Doosan DX230 172447-57600 Slewing ring bearings for crawler excavator parts

Doosan DX230 172447-57600 Slewing ring bearings for crawler excavator parts

List of spare parts

There are two main types:

(1) Ball-Type Swing Bearings

• Uses steel balls as rolling elements.

• Best for small to medium excavators (lower load capacity).

• Advantages: Smoother rotation, lower cost.

• Disadvantages: Less durable under extreme loads.

(2) Roller-Type Swing Bearings

• Uses cylindrical or tapered rollers.

• Designed for large excavators and heavy-duty applications.

• Advantages: Higher load capacity, longer lifespan.

• Disadvantages: Slightly less smooth rotation.

Which One Is Better?

• Small excavators (1-20 tons): Usually ball-type.

• Large excavators (20+ tons): Typically roller-type.

Common Materials & Manufacturing Process

Materials Used:

• Rings: High-carbon chromium steel (e.g., 42CrMo, 50Mn).

• Rolling Elements: Hardened alloy steel.

• Gear Teeth: Induction-hardened for wear resistance.

Manufacturing Steps:

1. Forging – Shaping steel into rings.

2. Machining – Precision cutting of raceways and gear teeth.

3. Heat Treatment – Hardening for durability.

4. Grinding & Assembly – Smoothing surfaces and adding seals.