Special Price for Leaf Spring Rear Suspension - China Manufacturer supply TRA-699 leaf spring for trailer – Jiachuang

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With advanced technologies and facilities, strict quality control, reasonable price, superior service and close co-operation with customers, we are devoted to providing the best value for our customers for Heavy Duty Truck Leaf Spring , Single Leaf Spring Suspension , Galvanized Trailer U Bolts , You should send us your specifications and requirements, or feel totally free to speak to us with any questions or inquiries that you may have.

Special Price for Leaf Spring Rear Suspension - China Manufacturer supply TRA-699 leaf spring for trailer – Jiachuang Detail:

This spring assy are widely used in American for trailer .

Spring Measurements Specs

Totally 4 blades , End to End Measurement 1110 mm (Free Length Measurement), Free Arch Measurement (see picture) 105mm,Tolerance range within ±3mm . Middle straight 203mm,4pcs middle pads 200*71*1*12.5(mm).

All datas are obtained by measuring the new produce product .

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Semi-Trailer Tra699 Leaf Spring Are Made As Follows

Multi-leaf springs are made as follows:

1. Shearing of flatbar

2. Center holepunching / Drilling

3. End Heatingprocess forming (hot & cold process)

1. Eye Forming /Wrapper Forming

2. Diamond cutting/ end trimming / width cutting / end tapering

3. End punching /end grooving / end bending / end forging / eye grinding / end rolling

4. Center holepunching / Drilling / nibbing

4. Heat Treatment

1. Heating

2. Hardening

3. Cambering

4. Quenching

5. Tempering

5. Surfacepreparation

1. Shot peening /stress peening

2. Primary painting

6. Eye bushpreparation process

1. Eye reaming /eye boring

2. Bush insertion

3. Bush reaming

7. Assemble

1. Presetting &load testing

2. Finish painting

3. Marking &packing

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:

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We insist over the principle of development of 'High top quality, Performance, Sincerity and Down-to-earth working approach' to supply you with exceptional services of processing for Special Price for Leaf Spring Rear Suspension - China Manufacturer supply TRA-699 leaf spring for trailer – Jiachuang, The product will supply to all over the world, such as: San Diego, Pretoria, panama, We will not only continuously introduce technical guidance of experts from both home and abroad, but also develop the new and advanced products constantly to satisfactorily meet the needs of our clients all over the world.

D-MAX leaf spring