Best quality Auto Part Springs - China Manufacturer supply TRA-699 leaf spring for trailer – Jiachuang

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  • Best quality Auto Part Springs - China Manufacturer supply TRA-699 leaf spring for trailer – Jiachuang
  • Best quality Auto Part Springs - China Manufacturer supply TRA-699 leaf spring for trailer – Jiachuang

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It adheres on the tenet "Honest, industrious, enterprising, innovative" to acquire new solutions regularly. It regards shoppers, success as its very own success. Let us establish prosperous future hand in hand for Auto Part Springs , U Bolt With Nuts , Angle U Bolt , We welcome shoppers, business enterprise associations and close friends from all sections with the globe to contact us and seek cooperation for mutual added benefits.
Best quality Auto Part 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:

Best quality Auto Part Springs - China Manufacturer supply TRA-699 leaf spring for trailer – Jiachuang detail pictures

Best quality Auto Part Springs - China Manufacturer supply TRA-699 leaf spring for trailer – Jiachuang detail pictures

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We can constantly satisfy our respected customers with our good high quality, good price tag and good support due to we have been additional specialist and extra hard-working and do it in cost-effective way for Best quality Auto Part Springs - China Manufacturer supply TRA-699 leaf spring for trailer – Jiachuang, The product will supply to all over the world, such as: Montreal, India, Albania, We would very much welcome an opportunity to do business with you and have pleasure in attaching further details of our products. Excellent quality, competitive prices,punctual delivery and dependable service can be guaranteed.
    • This supplier stick to the principle of "Quality first, Honesty as base", it is absolutely to be trust.
    5 Stars By Diana from Boston - 2017.09.28 18:29
    This company has a lot of ready-made options to choose and also could custom new program according to our demand, which is very nice to meet our needs.
    5 Stars By trameka milhouse from Cambodia - 2018.10.09 19:07

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