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Application

Expansion shell heads type KE-4W/M20 ; KE-4W/M24 ; KE4-2K/M20 ; KE4-2K/M24 Are parts of expansion Shell bolts and are designed as designed to be used for roof and ribs support in mine working areas as an independent or secondary bolting support system and for attachment of various components of mining equipment.

Technical specification

Expansion shell heads are elements which set the bolt in the borehole.
Head components are :

Head typeShellWedgeSpring ø 37
KE-4W/M20
KE-4W/M24
4 pcs 1 pcs 2 pcs

Head works with the rod of min 80 mm thread.

Head typeShellWedgeSpring ø 37
KE4-2K/M20
KE4-2K/M24
4 szt 2 szt 2 szt

Head works with the rod of min 170 mm thread.

Technical data

Expansion shell heads type KE-4W/M20 ; KE-4W/M24

SpecificationsValue
Head diameter ø 42 mm
Head length 93 mm
Wedge thread

M20 dla KE-4W/M20

M24 dla KE-4W/M24

Capacity min 100 kN

Expansion shell heads type KE4-2K/M20 ; KE4-2K/M24

SpecificationsValue
Head diameter ø 42 mm
Head length 136 mm
Wedge thread

M20 dla KE4-2K/M20

M24 dla KE4-2K/M24

Capacity 150 kN

 

Installation procedure

Drill a hole of ø44 ± 0,5mm in diameter and length equal to the length of the bolt.
Reassemble the bolt by placing the washer and head on the rod. Insert the bolt into the hole and push until the washer rests against the rock surface. Rotate 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.