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Product Introduction
Key Structural Features of the Type II Railway Fastening System:
Double-Layer Vibration Damping: Rubber padding plates are installed both between the rail and steel base plate, and between the base plate and foundation.
Versatile Clamping Components: Type II elastic clips serve as the primary fasteners, with compatibility for installing Type I fastener Type B elastic clips.
T-Bolt Fastening Mechanism: The steel base plate features a T-bolt insertion seat. Tightening the T-bolt nut secures the elastic clip in place.
Gauge Adjustment: A gauge block is positioned between the T-bolt seat and the rail, allowing track gauge adjustment within a range of -8 to +4 mm.
Base Plate Fixation: The steel base plate has bolt holes that align with insulated sleeves embedded in the concrete foundation. Anchor bolts, paired with spring washers between the bolt and base plate, ensure secure fastening.
Vertical Rail Adjustment: Height adjustment is achieved via shim plates:
10 mm adjustment under the rail
10 mm adjustment under the steel base plate
Total vertical adjustment: 20 mm
Type II Railway Fastener System Components
| Type-II Rail Fastening System Coponents List | |||||
| Type | Product | Specification | Standard/Drawing | Unit | Q'ty |
| Type-II Rail Fastening System | screw spike | 24*195 | TB/T564 | Pcs | 2 |
| nut | M24 | GB41 | Pcs | 2 | |
| rail clip | II-type | TB/T3065.2 | Pcs | 2 | |
| gauge baffle plates | 6# | TB/T1495.3 | Pcs | 1 | |
| gauge baffle plates | 10# | TB/T1495.3 | Pcs | 1 | |
| flat washer | 25*50*6 | TB/T1495.4 | Pcs | 2 | |
| rubber pad | IIIa | TB/T2626 | Pcs | 1 | |
| nylon baffle seat | 2-4# | TB/T1495.5 | Pcs | 2 | |
Type II clip performance
| Item | Specification Range |
|---|---|
| Material Grade | 60Si2Mn, 55CrSi, or equivalent spring steel |
| Tensile Strength | ≥ 1500 MPa |
| Yield Strength | ≥ 1300 MPa |
| Elastic Deflection | 9–12 mm (without permanent deformation) |
| Toe Load (Clamping Force) | 8–14 kN, configurable by design |
| Fatigue Life | ≥ 5 million cycles under specified load |
| Heat Treatment | Quenched and tempered |
| Surface Treatment | Plain oil, black oxide, HDG, or Dacromet |
Type II fastenering system Application
Railway Line Types
General Speed Trunk Railways: Suitable for trunk railways with design speeds ≤160 km/h , meeting track stability requirements for medium traffic volume and conventional speeds.
Intercity Railways: Used in intercity commuter lines (e.g., Pearl River Delta Intercity, Yangtze River Delta Intercity) to connect rails with concrete sleepers, adapting to frequent starts/stops and medium loads.
Freight-Dedicated Lines: Applied in some medium-volume freight lines (e.g., local freight railways), leveraging their structural strength to resist longitudinal impact forces from freight trains.
Sleeper Matching Types
Concrete Sleepers with Shoulders: Used in conjunction with shouldered concrete sleepers (e.g., Type Ⅱ, Type Ⅲ sleepers). Track gauge is adjusted through the cooperation of gauge retainers and shoulders to enhance lateral stability.
Frequently Asked Questions about Railway Fastening Systems
FAQ
Components such as elastic clips and retainers are produced per design specifications. Elastic clips undergo forging and heat treatment, while insulating blocks are injection-molded. After anti-corrosion treatment, components are assembled, tested for clamping force and other properties, and approved for delivery upon passing inspections.
01
Clean the sleeper groove, anchor the spikes with sulfur, place the rubber padding plate, install the retainer and insulating block, fasten the elastic clip, add the washer and tighten the nut, then inspect the clamping force, track gauge, etc.
02
How are fastening systems packaged?
When packaging railway fastening systems, all components are first cleaned and protected against rust, then classified by specifications and placed into moisture-proof boxes. Accessories are separated by buffer materials, and the boxes are labeled with information such as model and quantity to ensure no damage during transportation.
03
Type II elastic clips have higher strength and greater clamping force than Type I, making them suitable for heavy-haul railways. Type I uses spring washers, while Type II employs nylon retainer seats, offering better insulation performance and a more optimized structure.
04
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