Products Description
CG430/CG520 Brush Cutter Gearbox – 28mm x 9T Direct Replacement
Precision Gear Head for 43cc–52cc Brushcutters
This 28mm x 9T gearbox is a direct replacement transmission component for CG430, CG520, and compatible 43cc–52cc brushcutters. The gearbox is a critical power transmission component that transfers engine power from the drive shaft to the cutting attachment, utilizing internal bevel gears to reduce speed while increasing torque for efficient cutting performance .
Designed specifically for 28mm diameter drive shafts with a 9-spline (9T) configuration, this gearbox matches the original factory specifications for the CG430/CG520 platform . High-quality replacement gearboxes feature precision bearings and durable construction that reduce vibration, improve operator comfort, and prevent overheating .
Technical Profiles & Materials
Precision 28mm x 9T Specification – This gearbox is engineered for a 28mm outer drive shaft tube with a 9-spline inner shaft configuration, ensuring precise engagement with the drive system and efficient power transfer. The 9-spline output provides secure attachment and efficient torque transfer .
Broad Model Compatibility – Designed to fit a wide range of 43cc and 52cc brushcutters, including:
CG Series: CG430, CG520
Other Models: BC430, BC520, 40-5, 44-5, TL43, TL52
Engines: 1E40F-5 (42.7cc), 1E44F-5 (51.7cc)
Durable Construction – Manufactured from robust cast iron or heavy-duty alloy housing with precision bevel steel gears, designed to withstand heavy impacts and field abuse. The robust construction reduces vibration for smoother, quieter operation and extends service life in agriculture, gardening, and landscaping tasks . The gearbox features precision bevel gears that minimize vibration .
Easy Installation – Designed as a direct bolt-on replacement requiring standard workshop tools. The gearbox assembly includes the output shaft and mounting hardware, simplifying the replacement process and minimizing equipment downtime.
Technical Specifications
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Products Application
Brushcutter Gearbox Replacement
Direct replacement when the original gearbox becomes worn, noisy, or fails to transfer power to the cutting attachment. Common symptoms include grinding noises, excessive vibration, or the cutting head not rotating. This gearbox restores full cutting function on CG430, CG520, and compatible models used in professional landscaping and grounds maintenance.
Professional Landscaping & Grounds Maintenance
For contractors and grounds maintenance crews operating multiple CG430/CG520 brushcutters, keeping a replacement gearbox on hand minimizes downtime. The pre-assembled unit allows for quick field replacement, ensuring equipment returns to service with minimal interruption. The precision bevel gears are designed for grass trimming, heavy weeding, and light brush clearing, reducing vibration and extending service life .
Workshop & Repair Service
For repair centres servicing CG430, CG520, BC430, BC520, and compatible brushcutters, this gearbox simplifies repairs by providing a complete drop-in replacement. The 28mm x 9T configuration is compatible with most two-stroke petrol trimmers with 43 and 52 cc engine capacities or piston diameters of 40 and 44 mm , making it a versatile stock item for workshops.
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FAQ
Q: How do I confirm this gearbox fits my brushcutter?
A:Check your machine model number and measure the drive shaft tube diameter (28mm). This gearbox is compatible with CG430, CG520, BC430, BC520, TL43, TL52, 40-5, 44-5, and compatible 43–52cc brushcutters . The 9-spline (9T) configuration is standard for 28mm shafts, with 7T options also available on some variants .
Q: What are the symptoms that indicate the gearbox needs replacing?
A: Common symptoms include grinding noises from the gear head, excessive vibration during operation, the cutting head not rotating, or the cutting attachment binding. These symptoms indicate internal gear wear or bearing failure, requiring immediate replacement to prevent further damage.
Q: Is the gearbox compatible with both 43cc and 52cc engines?
A: Yes. The CG430 (42.7cc/43cc) and CG520 (51.7cc/52cc) share the same drive shaft diameter (28mm) and spline configuration (9T) . The gearbox is compatible with 1E40F-5 (43cc) and 1E44F-5 (52cc) engine platforms .
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