The difference between split fasteners and non-split fasteners

"Fastener system" or "fastener" consists of all parts that connect rails to sleepers.

According to the connection method between the rail foundation and the rail, it is divided into two types: split fasteners and non-split fasteners.

1.1 Non-split fasteners (direct fasteners) directly fix the rails to the sleepers. If it is necessary to set a pad, the same fastener is used to fix the rails and the pads to the sleepers at the same time. Direct fasteners also include fasteners in ballastless track structures.

1.2 Split fasteners (non-direct fasteners) use one fastener to fix the rails to the intermediate components, such as iron pads, and another fastener to fix the intermediate components to the sleepers. The advantage of non-direct fasteners is that there is no need to loosen the fasteners on the sleepers when moving the rails. In addition, the intermediate components can be placed on the sleepers in advance.

2.1 Spring Clip Type IV Fastener

Spring Clip Type IV fastener uses spring clips to fix the rails on the sleepers, so this fastener belongs to the non-separable fastener. Spring Clip Type IV Fastener (Non-separable Fastener)

2.2 Spring Clip Type I Fastener

Spring Clip Type I fastener uses spring clips to fix the rails on the sleepers, so this fastener also belongs to the non-separable fastener. Spring Clip Type I Fastener (Non-separable Fastener)

2.3 WJ-7 Fastener

WJ-7 fastener uses T-bolts and spring clips to fix the rails on the iron pads, and uses anchor bolts to fix the pads on the sleepers. So this fastener belongs to the separate fastener.

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