Coil spring
This type of spring has the most usage in most of light passenger cars .the form of this spring is in the form of coil wire that will be rolled to the axis of spring. This spring also for variability of main diameter or changing of wire diameter is different. This spring in bigger scale is used in trains especially in Passenger trains.

Torsion Bar

This kind of spring is designed by using of curling feature of steel which normally consists of a spiral bar made of special steel. by using of a lever which will be installed in the outset it can change vertical motion of the wheels to torsion bar spiral motion.
This spring has a lot of usage in light weight and some commercial vehicles

Stabilizer

Stabilizer in automotive suspension system has the responsibility of balancing between front wheels and back wheels, and it keeps the balance of passenger cars in motion and especially in turns. This piece is inseparable part of light and heavy vehicles that can be designed and made in different forms and mechanisms.

Leaf spring

Leaf spring normally is used in commercial vehicles and trains. This spring consists of steel layers which each layer has specific thickness. These layers with specified length from basic length to lower length will be set in a way that gives the Best spring feature to the spring.

Parabolic spring

This kind of spring is similar to leaf spring. The difference is that each layer variable thickness like Parabolic in order to give spring feature to the spring. By comparison this spring on the contrary of leaf spring and by eliminating of friction among layers can be able to decrease 40% of the weight, whereas it has better feature than leaf spring.

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Rail clips
Segmentation same as 8 shape that is connect rail to land for controlling shake of train

U-bolt
General manufacturing of U-bolt is for end of spring and machine, that is usually connect leaf spring with 2 u-bolt to machine pivot.