Big discounting Tandem Trailer Leaf Springs - China Manufacturer supply TRA-699 leaf spring for trailer – Jiachuang

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Our well-equipped facilities and great good quality regulate throughout all stages of manufacturing enables us to guarantee total buyer gratification for Rubber Suspension Bushings By Size , U Bolt Drive Shaft , Galvanized U Bolts For Boat Trailers , We are able to do your tailored get to fulfill your own satisfactory! Our organization sets up several departments, including manufacturing department, sales department, high quality control department and sevice center, etc.

Big discounting Tandem Trailer Leaf Springs - 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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abide by the contract", conforms into the market requirement, joins in the market competition by its good quality also as provides a lot more comprehensive and great company for purchasers to let them turn into huge winner. The pursue from the firm, would be the clients' gratification for Big discounting Tandem Trailer Leaf Springs - China Manufacturer supply TRA-699 leaf spring for trailer – Jiachuang, The product will supply to all over the world, such as: Kenya, Bangkok, South Korea, Our solutions are widely recognized and trusted by users and can meet continuously changing of economic and social needs. We welcome new and old customers from all walks of life to contact us for future business relationships and mutual success!

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