OEM TRA Series Leaf Springs for Light Duty Trailer in North American Market

Description ApplicationsA leaf spring is the most widely used elastic element in automobile suspensions.It is an approximate equal strength steel beam composed of several alloy spring sheets of equal width and unequal length. Its main function is to transmit all forces and moments between wheels and frames, relax impactive load caused by the road surface and realize vehicle guidance, make vehicles normal drive.Leaf springs are widely applied to suspensions for heavy duty trucks, light duty trucks, pick-ups, cars, skeletal trailers, lowbed trailers, flatbed trailers, oil tank trailers, van trailers, wood transport trailers, gooseneck trailers, agricultrucal vehicles, etc. Classification of Leaf Springs include Conventional leaf springs, parabolic leaf springs, Z type air linkers, TRA leaf springs, trailer leaf springs,light duyt trailer spring, boat trailer springs, pickup leaf springs, semi trailer springs, truck springs, farming/agricultural trailer springs, sprung drawbar, bus springs, bogie/boogie springs, heavy truck springs, etc.For more about WONDEE Leaf Springs Project, please click： FeaturesQC management systemImplementing IATF 16949-2016Services quality management systemImplementing ISO 9001-2015Product technical standardsImplementing GB/T 19844-2018, GT/T 1222-2007Warranty12 months since shipping dateQuality testing byStiffness Testing Machine, Arc Height Sorting Machine, and Fatigue Testing Machine, etc.Raw materialTop 3 steel mills in ChinaFlat bar cutting & center hole punchingBy fully automatic CNC cutting & punching production lineCenter hole positioning tolerance: <±0.2 mmCutting length tolerance: <±2 mmLeaf spring eye rollingUse automatic CNC leaf eye rolling machines, robot assistance, dedicated molds   and toolings to guarantee below features:1) Perpendicularity tolerance <1% x leaf width2) Parallelism tolerance< 1% x leaf width3) Eye diameter tolerance<±0.5 mm4) Width tolerance of leaf end: -0.5mm ~ 0 mm   Leaf tapering/parabolic rollingUse automatic CNC parabolic taper rolling machines, robot assistance, dedicated   molds and toolings to guarantee below features:1) Taper thickness allowance: <±0.25mm2) Width tolerance of leaf end: -0.5mm~0 mmHeat treatment lines1) Heating line: The large-scale automatic CNC temperature control heating furnace not only ensures the heating time but also ensures that the temperature in the furnace reaches the   design value (the temperature difference is within ±5 degrees), ensures that the leaf springs are heated evenly, and avoids excessively high or low temperatures, thereby ensuring the strength of the leaf springs and the service life limit meets the Crequirements.2) Quenching & camber making line: Use special CNC quenching equipment, mechanical oil, camber making machines and robot assistance to ensure that the quenching temperature, quenching time and cambers reach the design requirements.3) Tempering line:A dedicated CNC tempering production lines are used to ensure that the tempering temperature and the tempering time meet the design requirements. So as to ensure the strength and service life of leaf springs.Camber tolearance (mm)≤±6 (Exceed spring industry standard ±7)Fatigue life (cycles)>120,000 ( Exceed spring industry standard 100,000 cycles)Hardness41HRC~48HRCShot peeningUsing special leaf spring shot blasting machines, the new and used steel shots are   mixed for use. On the one hand, the new steel shots increase the deformation of the springs. On the other hand, the used steel shots have no edges and corners to avoid microcracks on the surface of the springs, thereby increasing the fatigue life.   PaintingNormal painting and E-coating are available.*E-coating finish line: paint film is uniform and plump, with strong adhesion and high anti-corrosion performance, to avoid dripping, flow marks, stagnation marks and other problems. * Salt spray test >100 hoursMarks/stickers* Clients' logo are supported * Design marks or stickers for clients, free of chargeOther inspection equipment*Metallographic Microscope,*Spectrophotometer*Carbon Furnace*Carbon & Sulfur Combined Analyzer, and *Hardness Tester, etc.Oversea sales volume (tons)14,000 Overseas market30 countries ( German, France, Poland, Portugal, Russia, Filand, USA, Canada, Mexico, Thailand, Vietnam, Malaysia, Singapore, The Philippines, Indonesia, Brazil, Bolivia, Argentina, Ecualor, Chile, Peru, Guatemala, Panama, Egypt, South Africa, Nigeria, Tanzania, etc)Clients (overseas)91 Land area (square meters)30,000 Tons of annual output35,000 Number of equipments (sets)200 Number of employees260 Number of engineers10 Available certificatesCOC, PVOC, CIQ, SONCAP, BV, C/O, FORM E, FORM A.Comprehensive Info of  Leaf Spring:Leaf spring typesConventional leaf springs, parabolic leaf springs, Z type air linkers, TRA leaf springs, trailer leaf springs, boat trailer springs, pickup leaf springs, semi trailer springs, truck springs, farming/agricultural trailer springs, sprung drawbar, bus springs,   bogie/boogie springs, heavy truck springs, light duty trailer springs/small springs, etc.Materials grade:SUP7, SUP9, SUP9A, SUP10, SUP11, SUP11A and SUP1260Si2Mn, 55CrMnA, 60CrMnBA, 50CrVA, 60CrMnBA, 60Si2CrA61SiCr7, 55Cr3, 60CrB3, 51CrV49260, 5155, 5160, 6150, 51B60, 9254Spring width range (mm)44.5~125 mmSpring thickness (mm)6~50 mmInterchangeable brands (make)MERCEDES BENZ, BPW, VOLVO, TOYOTA, HONDA, NISSAN, MAN, HOWO, SCANIA, RENAULT, DAF, MAN, ISUZU, IVECO, SISU, HYUNDA, TATRA, MAZ, SAF, ROR, FRUEHAUF, HINO, YORK, FUWA, CIMC, ETC.ColorsRed, shinning black, dark black, grey, blue, as required.Optional parts, components, & related partsCentor bolts, clamps, Copper bushes, bi-metal bushes, steel rubber bushings, rubber bushes, nylon bushes. U-bolts, brackets, pins.PackageFumigated wooden pallets, steel pallets, as required.Standards implementedIATF 16949-2016, ISO 9001-2015, GB/T 19844-2018, GT/T 1222-2007Payment termsTT, LC, DP.Lead timeAbout 25~35 working days.MOQ60 pcs ParametersWONDEE TRA series leaf springs:S/NOEM NumberTypeNo. of LeafWeightMaterial Section(kg)(mm)1TRA2726Parabolic326.2720   X 762TRA2727Parabolic325.8320   X 763TRA2728Parabolic325.5920   X 764TRA3343Conventional1069.0211   X1005TRA2705Conventional744.8313   X 756TRA2260Conventional848.613   X 757TRA2256Conventional741.2113   X 758TRA3319Conventional953.1713   X 759TRA2297Conventional951.7113   X 7510TRA2270Conventional849.8213   X 751183-115Conventional1454.610   X 7512TRA2752Parabolic225.6824   X 7613TRA2754Parabolic225.3524   X 7614TRA2740Parabolic331.0324   X 7615TRA2741Parabolic330.824   X 7616TRA021Parabolic118.535   X 7617TRA023Parabolic118.5835   X 7618TRA699Parabolic429.8620   X 7619S1-52Parabolic434.5620   X 7620TRA693Parabolic32520   X 7621TRA038Parabolic122.3140   X 7622TRA035Parabolic118.0435   X 762355-896Conventional868.811   X 10024TRA3340Parabolic329.620×7625TRA2291Parabolic327.2720×762655-1192Parabolic438.6818,8×1002759-400Parabolic373.2622×1002862-830Parabolic450.48,18×9029M/C 3   1/2"x1/2"Conventional913*90-930M/C 4 x   1/2"Conventional913*100-93146-220Parabolic318(8)*100-43246-1280Parabolic220(14)(8)*100-53355-067Parabolic133*90-134ZZ03Parabolic38*90-13555-430Parabolic18(6)*100-53616710-01Parabolic235*76-237TRA2160Conventional848.313   X 7538TRA696Conventional951.0313X   753955-144Parabolic548.788,10,21×10040TRA693Parabolic32620×7641TRA1492Parabolic33020×9042TRA3341Parabolic326.220×764362-147Conventional10167102*20，2544TRA073Parabolic14555-930Parabolic5Note 1: Other unlisted TRA leaf springs are available;Note 2: Other classification of leaf spring are available, include: conventional leaf springs, parabolic leaf springs, Z type air linkers, TRA leaf springs, trailer leaf springs, light duyt trailer spring, boat trailer springs, pickup leaf springs, semi trailer springs, truck springs, farming/agricultural trailer springs, sprung drawbar, bus springs, bogie/boogie springs, heavy truck springs, etc. ProductionAbout production processes of leaf springs, please kindly visit YOUTUBE link:Workshops of WONDEE Autoparts leaf springs :(Flat bar workshop, production processing workshop, leaf spring assembly workshop, leaf spring finished production)Processes & equipment of WONDEE Autoparts leaf springs :(1. Flat bar cutting and hole punching→ 2. Spring ends processing→ 3. CNC automatic eye rolling→ 4. Spring heating→ 5. Spring quenching→ 6. Spring tempering→ 7. Spring shot peening→ 8. Leaf spring assembling→ 9. Spring e-painting)QC equipment of WONDEE Autoparts leaf springs :(Material Metallographic analysis, spring spectral analysis, raw material inspection, eyes inspection, spring camber inspection, spring hardness test, salt spray test, fagigue life test, spring rate test)Warehousing & Logistics of WONDEE Autoparts leaf springs: (TRA finished prodution, spring packing, spring warehousing, leaf spring container laoding)Other spring types of WONDEE Autoparts leaf springs: ComponentsComponents & spare parts of WONDEE Autoparts leaf springs (Bi-metal bushings, Composite bushes, Rubber bushes, Center bolts, Spring pins, Leaf spring hangers, Spring brackets, Spring steel flat bars)In addition to supplying leaf springs, WONDEE Autoparts also supply different types of semi trailer components as below: