Expansion Shell Bolts Type KR-1 and KR-2

Expansion shell type KR-1/Ø25-M18 and KR-2/Ø25-M18 are designed to be used for roof and ribs support in mine working areas as an independent or auxiliary roof support system. They are also used for the attachment of various components of mining equipment.

KR-1/Ø25-M18 and KR-2/Ø25-M18 expansion shells of ø25 mm diameter are elements fixing the bolt in the hole. KR-1/Ø25-M18 shell consists of one shell sleeve and one expander, while KR-2/Ø25-M18 shell consists of two shell sleeves and two expanders.

The bolt rods are made of plain AP 600 steel bar of ø18.3 mm in accordance with ZN-97/AP-2 standard. The rods vary in terms of shape and size of the forged head. The upper part of the rod ends with a rolled M18 thread.

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  • Dimensional diversity of the length of the expansion shell
  • Fast bolting system
  • Small borehole diameter used for installation - 25.4 mm
Product Features
  • Used for mining applications
  • Simple and easy installation
  • Various solutions of bolt forged heads
  • Various plate versions available
  • KR-1/Ø25-M18 and KR-2/Ø25-M18 expansion bolts have a Certificate of Conformity No. 68/4/2017 issued by "INOVA" Technical Innovation Centre Ltd. in Lublin, Poland