fastenings
DESCRIPTION
The materials used to connect a rail to a sleeper in the form ofK-type fastening include Steel baseplate, screws, spring clips,spring clip bolts, double layer washers and intermediatebaseplate, and of HM-type fastening include spikes, angle guide,plastic baseplate, screws and feeding washers.TRANSCRIPT
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THE FASTENINGS
SKL–14 TYPE FASTENINGS
THE FASTENINGS
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SKL-12 TYPE FASTENINGS
K TYPE FASTENINGS
THE FASTENINGS GENERAL DESCRIPTION
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• General description
• The materials used to connect a rail to a sleeper in the form of
K-type fastening include Steel baseplate, screws, spring clips,
spring clip bolts, double layer washers and intermediate
baseplate, and of HM-type fastening include spikes, angle guide,
plastic baseplate, screws and feeding washers.
• Rail baseplates are placed between the foot of rail and the
sleeper. Baseplates are elements that transfer loads transversely
from the rail over a larger surface and provide the elasticity for
attenuation of vibrations.
THE FASTENINGS K TYPE FASTENINGS
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• K-type fastening system
• This fastening system is used in straight lines, switches and crossings.
THE FASTENINGS K TYPE FASTENINGS
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• K-type fastening for concrete sleepers
• There is only one screw on each side of the rail. A 6-7 mm thick baseplate pad is required, and a 2-3 mm thick rail pad.
• K-type fastening for wooden sleepers
• There are two screws on each side of the rail. In addition, a 3-4 mm thick rail pad is needed.
• The tightening torque value:
• The tightening torque for the spring clip bolts is 180-200 Nm.
• The tightening torque for the screws is 250 Nm.
THE FASTENINGS K TYPE FASTENINGS
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THE FASTENINGS SKL-14 FASTENING SYSTEM
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• SKL-14 Fastening system
• SKL 14 fastening system is used for concrete sleepers. A screw on each side of the rail is used to attach spring clips and angle guide for positioning the rail, and an under-rail plastic baseplate is placed between the rail and the sleeper.
• The position of the rail is secured with angle guide plates. The lateral forces from the rail are transferred to the concrete sleeper through the angle guide without causing twisting of screws or some stress leading to cross slip or any deformation which would be a disadvantage for the track gauge.
• The gauge can be adjusted up to (+10, -10) mm by means of angles guides with various widths.
THE FASTENINGS SKL-14 FASTENING SYSTEM
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THE FASTENINGS SKL-14 FASTENING SYSTEM
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THE FASTENINGS SKL-14 FASTENING SYSTEM
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Tightening torque value and fixing gap
• The tightening torque for the screws is 250 Nm.
• The gap between the bottom of the spike and angle guide
should be 0.5 mm during tightening. Measure the gap with a
feeler gauge.
• The central curve of the spike prevents rise and overturn of the
rail. There should be approximately 1.5 mm free space
between the central curve of the spike and the rail foot.
THE FASTENINGS SKL-12 FASTENING SYSTEM
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• SKL-12 baseplate and fastening system for Switches and Crossings (S&C)
• SKL-12 fastening system is used for switches with steel baseplates and extension joints. Two screws on each side of the rail are used to attach the baseplate to the sleeper. A 3 - 4 mm thick baseplate pad is required between the steel baseplate and the sleeper.
THE FASTENINGS SKL-12 FASTENING SYSTEM
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• The tightening torque value and fixing gap:
• A 6 mm rail pad is placed between the rail and baseplate. Rail pad elasticity should be above 200 kN/mm.
• The tightening torque for the spring clip bolts is 180-200 Nm.
• The tightening torque for the sleeper screws is 250 Nm.
• The free space between the central curve of the spring clip and the rail should not exceed 2mm (see Figure below) Measure the gap with a 2-mm feeler gauge.
THE FASTENINGS
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