YNF17570 Swing Shaft 2053920 for Hitachi ZX70 Excavator – 12-32 Teeth, 223H

The YNF17570 Swing Shaft is a precision-engineered replacement component for the Hitachi ZX70 excavator. Featuring 12-32 teeth, this shaft is designed to transmit torque from the swing motor to the upper structure, ensuring smooth and reliable rotation. Constructed from high-strength alloy steel, it is heat-treated for durability and resistant to wear, vibration, and heavy-duty operation, maintaining optimal machine performance.

• Compatible with Hitachi ZX70 / 223H excavators

• 12-32 teeth design for precise torque transmission

• High-strength, heat-treated alloy steel for long service life

• Ensures smooth swing operation under heavy loads

• Reduces wear on bearings and related components

• OEM-standard fit for direct installation

• Resistant to impact, vibration, and harsh working conditions

• Essential for restoring or maintaining proper swing performance

Used as a swing shaft / rotary shaft in Hitachi ZX70 excavators, ensuring reliable upper structure rotation in excavation, construction, and material handling operations.

We provide part verification, installation guidance, and maintenance advice for optimal swing system performance.

Each swing shaft is protected with anti-rust coating, wrapped in foam, and shipped in reinforced crates to prevent damage during transit.

1. How many teeth does this swing shaft have?
It features 12-32 teeth for proper engagement with the swing mechanism.

2. Which models is it compatible with?
Hitachi ZX70 excavators, specifically the 223H variant.

3. What material is the shaft made from?
High-strength alloy steel with heat treatment.

4. How do I know if the swing shaft needs replacement?
Look for uneven swing movement, unusual noises, or wear on gear teeth.

5. Is special tooling required for installation?
Standard mechanical tools and proper torque settings are sufficient.