Heavy Duty Parabolic Leaf Spring Assembly for Commercial Trucks

Heavy Duty Parabolic Leaf Spring Assembly for Commercial Trucks

Product Overview

Unlike traditional multi-leaf springs, this Parabolic Leaf Spring Assembly features specialized tapered leaves separated by anti-friction silencers. This design minimizes internal friction, allowing individual leaves to flex smoothly without surface wear, significantly dampening severe road impacts in harsh transport environments.

Manufactured from high-grade alloy spring steel, our Parabolic Leaf Spring Assembly is widely used on Russian and Eastern European heavy commercial vehicles, including KAMAZ, MAZ, and Ural trucks. We supply direct-fit aftermarket replacements as well as custom manufacturing built strictly to CAD drawings, physical samples, or specific technical parameters (such as main length L, camber height H, and load capacity Pk).

Applicable Models

Key Features & Product Highlights

• Optimized Parabolic Taper: Progressive leaf thickness design reduces internal stress concentration and extends operational fatigue life.

• OMK Standard Compatibility: Manufactured to strictly match dimension requirements (L1/L2 split length, free arch height H0, total camber H).

• Premium Alloy Spring Steel: Crafted from high-tensile 51CrV4 / 60Si2Mn steel to withstand heavy payloads and extreme cold operating environments.

• Advanced Thermal Treatment: Microstructure optimized through computer-controlled quenching, tempering, and shot peening for maximum elasticity.

• Anti-Corrosion Protection: Finished with electrophoretic coating  or protective black paint to shield against moisture, road salt, and mud.

• Fully Customizable: Custom main lengths, leaf thickness combinations, center bolt positions, and clamp arrangements available.

Technical Specifications

Item	Specification
Product Name	Commercial Heavy Duty Parabolic Leaf Spring Assembly
Primary Keyword	Parabolic Leaf Spring Assembly
Vehicle Application	KAMAZ, MAZ, Ural, Heavy Duty Commercial Trucks & Trailers
Suspension Type	Tapered Parabolic Leaf Spring Assembly (No Eye / Flat End)
Drawing Parameters	Main Length (L1+L2), Free Arch (H0), Total Camber (H), Load (Pk)
Material Grade	High-Strength Alloy Spring Steel (51CrV4 / 60Si2Mn / Equivalent)
Manufacturing Process	Precision Tapering, Blanking & Hole Punching, Heat Treatment, Shot Peening, E-Coating
Surface Protection	Electrophoretic Coating / Anti-Rust Black Paint
Quality Standard	OMK Specification Compatible, ISO/TS Quality Compliant

Vehicle Application & Compatibility

This high-durability Parabolic Leaf Spring Assembly is widely applied across heavy transport platforms, including:

• KAMAZ heavy-duty trucks, dumpers, and tractor units (e.g., KAMAZ 5490, 6520, 65115 series)

• MAZ commercial trucks and heavy logistics transport vehicles

• Ural off-road heavy vehicles and severe duty construction haulers

• European commercial trucks and specialized heavy transport trailers

• Aftermarket replacement for OMK Chusovoy  standard leaf spring assemblies

Before ordering, please provide your drawing dimensions (L1, L2, H, H0), vehicle model, or OEM part numbers to ensure exact fitment.

Technical Inspection & Quality Control

Every Parabolic Leaf Spring Assembly undergoes comprehensive quality checks throughout the production process:

• Dimensional Inspection: Precision verification of main lengths (L1, L2), camber height (H0), and center hole location.

• Load Capacity Testing: Tested on hydraulic press load testers to guarantee exact load-deflection standards under load Pk.

• Metallographic & Hardness Analysis: Metallurgical testing ensures proper heat treatment grain structure and uniform hardness across all leaves.

• Non-Destructive Flaw Detection (NDT): Magnetic particle inspection eliminates internal stress defects and surface micro-cracks.

Manufacturing Process

Our production line operates under strict quality management standards:

1. Raw Material Testing: High-grade alloy spring steel bars undergo chemical composition and tensile testing.

2. Precision Tapering & Punching: CNC hot-rolling taper machinery shapes the parabolic profile, followed by precision hole punching.

3. Thermal Treatment & Shot Peening: Computerized quenching and tempering maximize elasticity, while high-stress shot peening improves fatigue endurance.

4. E-Coating & Assembly: Corrosion-resistant coating applied before assembling leaves with anti-friction silencers, center bolts, and clips.

5. Final QC & Packaging: 100% dimensional, visual, and load test inspection prior to export packing.

Packaging & Export Shipping

To protect your Parabolic Leaf Spring Assembly shipment during ocean freight, we enforce robust export packaging standards:

• Anti-Rust Protection: Treated with anti-rust oil and wrapped in waterproof plastic film.

• Heavy-Duty Palletization: Securely bundled on fumigated wooden pallets or heavy steel pallets with corner protection guards.

• Secure Steel Banding: Bound tightly with high-tensile steel bands to avoid shifting during transit.

• Container Optimization: Tailored container loading plans maximize payload space in 20ft and 40ft containers.

OEM & Custom Manufacturing Services

We are a professional automotive leaf spring manufacturer supplying global distributors, fleet owners, and repair workshops.

We offer full OEM customization options:

• Custom leaf thickness combinations, width, arch height, and layer counts

• Specialized center bolt hardware, mounting clamps, and wear pads

• Private labeling, laser part marking, and custom export packaging

Installation & Maintenance Guidelines

Proper handling and routine care extend the operational lifespan of your Parabolic Leaf Spring Assembly:

• Professional Installation: Have qualified mechanics install the assembly following factory torque settings for mounting U-bolts.

• Torque Retightening: Re-check and tighten U-bolt torque after the first operating period under full payload.

• Visual Inspections: Regularly inspect spring leaves, center bolts, and anti-friction pads for signs of movement or wear.

• Corrosion Protection: Touch up protective paint if operating in highly corrosive, icy, or chemically treated road environments.

Frequently Asked Questions (FAQ)

Q1: Is this parabolic spring compatible with KAMAZ and Russian truck standards?

Yes! It is manufactured according to OMK drawing standards (L1, L2, H0, Pk) and is fully compatible with KAMAZ, MAZ, and other Russian heavy-duty chassis.

Q2: What is the main advantage of a Parabolic Leaf Spring Assembly over traditional multi-leaf springs?

Parabolic leaf springs offer lighter overall weight, better shock absorption, higher ride comfort, and friction-free leaf performance.

Q3: Can you produce custom leaf springs based on technical drawings?

Yes! Send us your technical drawings (including parameters L1, L2, H, H0) or physical samples, and our engineering team will provide custom production options.

Request a Quote

Keep your fleet running smoothly under extreme payload conditions! Contact our sales team today to receive a prompt wholesale quotation for our Parabolic Leaf Spring Assembly!