Product Introduction

The 3953250110 Balance Shaft is one of the most important structural components in the rear tandem suspension system of Mercedes-Benz SK series and Beiben NG80 heavy-duty trucks.

Installed inside the chassis connection cradle (balance shaft bracket), the shaft acts as the pivot point for the equalizer beam, allowing the suspension to oscillate freely while distributing vehicle weight evenly across both rear drive axles.

The balance shaft works together with:

• Equalizer beam
• Chassis connection cradle
• Suspension bracket
• Bronze bushings
• Oil seals
• Leaf spring assembly
• Rear axle housing
• Suspension mounting bolts

Its primary functions include:

• Supporting the equalizer beam pivot
• Balancing loads between tandem rear axles
• Improving suspension flexibility
• Reducing chassis stress
• Increasing vehicle stability and ride comfort

Heavy-duty trucks operating under full-load conditions are subjected to continuous impact loads, twisting forces, and suspension movement. A worn or damaged balance shaft may cause:

• Excessive suspension play
• Uneven axle load distribution
• Rapid bushing wear
• Suspension noise
• Poor driving stability
• Premature suspension component failure

The 3953250110 balance shaft is manufactured from premium 42CrMo forged alloy steel using precision forging, CNC machining, and induction heat treatment. The bearing journals are ground to OEM tolerances, ensuring smooth rotation, precise fitment, and extended service life.

Designed according to OEM specifications, this balance shaft provides direct replacement compatibility for Mercedes-Benz SK and Beiben NG80 rear suspension systems. It is widely used in fleet maintenance, suspension rebuilding, mining trucks, construction vehicles, and heavy commercial transportation. OEM references identify 3953250110 as the chassis connection cradle shaft used in Mercedes suspension assemblies.

Each balance shaft undergoes comprehensive quality inspections including:

• Material composition analysis
• Hardness testing
• Journal diameter inspection
• Straightness measurement
• Surface finish verification
• Installation fitment testing

to ensure OEM-level quality, durability, and reliability.

Technical Specifications

Vehicle Fitment

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