Application
Resin bolt type RM-20 i POK-22 are used for roof and ribssupport in mine working areas as an independent or additional roof support system. They are also used to suspend various components of mining equipment.Technical description
RM-20 bolt is a steel reinforcing bar of nominal diameter dn=20 mm, while POK-22 bolts have nominal rod diameter of dn=22 mm according to PN-82/H93215. They are made of 34GS steel.Bolt | Rod type - standard | Rod type - coupled |
---|---|---|
RM20 |
RM-20js RM-20ds RM-20js-k RM-20ds-k
|
RM-20js-dz RM-20ds-dz RM-20js-k-dz RM-20ds-k-dz
|
Bolt | Rod type - standard | Rod type - coupled |
---|---|---|
POK- 22 |
POK-22js POK-22ds POK-22pr POK-22r
|
POK-22js-dz POK-22ds-dz POK-22pr-dz POK-22r-dz
|
Technical data
Specifications | Value |
---|---|
Rod diameter |
dn = 20mm dla RM-20 dn = 22 mm dla POK-22 |
Thread |
M20 |
Thread lenght |
150 mm |
Overall rod length |
from 400 to 4000 mm |
Torque shearing the ø3 pin |
80 ÷ 120 Nm |
Torque shearing the ø6 "SPIROL" pin - (light) |
40 ÷ 60 Nm |
Torque shearing the ø6 "SPIROL" pin - (medium) |
90 ÷ 120 Nm |
Torque shearing the ø6 "SPIROL" pin - (heavy) |
140 ÷ 160 Nm |
Coupling sleeve: |
|
Sleeve diameter |
ø 25 mm |
Thread size |
M20 |
Sleeve length |
55 mm |
Bolt capacity required by regulations 120 kN |
120 kN |
Effective bolt capacity 180 kN |
180 kN |
Installation procedure
While inserting the „k” rod the nut does not turn as it is joined with the rod by means of a ø3 or ø6 pin. After the adhesive has set, the pin is sheared by turning the nut.
While applying the „k” rod, the rod should be inserted to the hole with the washer on.
In the case of a two-part anchor, the rod should be connected with the M20 coupling sleeve.
Turn the M20 nut applying torque strength of at least 250 Nm in order to obtain the initial tension of at least 30 kN.
![]() |
![]() |