GEO fastening system
GEO fastening system is used in Hungary mainly in conventional secondary railway lines and in stations, typically in tracks built with rails of type UIC 54 and S49 or 48 kg/m. The GEO fastening system consists of ribbed base plate fixed to the wooden sleeper by sleeper screws, clamp plates which fix the rail to the base plate by bolts with hexagonal nuts where the flexibility of fastened bolts is provided by use of spring washers, which also help to avoid loosening of the nuts on the bolts under heavy vibration from rolling stock. Spring washers are applied also under sleeper screws. In some cases a plastic rail pad goes between the bottom of the rail and the rail base plate, in order to provide improved elasticity of the fastening unit. An advantage of GEO fastening system is its strength of fixing the rail which has a sort of anti-sliding benefit for the rail. GEO fastening components like broken or damaged sleeper screws or bolts are easy to replace.
One complete set of GEO fastenings for each sleeper consists of the following components:
| Name | Amount |
|---|---|
| Plastic pad Zw686a (EVA) | 2 pcs |
| GEO base plate (2 / 4 holes) | 2 pcs |
| Sleeper screw (MÁV-KL / SS35) | 4 pcs |
| Plastic dowel (concrete sleepers) | 4 pcs |
| Clamp plate (Kp3) | 4 pcs |
| Bolts with nuts (M24x72 mm) | 4 pcs |
| Spring washer (double) | 4 pcs |
| Spring washer (triple) | 4 pcs |
