Leading Manufacturer for BPW Cranked Single trailing Arms - High quality china manufacturer T410012 Trailer leaf spring – Jiachuang

This spring assy are widely used in Thailand for trailer suspension parts .

Spring Measurements Specs

Totally 11 blades ,1-11 blade Width(mm)*Thickness(mm): 100*12, End to End Measurement 1100 mm (Arc Length Measurement),Tolerance range within ±3mm . Camber Height Measurement (see picture) 115mm,Tolerance range within ±5 mm .

All datas are obtained by measuring the new produce product .

Trailer Leaf Spring Process

Multi-leaf springs are made as follows:

1.Shearing of flat bar

2.Center hole punching / Drilling

3.End Heating process

(1).Eye Forming / Wrapper Forming forming (hot & cold process)

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

(3).End punching / end grooving / end bending / end forging / eye grinding

(4).Center hole punching / Drilling / nibbing

4.Heat Treatment

(1).Heating

(2).Camber forming

(3).Quenching

(4).Tempering

5.Surface preparation

(1).Shot peening / stress peening

(2).Painting

6.Eye bush preparation process

(1).Eye reaming / eye boring

(2).Bush insertion

(3).Bush reaming

7.Assemble

(1).Presetting & load testing

(2).Paint touch-up

(3).Marking & packing

Finished Products and Pack Photos

Key Points Keep The High Quality

Production Process

1.Material Cutting

4.Edge Cutting

7.Stress Peening

2.Punching

5.Quenching

8.Assembling

3.Eye Rolling

6.Tempering

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 )