Friction Bolt – 33mm

Key Features

• The DSI Underground Friction Bolt is manufactured from high strength steel tube which has a slot along its entire length. A ring, or collar, is welded on the outer end to hold a domed plate to the rock surface.
• The 33mm Friction Bolt is suitable for installation with hand held rock drills (stoppers/drifters).
• Friction bolts can be load tested by fitting a special ring to the bolt prior to its installation. Pull tests can then be conducted with a hollow ram hydraulic jack.
• Further corrosion protection can be provided by hot dip galvanizing.