Swellex (Python Bolts)

Swellex (Python bolts) are water expandable rock bolt range which act as friction bolts with superior product characteristics to meet the most demanding roof support applications. The high load-bearing capacity combined with excellent elongation properties ensure safer working conditions and faster excavation cycles for low costs. Python® System binds effectively through fractures and fissures with its high load capacity. Elongation properties allow substantial movements of the rock without breaking of the bolt.

Panchvaktram Engineering offers “Jennmar make” Swellex bolts in 120kN, 160kN, 200kN and 240kN loads along with accessories. The bolts are available in 2m, 3m, 4m, 5m, 6m lengths.


Technical Details

LengthTill 8000mm 8000mm 8000mm
Thickness 2 mm 2 mm 2 mm
Bolt Diameter 26 mm 36 mm 36 mm
Original Tube 41 mm 54 mm 54 mm
Optimum Borehole 35-38 mm 45-51 mm 45-51 mm
Tensile Strength 120 kN 160 kN 240 kN
Minimum Elongation 20% 20% 20%
Typical Elongation 30% 30% 30%
Plate 150*150*6 200*200*6 200*200*8
Plate Hole 30 mm 40 mm 40 mm
Weight 2kg/m 2.8kg/m 3.8kg/m



Technical Details

Jennmar offers a wide range of pumps for the injection of Python bolts to the different needs and requirements of our customers, able to inflate the bolts at pressures above 300 bar (inflation pressure required).