OEM Leaf Springs for USA Trucks and Suspensions

Name: OEM Leaf Springs for USA Trucks and Suspensions
SKU: WD45393619
Availability: InStock

SKU: WD45393619

In Stock

OEM Leaf Springs for USA Trucks and Suspensions

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20+ Years of experiences (since 1999)
Implementing IATF 16949-2016
Implementing ISO 9001-2015
Quality standards: GB/T 19844-2018, GT/T 1222-2007
Flat bar suppliers from top 3 steel mills in China
Leaf length tolerance (mm): ±2 (Exceed spring industry standard ±3)
Camber tolearance (mm): ≤±6 (Exceed spring industry standard ±7)
Fatigue life ( cycles): >120,000+ (Exceed spring industry standard 100,000 cycles)
Annual output (tons): 35,000+
SKUs : 5,000+

Dispatch within Customized Production Based on Your Requirements : Your order will be manufactured according to your specifications (size, material, usage, etc.) with professional engineering support..
Lead Time: 3–60 Days Depending on Quantity and Specification Warranty: Production and delivery time may vary based on your order volume and customization details. Contact us for an accurate schedule.

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Custom OEM Solutions

From standard parts to special requests — we make it to match your trailer.

Global Export Experience

Over 50 countries served with stable quality and reliable logistics.

Trusted for Over 20 Years

A proven name in trailer parts manufacturing and supply.

Description
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Description

Application of leaf springs

What Are Leaf Springs?

Leaf springs stand as the most widely used elastic elements in automobile suspensions today. They consist of several alloy spring sheets with equal width but unequal length, forming an approximate equal-strength steel beam. This design lets them transmit all forces and moments between wheels and frames, ease impact loads from the road, enable vehicle guidance, and keep vehicles running normally. You can find them in suspensions for heavy duty trucks, light duty trucks, pick-ups, cars, and various trailers like skeletal, lowbed, flatbed, and oil tank trailers, as well as agricultural vehicles.

Types of Leaf Springs

WONDEE offers a diverse range of leaf springs to meet different application needs. Here are the main categories:

Conventional leaf springs
Parabolic leaf springs
Z type air linkers
TRA leaf springs
Trailer leaf springs (including light duty trailer springs and boat trailer springs)
Pickup leaf springs
Semi trailer springs
Truck springs (including heavy truck springs)
Farming/agricultural trailer springs
Sprung drawbar
Bus springs
Bogie/boogie springs

Key Quality & Technical Features

WONDEE leaf springs adhere to strict standards and use advanced processes to ensure performance and durability. Below is a detailed breakdown of their key features:

Feature Category	Details
QC Management System	Implements IATF 16949-2016 to maintain consistent quality control.
Services Quality Management System	Follows ISO 9001-2015 to deliver reliable customer service.
Product Technical Standards	Complies with GB/T 19844-2018 and GT/T 1222-2007 for product safety and performance.
Warranty	Provides a 12-month warranty starting from the shipping date.
Quality Testing Equipment	Uses Stiffness Testing Machine, Arc Height Sorting Machine, and Fatigue Testing Machine.
Raw Material	Sources steel from the top 3 steel mills in China for high-quality base material.
Flat Bar Cutting & Center Hole Punching	Relies on fully automatic CNC lines; center hole tolerance <±0.2 mm, cutting length tolerance <±2 mm.
Leaf Spring Eye Rolling	Uses automatic CNC machines with robot assistance; ensures perpendicularity and parallelism tolerance <1% x leaf width, eye diameter tolerance <±0.5 mm.
Leaf Tapering/Parabolic Rolling	Employs automatic CNC parabolic taper rolling machines; taper thickness allowance <±0.25 mm.
Heat Treatment Lines	Uses large-scale CNC heating furnaces (temp difference ±5℃), special quenching equipment, and dedicated tempering lines.
Camber Tolerance	≤±6 mm, which exceeds the spring industry standard of ±7 mm.
Fatigue Life	>120,000 cycles, surpassing the industry standard of 100,000 cycles.
Hardness	Ranges from 41HRC to 48HRC for optimal strength and flexibility.
Shot Peening	Uses a mix of new and used steel shots to boost fatigue life without surface microcracks.
Painting	Offers normal painting and E-coating; E-coating provides >100 hours of salt spray resistance.
Marks/Stickers	Supports custom client logos and designs free of charge.
Other Inspection Equipment	Includes Metallographic Microscope, Spectrophotometer, Carbon Furnace, and Hardness Tester.

Comprehensive Product Specifications

WONDEE leaf springs cover a wide range of parameters to fit various vehicle models and needs:

Specification	Details
Materials Grade	SUP7, SUP9, SUP9A, SUP10, SUP11, SUP11A, SUP12, 60Si2Mn, 55CrMnA, 60CrMnBA, 50CrVA, 60Si2CrA, 61SiCr7, 55Cr3, 60CrB3, 51CrV4, 9260, 5155, 5160, 6150, 51B60, 9254
Spring Width Range	44.5~125 mm
Spring Thickness	6~50 mm
Interchangeable Brands	MERCEDES BENZ, BPW, VOLVO, TOYOTA, HONDA, NISSAN, MAN, HOWO, SCANIA, RENAULT, DAF, ISUZU, IVECO, SISU, HYUNDA, TATRA, MAZ, SAF, ROR, FRUEHAUF, HINO, YORK, FUWA, CIMC
Colors	Red, shinning black, dark black, grey, blue, and other custom colors as required.
Optional Parts	Center bolts, clamps, copper bushes, bi-metal bushes, steel rubber bushings, rubber bushes, nylon bushes, U-bolts, brackets, pins.
Package	Fumigated wooden pallets, steel pallets, or other options as required.
Payment Terms	TT, LC, DP
Lead Time	About 25~35 working days
MOQ	60 pcs
Oversea Sales Volume	14,000+ tons
Overseas Market	30+ countries (Germany, France, Poland, Portugal, Russia, Finland, USA, Canada, Mexico, Thailand, Vietnam, Malaysia, Singapore, The Philippines, Indonesia, Brazil, Bolivia, Argentina, Ecuador, Chile, Peru, Guatemala, Panama, Egypt, South Africa, Nigeria, Tanzania)
Overseas Clients	91+
Land Area	30,000+ square meters
Annual Output	35,000+ tons
Number of Equipments	200+ sets
Number of Employees	260+
Number of Engineers	10+
Available Certificates	COC, PVOC, CIQ, SONCAP, BV, C/O, FORM E, FORM A

OEM Models for USA Trucks & Suspensions

WONDEE provides a wide range of OEM leaf spring models specifically designed for USA trucks and suspensions. These models fit brands like FORD, FREIGHTLINER, FRUEHAUF, HUTCHENS, INTERNATIONAL, MACK, NAVISTAR, REYCO. Below is a selection of key OEM numbers:

S/N	OEM No.	S/N	OEM No.	S/N	OEM No.	S/N	OEM No.
1	46-1189	13	46-176	25	55-1217	37	50-299
2	46-1406	14	46-220	26	55-1219	38	50-183
3	46-1197	15	46-1244	27	55-1238	39	55-1220
4	46-122	16	46-1482	28	55-1242	40	55-144
5	46-1240	17	46-1494	29	55-1262	41	55-1246
6	46-1242	18	50-239	30	55-130	42	62-890
7	46-1246	19	55-021	31	55-148	43	62-968
8	46-1280	20	55-035	32	55-894	44	62-830
9	46-1302	21	55-154	33	55-934	45	62-832
10	46-1432	22	55-029	34	59-428	–	–
11	46-1434	23	55-120	35	55-1219VT	–	–
12	46-1476	24	55-1216	36	50-301	–	–

WONDEE TRA Series Leaf Springs

The TRA series is a key line of leaf springs from WONDEE, including both parabolic and conventional types. Below are detailed specs for selected TRA models:

S/N	OEM Number	Type	No. of Leaf	Weight (kg)	Material Section (mm)
1	TRA2726	Parabolic	3	26.27	20 X 76
2	TRA2727	Parabolic	3	25.83	20 X 76
3	TRA2728	Parabolic	3	25.59	20 X 76
4	TRA3343	Conventional	10	69.02	11 X 100
5	TRA2705	Conventional	7	44.83	13 X 75
6	TRA2260	Conventional	8	48.6	13 X 75
7	TRA2256	Conventional	7	41.21	13 X 75
8	TRA3319	Conventional	9	53.17	13 X 75
9	TRA2297	Conventional	9	51.71	13 X 75
10	TRA2270	Conventional	8	49.82	13 X 75
11	83-115	Conventional	14	54.6	10 X 75
12	TRA2752	Parabolic	2	25.68	24 X 76
13	TRA2754	Parabolic	2	25.35	24 X 76
14	TRA2740	Parabolic	3	31.03	24 X 76
15	TRA2741	Parabolic	3	30.8	24 X 76
16	TRA021	Parabolic	1	18.5	35 X 76
17	TRA023	Parabolic	1	18.58	35 X 76
18	TRA699	Parabolic	4	29.86	20 X 76
19	S1-52	Parabolic	4	34.56	20 X 76
20	TRA693	Parabolic	3	25	20 X 76
21	TRA038	Parabolic	1	22.31	40 X 76
22	TRA035	Parabolic	1	18.04	35 X 76
23	55-896	Conventional	8	68.8	11 X 100
24	TRA3340	Parabolic	3	29.6	20×76
25	TRA2291	Parabolic	3	27.27	20×76
26	55-1192	Parabolic	4	38.68	18,8×100
27	59-400	Parabolic	3	73.26	22×100
28	62-830	Parabolic	4	50.4	8,18×90
29	M/C 3 1/2″x1/2″	Conventional	9	–	13*90-9
30	M/C 4 x 1/2″	Conventional	9	–	13*100-9
31	46-220	Parabolic	3	–	18(8)*100-4
32	46-1280	Parabolic	2	–	20(14)(8)*100-5
33	55-067	Parabolic	1	–	33*90-1
34	ZZ03	Parabolic	–	–	38*90-1
35	55-430	Parabolic	–	–	18(6)*100-5
36	16710-01	Parabolic	2	–	35*76-2
37	TRA2160	Conventional	8	48.3	13 X 75
38	TRA696	Conventional	9	51.03	13X 75
39	55-144	Parabolic	5	48.78	8,10,21×100
40	TRA693	Parabolic	3	26	20×76
41	TRA1492	Parabolic	3	30	20×90
42	TRA3341	Parabolic	3	26.2	20×76
43	62-147	Conventional	10	167	102*20，25
44	TRA073	Parabolic	1	–	–
45	55-930	Parabolic	5	–	–

Notes on TRA Series

WONDEE offers other unlisted TRA leaf springs to cover more specific application needs.
Beyond the TRA series, WONDEE also provides all other leaf spring classifications mentioned earlier, ensuring full compatibility with different vehicle types.

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