China Leaf Spring for Mack Manufacturers Suppliers - Good Price Leaf Spring for Mack

Your Professional Leaf Spring For Mack Supplier

Founded in 2011 in Zhengzhou, Henan, our factory specializes in the manufacturing of automotive leaf springs for both aftermarket and OEM customers. We operate three dedicated production lines equipped with environmental protection systems, ensuring stable and compliant production under strict regulatory requirements. Our team consists of more than 150 skilled frontline workers, supported by 15 engineers and technicians and 30 professional office staff. With a well-managed manufacturing facility, standardized processes, and reliable inspection equipment, we focus on consistent quality, traceable production, and long-term cooperation. Our capabilities and disciplined operations enable us to serve international customers with confidence and reliability.

High-quality Leaf Spring Oem 62-988 For MackTruck
1. Painted black by electrophoresis 2. OEM:62-988 for Mack truck 3. At the front location 4. The optional material:Sup9,50CrVA,51CrV4,52CrMoV4
Parabolic Leaf Spring Oem 62-976, 2QK3444M, 2QK3444AM For MackTruck
1. Painted black by electrophoresis 2. OEM:62-976,2QK3444M, 2QK3444AM for Mack truck 3. At the front location 4. The optional material:Sup9,50CrVA,51CrV4,52CrMoV4
Parabolic Leaf Spring Oem 62-1044,2QK4100,2QK498 For MackTruck
1. Painted black by electrophoresis 2. OEM:62-1044,2QK4100,2QK498 for Mack truck, with rubber bushing 3. At the front location 4. The optional material:Sup9,50CrVA,51CrV4,52CrMoV4
High-quality Leaf Spring Oem 62-1092, For Mack Truck
1. Assembling painted black by electrophoresis 2. OEM:62-1092,for Mack truck3.Medium and heavy-duty leaf spring with 2 threaded bushings:TB-785. Material:Sup9,50CrVA,51CrV4,52CrMoV4
High-quality Leaf Spring Oem 62-1094, 2QK4146 2QK4146AM For American Truck: Mack
1. Assembling painted black by electrophoresis 2. OEM:62-1094, 2QK4146 2QK4146AM for Mack truck3.Medium and heavy-duty leaf spring with 2 threaded bushings:TB-785. Material:Sup9,50CrVA,51CrV4,52CrMoV4
High-quality Leaf Spring Oem 62-147, 4QK4005A For Mack Truck
1. Assembling painted black by electrophoresis 2. OEM:62-147,4QK4005A for Mack truck3. Medium and heavy-duty leaf spring with camelback camber4. Material:Sup9,50CrVA,51CrV4,52CrMoV4
OEM:62-830 2QK3378P2 Front Taper Leaf Spring with 3 Leaves for American Medium and Heav...
1. With eccentric hole, so the left length unequal to the right. 2. Assy painted black directly by electrophoresis process. 3. Leaf spring painting thickness greater than 30μm . 4. Against rust and
OEM:62-968 2QK3435M 25175026 Parabolic Leaf Spring with 3 Leaves for Mack Trucks
1. With eccentric hole, so the left length unequal to the right. 2. Included 2 Rubber Bushings, one of two with pin. 3. Assy painted black directly by electrophoresis process. 4. Leaf spring
OEM:62-832 2QK3378P3 Front Taper Leaf Spring with 3 Leaves for Mack Medium and Heavy Tr...
1. With eccentric hole, so the left length unequal to the right. 2. Assy painted black directly by electrophoresis process. 3. Leaf spring painting thickness greater than 30μm . 4. Against rust and

Why Choose Us

OEM & ODM Customization

Based on customer drawings or technical data, our engineers provide optimized designs aligned with application requirements and practical manufacturing conditions.

Production Market

Our products are distributed through authorized dealers across China and exported to North America, Latin America, the Middle East, and Southeast Asia.

Product Application

Our leaf springs are used in light, medium, and heavy trucks, buses, trailers, and construction vehicles.

Standard Quality & Warranty Support

Standard production control ensures stable quality, with a 6-month warranty from the start of use.

Leaf Spring for Mack

A Mack truck leaf spring is a critical component in the suspension system of heavy-duty commercial vehicles. Constructed from high-strength steel, these springs consist of multiple curved steel plates—called leaves—stacked together to support the vehicle’s weight, absorb road shocks, and maintain stability under heavy loads. Designed for durability and performance, Mack leaf springs are engineered to handle extreme conditions across various industries such as construction, freight transport, and logistics.

Specification	Details
Spring Size	Length: 60 to 80 inches; Width: 3 to 5 inches. Larger dimensions provide enhanced stability and load support.
Spring Thickness	0.25 to 0.5 inches. Thicker springs are stiffer and better suited for heavier loads.
Material	High-carbon steel or spring steel, ensuring durability and excellent load-bearing capacity.
Load Capacity	5,000 to 20,000 pounds, depending on size and thickness.
Spring Rate	500 to 1500 PLI (pounds per inch). A higher rate indicates increased stiffness, affecting ride comfort and handling.

Features of Leaf Spring for Mack

Shock Absorption and Damping

When the wheels are subjected to impact, the leaf springs absorb energy through elastic deformation, reducing body vibration and maintaining driving stability. For example, when a Mack truck is driving fully loaded on rough roads, the leaf springs effectively filter out bumps, protecting the cargo and the vehicle structure.

Load Bearing and Force Transmission

The leaf springs transmit the load from the wheels to the entire suspension system, and distribute stress through the relative sliding of each leaf spring, preventing localized overloading. Under heavy loads, the stacked structure of multiple leaf springs provides stronger support.

Guiding Function

The leaf springs control the trajectory of the wheels relative to the vehicle body, ensuring stability during cornering or braking. For example, when a Mack truck makes a sharp turn at high speed, the leaf springs limit wheel tilt, preventing rollovers.

OEM:62-830 2QK3378P2 Front Taper Leaf Spring With 3 Leaves For American Medium And Heavy Trucks suppliers

Type of Leaf Spring for Mack

Multi-Leaf Springs

Composed of several layers of steel leaves stacked together, multi-leaf springs offer maximum load-bearing capacity and structural resilience.

Mono-Leaf Springs

Constructed from a single thick, arched steel plate, mono-leaf springs provide a simplified, lightweight suspension solution.

Variable-Rate Leaf Springs

Engineered with leaves of varying thickness or length, these springs change stiffness progressively as they compress.

High-quality Leaf Spring Oem 62-147, 4QK4005A For Mack Truck manufacturers

Tapered-Leaf Springs

Features leaves that narrow at the ends (tapered), reducing internal friction and enhancing flexibility and longevity.

Applications Of Leaf Spring For Mack

Highway hauling

Prioritize smooth ride characteristics and fatigue resistance over extreme lift or articulation.

Off-road/construction

Opt for reinforced multi-leaf packs with higher arch and rugged bushings to handle uneven terrain and shock loads.

Urban delivery

Frequent stops and starts demand durable springs with consistent rebound control.

How to Choose Leaf Spring for Mack

OEM:62-830 2QK3378P2 Front Taper Leaf Spring With 3 Leaves For American Medium And Heavy Trucks

Load Capacity: The primary function of a leaf spring is to support the weight of the vehicle and its cargo. It's critical to match the spring’s load rating with the typical and maximum payloads your truck will carry.

Size and Fitment: Not all leaf springs are interchangeable—even among Mack models. Proper fitment ensures correct mounting, alignment, and suspension geometry.

Material & Construction Quality: Leaf springs are typically made from high-tensile steel, but material grade and heat treatment significantly affect durability and performance.

Driving Conditions & Application: The operating environment heavily influences the ideal spring design. Mack trucks serve diverse roles—from long-haul freight to off-road construction.

Spring Rate & Ride Comfort: The spring rate (measured in lbs/inch) determines how much force is needed to compress the spring. This directly affects both load support and driver comfort.

Lift Height & Ground Clearance: Some Mack trucks are modified for specialized uses that require increased ground clearance. Lifted leaf springs raise the chassis accordingly.

Basic Structure of Leaf Spring for Mack

Composition Materials

Composed of multiple superimposed alloy spring steel plates. The steel plates have the same width but varying lengths, and are fixed together by a central bolt or U-bolt, forming an elastic beam with approximately equal strength.

Key Components

Main Leaf Eye: The ends of the main leaf are rolled into circular holes, connecting to the vehicle frame or swing hanger via pins.

Wrap-Around Eye Design: The end of the second leaf is bent into a wrap-around eye, enclosing the outer side of the main leaf eye, enhancing strength and reducing wear.

Gap Design: A gap is left between the main leaf eye and the second leaf's wrap-around eye, allowing the plates to slide relative to each other during elastic deformation, reducing friction.

Maintenance

High-quality Leaf Spring Oem 62-1092, For Mack Truck

Regular Inspection: Visually examine leaf springs frequently for signs of cracking, broken leaves, corrosion, or misalignment. Pay special attention after off-road driving or heavy loading. Check for loose U-bolts, damaged bushings, and abnormal wear patterns.

Lubrication: Apply manufacturer-recommended grease to bushings and pivot points during routine servicing. Proper lubrication reduces friction between moving parts, prevents squeaking, and minimizes premature wear. Avoid over-greasing, which can damage rubber components.

Eye and Shackle Maintenance: Inspect the spring eyes and shackle assemblies regularly. Worn or elongated eyes can cause clunking noises, poor alignment, and reduced suspension efficiency. Replace any cracked or excessively worn hardware immediately.

Alignment and Mounting Checks: Ensure the leaf springs are properly seated and aligned with the axle and frame. Misalignment can lead to uneven tire wear, steering instability, and accelerated component failure. Torque U-bolts to factory specifications during installation or reassembly.

Timely Replacement: If a leaf spring shows irreversible damage—such as a broken leaf, severe corrosion, or permanent set (loss of arch)—replace it promptly using OEM or approved aftermarket equivalents. Always replace springs in axle pairs to maintain balanced suspension performance.

High-quality Leaf Spring Oem 62-1094, 2QK4146 2QK4146AM For American Truck: Mack

Certificates

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FAQ

Q: Can you produce according to the samples?

A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures.

Q: What is your terms of packing?

A: Generally, we pack our goods in wooden pallet.

Q: Can we print our own logo or label on the springs?

A: Yes, you can. We support logo print, label print, stamping, normally the print is free.

Q: What is your terms of delivery?

A: EXW,FOB,CIF,CFR,DDU

Q: What about the warranty?

A: We provide a one year warranty for our leaf spring.

As one of the most professional leaf spring for mack manufacturers and suppliers in China, we're featured by quality products and good service. Please rest assured to buy high-grade leaf spring for mack at competitive price from our factory.

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