EXPANSION SHELL BOLTS

• KE-3W, KE3-2K

Intended use

• KE-3W and KE3-2K reinforced expansion shell bolts are designed to be used for roof and ribs support in mine working areas as an independent or secondary bolting support system. They are also used for the attachment of various components of mining equipment.

Technical description

• The following rods can be used in KE-3W and KE3-2K expansion bolts:

Bolt rods are made of plain AP 600 steel bar of ø18,3 mm according to ZN-97/AP-2 standard.

• The rods vary in terms of shape and size of swelling at the bottom.
• KE-3W and KE3-2K expansion shells of ø36 mm are the elements which set the bolt in the hole. The KE-3W shell consists of 3 serrated leaves and one plug while the KE3-2K shell consists of 3 serrated leaves and 2 plugs.
• The following washer plates can be used with the bolts: square, square with a side hole, round, triangular and octagonal. The washer plates differ in press forming method and thickness.
  The washers may have a conical or flat hole.
  Washers with a side hole of ø 15 can be used for attaching elements of mining equipment. They should be used if there is no hole in the rod.
  All the washers are made of 6mm plate.

Technical data

Installation procedure

• Drill a hole of ø38 ± 0,5mm in diameter and length equal to the length of the bolt. Reassemble the bolt by placing the washer and shell on the rod.
  Place the boltin the hole and push until the washer rests against the rock surface. Turn the rod and as a result the shell expands in the hole. Tighten the bolt by applying at least 250 Nm torque in order to obtain the prestress of at least 30kN.