Type WJ-7 Rail Fastening System
Type WJ-7 rail fastening system
The type WJ-7 rail fastening system, also known as the WJ-7 elastic fastener. It is mainly used for various shoulderless ballastless tracks of high-speed railways, as well as bridge sections and other settlement-prone sections. It is designed for passenger dedicated lines operating at 250 to 350 km/h. It consists of T-bolts, nuts, plain washers, elastic clips, insulation blocks, base plates, rail pads, insulating buffer pads, heavy spring washers, spacer blocks, anchor bolts and embedded sleeves. Additional rail height and base plate adjusting pads are provided for rail height adjustment.
We are one of the major suppliers of railway track fasteners to China State Railway Group. With 10 years of experience manufacturing railway products, our factory covers an area of 80 acres. Equipped with advanced production facilities and backed by proven technologies, we achieve an annual output of 20 million units. We supply a full range of fasteners for all types of railway fastening systems. Please feel free to contact us for inquiries.
Type WJ-7 rail fastening system components
Type WJ-7 rail fastening system components specification
No. | Name | Quantity | Material | Mass/Volume | Remarks |
1 | T-bolt T1 | 2 | Q235-A | 0.76kg | |
2 | Nut M24 | 2 | Q235-A | 0.224kg | |
3 | Flat Washer | 2 | Q235-A | 0.138kg | |
4 | Type W1 Spring Clip | 2 | 60Si2MnA | 1.44kg | Select one according to specific requirements of line resistance. |
Type X2 Spring Clip | 1.22kg | ||||
5 | WJ7 Insulation Block | 2 | Glass Fiber Reinforced Nylon 66 | 72.6cm³ | |
6 | WJ7 Tie Plate | 1 | QT450-10 | 10.2kg | |
7 | WJ7 Insulation Buffer Pad | 1 | Rubber-Plastic | 420cm³ | |
8 | WJ7-A Rubber Pad | 1 | Rubber | 270cm³ | For mixed passenger and freight lines. Select one according to specific requirements of line resistance. |
WJ7-A Composite Pad | Rubber + Stainless Steel | 270cm³ / 0.24kg | |||
WJ7-B Rubber Pad | Rubber | 325cm³ | For 350km/h passenger dedicated lines. Select one according to specific requirements of line resistance. | ||
WJ7-B Composite Pad | Rubber + Stainless Steel | 325cm³ / 0.24kg | |||
9 | Circular Stud Bolt B1 | 2 | Q235-A | 2.20kg | |
10 | Heavy Spring Washer 30 | 2 | 65Mn or 60Si2Mn | 0.09kg | |
11 | WJ7 Flat Pad | 2 | QT450-10 | 0.50kg | |
12 | Embedded Sleeve D2 | 2 | Glass Fiber Reinforced Nylon 66 | 200cm³ | |
13 | WJ7 Under-Rail Shim Pad | Polyethylene | 27.7cm³/pc | Selected according to specific conditions of height adjustment. | |
14 | WJ7 Under-Tie Plate Shim Pad | Rubber-Plastic | 310cm³/5pcs | Selected according to specific conditions of height adjustment. |
* The height h from the rail top surface to the bearing surface of the concrete sleeper or track slab is shown in the table below. If the filled-type pad is selected, the height shall be increased by 4 mm respectively.
| Under-rail Pad Type | WJ7-A Rubber Pad | WJ7-A Composite Pad | WJ7-B Rubber Pad | WJ7-B Composite Pad |
|---|---|---|---|---|
h (mm) | 211 | 212.2 | 213 | 214.2 |
Type WJ-7 rail fastening system components drawings
1. W1 rail clip, X2 tension clamp
2. WJ7-A rubber rail pad, WJ7-B rubber rail pad
Type WJ-7 rail fastening system advantages
The Type WJ-7 rail fastening system that we offer has many advantages as follows:
1. Excellent versatility and interchangeability
This system offers excellent versatility and interchangeability. Its flexible structure adapts to a wide range of operating conditions. You can combine different elastic clips (Type W1, X2) with rail pads (rubber or composite) to freely adjust the longitudinal resistance of rails, fully meeting the requirements of diverse track lines.
2.Superior track adjustment performance
Track Gauge Adjustment: Elongated holes on the base plate allow continuous stepless adjustment from -12 mm to +12 mm. Vertical Adjustment: Shim pads of different thickness under the rail and base plate offer an adjustment range of -4 mm to +26 mm, making track maintenance easier.
3.Excellent insulation and vibration damping performance
An insulating block is fitted between the rail and elastic clips, while insulated buffer pads are installed between base plates and sleepers. This dual insulation design greatly boosts the system’s insulation capability and ensures stable operation of track circuits. Meanwhile, the rubber pads absorb impact from trains and reduce vibration effectively.
4. Reliable component fastening
The base plate is tightly fixed with T-bolts, and the connection of anchor bolts and embedded sleeves ensures lasting reliability between the fastening system and the foundation.
We are a reliable and professional railway fastener supplier
Certifications
We are an experienced and reliable manufacturer of railway products, we emphasize quality control, and we have our own professional inspection center and a comprehensive quality management system. Also, our products have passed the ISO9001 quality management system, ISO14001 environmental management system and ISO45001 occupational health and safety management system triple certification, and we have also passed the product certification of China CRCC. We are indeed a trustworthy railway product supplier, Please contact us anytime if you have any needs.
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