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OEM Leaf Springs for USA Trucks and Suspensions

SKU: WD45393619
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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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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 CategoryDetails
QC Management SystemImplements IATF 16949-2016 to maintain consistent quality control.
Services Quality Management SystemFollows ISO 9001-2015 to deliver reliable customer service.
Product Technical StandardsComplies with GB/T 19844-2018 and GT/T 1222-2007 for product safety and performance.
WarrantyProvides a 12-month warranty starting from the shipping date.
Quality Testing EquipmentUses Stiffness Testing Machine, Arc Height Sorting Machine, and Fatigue Testing Machine.
Raw MaterialSources steel from the top 3 steel mills in China for high-quality base material.
Flat Bar Cutting & Center Hole PunchingRelies on fully automatic CNC lines; center hole tolerance <±0.2 mm, cutting length tolerance <±2 mm.
Leaf Spring Eye RollingUses automatic CNC machines with robot assistance; ensures perpendicularity and parallelism tolerance <1% x leaf width, eye diameter tolerance <±0.5 mm.
Leaf Tapering/Parabolic RollingEmploys automatic CNC parabolic taper rolling machines; taper thickness allowance <±0.25 mm.
Heat Treatment LinesUses 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.
HardnessRanges from 41HRC to 48HRC for optimal strength and flexibility.
Shot PeeningUses a mix of new and used steel shots to boost fatigue life without surface microcracks.
PaintingOffers normal painting and E-coating; E-coating provides >100 hours of salt spray resistance.
Marks/StickersSupports custom client logos and designs free of charge.
Other Inspection EquipmentIncludes 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:

 

SpecificationDetails
Materials GradeSUP7, SUP9, SUP9A, SUP10, SUP11, SUP11A, SUP12, 60Si2Mn, 55CrMnA, 60CrMnBA, 50CrVA, 60Si2CrA, 61SiCr7, 55Cr3, 60CrB3, 51CrV4, 9260, 5155, 5160, 6150, 51B60, 9254
Spring Width Range44.5~125 mm
Spring Thickness6~50 mm
Interchangeable BrandsMERCEDES BENZ, BPW, VOLVO, TOYOTA, HONDA, NISSAN, MAN, HOWO, SCANIA, RENAULT, DAF, ISUZU, IVECO, SISU, HYUNDA, TATRA, MAZ, SAF, ROR, FRUEHAUF, HINO, YORK, FUWA, CIMC
ColorsRed, shinning black, dark black, grey, blue, and other custom colors as required.
Optional PartsCenter bolts, clamps, copper bushes, bi-metal bushes, steel rubber bushings, rubber bushes, nylon bushes, U-bolts, brackets, pins.
PackageFumigated wooden pallets, steel pallets, or other options as required.
Payment TermsTT, LC, DP
Lead TimeAbout 25~35 working days
MOQ60 pcs
Oversea Sales Volume14,000+ tons
Overseas Market30+ 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 Clients91+
Land Area30,000+ square meters
Annual Output35,000+ tons
Number of Equipments200+ sets
Number of Employees260+
Number of Engineers10+
Available CertificatesCOC, 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/NOEM No.S/NOEM No.S/NOEM No.S/NOEM No.
146-11891346-1762555-12173750-299
246-14061446-2202655-12193850-183
346-11971546-12442755-12383955-1220
446-1221646-14822855-12424055-144
546-12401746-14942955-12624155-1246
646-12421850-2393055-1304262-890
746-12461955-0213155-1484362-968
846-12802055-0353255-8944462-830
946-13022155-1543355-9344562-832
1046-14322255-0293459-428––
1146-14342355-1203555-1219VT––
1246-14762455-12163650-301––

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/NOEM NumberTypeNo. of LeafWeight (kg)Material Section (mm)
1TRA2726Parabolic326.2720 X 76
2TRA2727Parabolic325.8320 X 76
3TRA2728Parabolic325.5920 X 76
4TRA3343Conventional1069.0211 X 100
5TRA2705Conventional744.8313 X 75
6TRA2260Conventional848.613 X 75
7TRA2256Conventional741.2113 X 75
8TRA3319Conventional953.1713 X 75
9TRA2297Conventional951.7113 X 75
10TRA2270Conventional849.8213 X 75
1183-115Conventional1454.610 X 75
12TRA2752Parabolic225.6824 X 76
13TRA2754Parabolic225.3524 X 76
14TRA2740Parabolic331.0324 X 76
15TRA2741Parabolic330.824 X 76
16TRA021Parabolic118.535 X 76
17TRA023Parabolic118.5835 X 76
18TRA699Parabolic429.8620 X 76
19S1-52Parabolic434.5620 X 76
20TRA693Parabolic32520 X 76
21TRA038Parabolic122.3140 X 76
22TRA035Parabolic118.0435 X 76
2355-896Conventional868.811 X 100
24TRA3340Parabolic329.620×76
25TRA2291Parabolic327.2720×76
2655-1192Parabolic438.6818,8×100
2759-400Parabolic373.2622×100
2862-830Parabolic450.48,18×90
29M/C 3 1/2″x1/2″Conventional9–13*90-9
30M/C 4 x 1/2″Conventional9–13*100-9
3146-220Parabolic3–18(8)*100-4
3246-1280Parabolic2–20(14)(8)*100-5
3355-067Parabolic1–33*90-1
34ZZ03Parabolic––38*90-1
3555-430Parabolic––18(6)*100-5
3616710-01Parabolic2–35*76-2
37TRA2160Conventional848.313 X 75
38TRA696Conventional951.0313X 75
3955-144Parabolic548.788,10,21×100
40TRA693Parabolic32620×76
41TRA1492Parabolic33020×90
42TRA3341Parabolic326.220×76
4362-147Conventional10167102*20，25
44TRA073Parabolic1––
4555-930Parabolic5––

Notes on TRA Series

  1. WONDEE offers other unlisted TRA leaf springs to cover more specific application needs.
  2. 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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