GMA acts as a subcontractor of rock bolts and has produced more than 3 million rock bolts for other companies within the industry.
GMA currently has one of Europe's most modern and flexible factories for manufacturing rock bolts, with a capacity of over 500,000 bolts per year. Various lengths, designs of anchors, bolt dimensions, and threads can be provided, mainly in the dimensions 20mm (M22), 22mm (M24), and 25mm (M27), with right or left-hand threads and in lengths from 1800mm up to 3000mm*. Different designs of anchor points (groups of anchors) and numbers are made according to customer specifications.
With our own production of dome plates (washers) in various models and an extensive program of nuts, hemispheres, and wedges, GMA becomes a complete supplier of rock bolts.
Contact us for more information on what we can produce for you.
* If you want a longer bolt than 3000mm, bolts can be delivered in a joinable design.
Other: GMA manufactures and sells many accessories for rock bolts, including some different packers, and various dome plates (washers) for rock bolts, nuts, and hemispheres. See more under the section Accessories for rock reinforcement.