Hollow core bolts

The DSI Hollow Bar System is a self-drilling, load-bearing solution for tunneling and geotechnical applications. It enables simultaneous drilling, installation, and grouting in a single operation—eliminating the need for casing or rod removal.

The Self-drilling Hollow Bar System R38 delivers fast, reliable drilling, grouting, and anchoring in one step, perfect for challenging ground conditions where safety, efficiency, and performance matter most.

The OneStep Self-Drilling Bolt is a rock bolt that integrates the drill head, drill steel, bolt, and adhesive resin into a single unit. The design streamlines the installation process by combining drilling, resin capsule insertion, and bolt setting into one step.

Engineered for demanding underground environments, the DSI Dynamic Hollow Bar Bolt delivers high dynamic capacity and energy absorption in seismic, squeezing and fractured ground. Available in Ø28 mm and Ø32 mm, its self-drilling design enables fast installation and grouting in a single operation, supporting safe and productive mine development.

Available in Ø28 mm and Ø32 mm, the DSI Ductile Hollow Bar Bolt provides exceptional deformability and reliable performance in squeezing and fractured ground. Its self-drilling design enables fast installation and grouting in a single operation, supporting efficient underground development and rehabilitation

Combining intelligent drilling and bolting equipment, advanced pumpable resins, resin capsules, and the DSI Hollow Bar System, Sandvik delivers a fully integrated ground support offering from a single source. Explore how our optimized systems help improve productivity and provide reliable rock reinforcement in even the most challenging ground conditions.

Mineral Bolt pumpable resin can be injected directly through the hollow bolt, enabling efficient installation, reliable grout distribution, and secure anchoring in challenging ground conditions. The result is faster bolting cycles, improved ground consolidation, and dependable long-term support.