Professional China Heavy Duty Truck Leaf Spring - High quality china manufacturer SUP9 steel leaf spring for trailer – Jiachuang

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Our firm sticks to the basic principle of "Quality is the life of your company, and status will be the soul of it" for Copper U Bolt , Horse Trailer Leaf Springs , Drive Shaft U Bolts , With the eternal goal of "continuous quality improvement, customer satisfaction", we are sure that our product quality is stable and reliable and our products are best-selling at home and abroad.
Professional China Heavy Duty Truck Leaf Spring - High quality china manufacturer SUP9 steel leaf spring for trailer – Jiachuang Detail:

This spring assy are widely used in American for trailer .

Spring Measurements Specs

Totally 3 blades , 3pcs middle pads , End to End Measurement 1133 mm (Free Length Measurement), A side Free Arch Measurement 124mm,Tolerance range +6mm ,B side Free Arch Measurement 105mm,Tolerance range +6mm, Middle straight 203mm .

All datas are obtained by measuring the new produce product .

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Parabolic Semi-trailer TRA2727 Leaf Spring Characteristics

1. The TRA2727 LEAF SPRING acts as a linkage for holding the axle in position and thus separate linkages are not necessary. It makes the construction of the suspension simple and strong.

2. Because the positioning of the axle is carried out by the leaf springs, it is disadvantageous to use soft springs i.e. springs with low spring constant.

3. Therefore, this type of suspension does not provide good riding comfort. The inter-leaf friction between the leaf springs affects the riding comfort.

4. Acceleration and braking torque cause wind-up and vibration. Also wind-up causes rear-end squat and nose-diving.

5. The inter-leaf friction damps the spring’s motion and reduces rebound, which until shock absorbers were widely adopted was a great advantage over helical springs.

TRA2727 Leaf Spring Detail Photos

Key Points Keep The High Quality

1) Raw matrail .
Thickness less than 20mm. we choose SUP9/55Cr3/SAE5160H as the product material
Thickness from 20-30mm. wE choose SUP11A/50CrVA
Thickness more than 30mm. We choose 51CrV4 as the raw material
Thickness more than 50mm. We choose 52CrMoV4 as the raw material
2) Quchenging Process
We strickly controled the steel temeprure around 800 degree.
we swing the spring in the qenching oil among 10 seconds according to the spring thickness.
3)Shot Peening.
Each assmembing spring set under stress peening .
Fatigue test can reach over 150000 cycus
4) Painting
Each leaf under cataphoresis painting.
Salt spray testing reach 500hours

Production Process

material-cutting

1.Material Cutting

Edge-Cutting

4.Edge Cutting

Stress-Peening

7.Stress Peening

Punching

2.Punching

Quenching

5.Quenching

Assembling

8.Assembling

Eye-Rolling

3.Eye Rolling

Tempering

6.Tempering

Painting

9.Painting

FAQ

Q1: What type of leaf spring could you produce ?

A: We can produce most kinds of springs in the market. especially on the parabolic springs.

Q2: What material could you supply for leaf spring?

A: Our material grade should be SUP9/SUP9A /SUP11A/51CrV4 /52CrMoV4/ even 55Cr3 and  SAE5160H as well .

Q3: How long will be your delivery time?

A: 20-40days. If material stock enough around 20days. if not,would be 40days

Q4: What payment terms are acceptable?

A: TT and LC at sight

Q5: What is the packing?

A: No fumigation wooden pallet . we also can pack according to whatever you request if reasonable.

Q6:How about the surface finishing ?

A : electrophoresis coating (black,red,gray,or as customer’s requests )


Product detail pictures:

Professional China Heavy Duty Truck Leaf Spring - High quality china manufacturer SUP9 steel leaf spring for trailer – Jiachuang detail pictures

Professional China Heavy Duty Truck Leaf Spring - High quality china manufacturer SUP9 steel leaf spring for trailer – Jiachuang detail pictures


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With this motto in mind, we've come to be one of quite possibly the most technologically innovative, cost-efficient, and price-competitive manufacturers for Professional China Heavy Duty Truck Leaf Spring - High quality china manufacturer SUP9 steel leaf spring for trailer – Jiachuang, The product will supply to all over the world, such as: Uruguay, Vietnam, Venezuela, By adhering to the principle of "human oriented, winning by quality", our company sincerely welcomes merchants from at home and abroad to visit us, talk business with us and jointly create a brilliant future.
  • This supplier's raw material quality is stable and reliable, has always been in accordance with the requirements of our company to provide the goods that quality meet our requirements.
    5 Stars By lucia from Czech republic - 2017.05.21 12:31
    The sales manager is very patient, we communicated about three days before we decided to cooperate, finally, we are very satisfied with this cooperation!
    5 Stars By Hilary from Mongolia - 2017.09.28 18:29