x200x6

Product Application

We provide expand rock bolts to be used in tunnelling and underground hard rock mining ensuring the success and safeness of extracting and excavation processes.

Privacy Preferences

When you visit our website, it may store information through your browser from specific services, usually in the form of cookies. Here you can change your Privacy preferences. It is worth noting that blocking some types of cookies may impact your experience on our website and the services we are able to offer.

Click to enable/disable Google Analytics tracking code.
Click to enable/disable Google Fonts.
Click to enable/disable Google Maps.
Click to enable/disable video embeds.
Our website uses cookies, mainly from 3rd party services. Define your Privacy Preferences and/or agree to our use of cookies.