Product Overview
The Erayak balance shaft is a genuine replacement component designed to reduce engine vibration and improve rotational stability in gasoline generator engines. By counterbalancing internal motion, a high-precision balance shaft helps the engine run smoother, lowers mechanical stress, and extends overall service life. As a factory-original spare part, it provides consistent quality, reliable performance, and long-term durability — ideal for wholesale stocking, service centers, and generator spare-parts distributors.
For engine model compatibility or dimension confirmation, please contact your dedicated customer service representative.
Key Features
Enhanced Engine Smoothness
The balance shaft counteracts internal engine vibrations created during piston and crankshaft movement, helping the generator run more steadily under all operating conditions.
Reduced Mechanical Stress
By minimizing oscillation and rotational imbalance, it lowers strain on bearings, crankcase components, and engine mounts, extending overall engine lifespan.
Precision Machining & Stable Rotation
Made from durable, wear-resistant materials suitable for long operating hours. Ideal for generators used in construction sites, rental fleets, and continuous-duty applications.
High-Strength Alloy Construction
Supports clean ignition and efficient fuel burn, improving generator reliability for home backup, construction, and rental equipment.
Lower Noise and Improved User Comfort
A well-balanced shaft significantly decreases noise levels by reducing internal resonance, creating a quieter and more stable generator operation.
Direct-Fit Replacement Component
Designed as a direct-fit engine component, simplifying maintenance for technicians, repair shops, and distributors.
Balance Shaft Working Principles
- Rotates in coordination with the crankshaft to offset primary engine vibrations
- Uses counterweights to neutralize oscillation forces generated during combustion cycles
- Helps stabilize engine rotation during:
- Load fluctuations
- Acceleration and deceleration
- Long running periods
- Improves engine reliability, reduces wear, and enhances customer satisfaction by minimizing vibration-related issues.
A quality balance shaft keeps generator engines running smoothly, prolongs service life, and reduces warranty claims.
After-Sales & Dealer Support
- Spare Parts Coverage: Full accessory support for core Erayak generator models.
- Inventory & Lead Time: Fast-moving parts in stock. 24–72h dispatch for stock items.
- Matching Support: Model-based fitment confirmation to avoid wrong orders.
- Dealer Bulk Supply: Dealer pricing, MOQ and regional supply supported. Contact us for terms.
Erayak, founded in 2004, operates a modern manufacturing base in the Wenzhou Binhai Economic & Technological Development Zone. With dedicated workshops for generator systems, electrical components, and precision parts, we ensure stable quality through strict in-house QC and support OEM/ODM customization.
Why Choose Erayak Spare Parts?
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Genuine factory parts with consistent performance
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Stable engine operation and reduced return risk
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Complete product coverage for generators and small engines
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Large inventory and fast delivery for global buyers
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Multiple quality and pricing levels for different markets
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Professional support for fitment verification and sourcing
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Strong R&D capability and certified production (ISO9001)
Wholesale Support
Flexible MOQ, steady production capacity, and OEM/ODM cooperation available.
For pricing, MOQ, and compatibility, please contact customer service.
In many small gasoline generator engines, the balance shaft is a key mechanical component designed to reduce vibration and improve overall engine smoothness. Although it doesn’t directly create power like the piston or crankshaft, it plays an important role in helping the engine run quietly, reliably, and efficiently.
As part of the Erayak original spare-parts system, our balance shafts are designed and manufactured to meet strict OEM standards—ensuring stable performance and long service life for professional users and distributors.
Why Does a Generator Need a Balance Shaft?
When a generator engine operates, the piston and crankshaft move at high speed. This creates natural vibration forces inside the engine.
If these forces are not controlled, the engine may experience:
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Excessive vibration during running
Increased mechanical noise
Premature wear on bearings and engine mounts
Reduced comfort for users
Shortened engine lifespan
The Erayak balance shaft is engineered to address these issues effectively, supporting both equipment stability and long-term durability.
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