Railroad spike, also know as rail spike. Railroad spikes are designed to maintain gauge between the running rails and also they are mean to secure the steel rail to the railroad tie. Among the various railroad spikes, dog spikes and the screw spikes are the most common types.
Screw spikes - a kind of railroad spike
Railway screw spikes are usually used to fasten railway ties or sleepers and also they also can be used in conjunction with plastic ferrules, casted into concrete ties /sleepers. Rail screw spikes can be various in thread profiles, lengths, diameters and drive heads based on specific geographic requirements.
Types of Railway Screw Spike
Ss series Sleeper Screw
Ss series sleeper screw is one of our hot sales, with different dimensions as shown below
| Type | Specification | Weight/kg | Surface | Standard |
| Ss 1/130 | M22*130 | 0.451 |
Natural Zinc Paint Oil According to your needs. |
UIC AREMA GB or According to your drawings or samples. |
| Ss 1/150 | M22*150 | 0.478 | ||
| Ss 2/180 | M22*150 | 0.595 | ||
| Ss 5/150 | M24*150 | 0.545 | ||
| Ss 6/150 | M26*150 | 0.702 | ||
| Ss 7/180 | M24*180 | 0.636 | ||
| Ss 8/140 | M24*140 | 0.528 | ||
| Ss 8/150 | M24*150 | 0.548 |
Square head screw spike
|
Type |
Specification |
Material | Surface |
Standard |
| Square head screw spike | M22*145 |
45# 55Q Q235 or According to your needs.
|
Natural Zinc Paint Oil According to your needs. |
UIC AREMA DIN GB or According to your drawings or samples. |
Hexagon screw spike
Hexagon screw spike includes several different sizes such as:M22*145, M22*155, M22*165, M22*185, M22*195, and so on.
| Grade | 4.6 | 5 .6 | 8.8 | 10.9 |
| Material | Q235 | 35# | 45# | 40Cr |
| Mechanical | Tensile strength: ≥ 400Mpa | Tensile strength: ≥ 500Mpa | Tensile strength: ≥ 800Mpa | Tensile strength: ≥ 1000Mpa |
| Yield strength: ≥ 240Mpa | Yield strength: ≥ 300Mpa | Yield strength: ≥ 640Mpa | Yield strength: ≥ 900Mpa | |
| Elongation: ≥ 22% | Elongation: ≥ 20% | Elongation: ≥ 12% | Elongation: ≥ 9% | |
| Cold bending: 90 degree | Cold bending: 90 degree | Cold bending: 90 degree | Cold bending: 90 degree | |
| without crack | without crack | without crack | without crack | |
| Surface | plain (oiled) , Oxide black, Zinc, HDG, wax, bitumen, Dacromet, Sherardizing | |||
Double-head screw spike
The two-end-head screw spike is always used with Nabla clip fastening system, especially popular used in Africa. To meet the strict bending requirement, special raw material is applied by straightening it without any crack after bending 30 degrees or even more.
| Specifications |
| Size: 23×174 |
| Grade: 4.6, 5.6, 8.8, 10.9 |
| Raw Material: 35# |
| Raw material: Q235, 35#, 45# |
| Surface Treatment: Plain (oiled), Bluing, Zinc, HDG, etc |
Comparison of dog spikes and screw spikes
- The screw spikes are the railroad spikes with the screw thread on the surface. But as to the dog spikes, it has a pointed penetrating head with a smooth suface.
- As to the holding power, the screw spikes can provide more than twice of the power than the dog spikes.
- Because of the greater fixing power and the feature that can be combined with spring washers, the cost of manufacture of the screw spike is higher than the dog spikes or dog nails.
