39Q6-42120 39Q6-42121 Angular Contact Ball Bearing Final Drive Bearing for Hyundai R220LC-9 R210LC-9 Travel Gearbox

The 39Q6-42120 final drive bearing is an angular contact ball bearing used in selected Hyundai excavator travel reduction gearboxes. It is an important internal component of the final drive assembly, supporting rotating gearbox parts under combined radial and axial loads.

The related part number 39Q6-42121 is also referenced in aftermarket bearing catalogs. Buyers should verify the exact part number and bearing specifications before selecting a replacement.

The dimensions are from aftermarket parts references and must be checked against the actual supplied bearing.

Angular contact ball bearings are designed to accommodate radial and axial forces in rotating mechanical assemblies.

In an excavator final drive gearbox, bearing selection depends on the shaft arrangement, housing dimensions, bearing orientation and gearbox configuration.

Correct dimensions and installation are important for maintaining the intended positioning of rotating components.

The 39Q6-42120 bearing is listed in Hyundai travel reduction gearbox parts diagrams. Typical applications include:

• Excavator final drive maintenance
• Travel reduction gearbox rebuilding
• Travel motor assembly repair
• Construction machinery transmission maintenance

The bearing is an internal gearbox component and should not be confused with a complete travel motor or final drive assembly.

Parts references identify the 39Q6-42120 bearing in travel reduction assemblies used on selected Hyundai excavators, including:

• Hyundai R220LC-9S
• Hyundai R210LC-9

Compatibility with other Hyundai models, including R225LC-7 and R215LC-9, should be confirmed using the corresponding equipment parts catalog and travel reducer configuration.

A matching excavator model alone does not guarantee bearing interchangeability.

Before purchasing a replacement bearing, check the following information:

1. Original bearing part number and markings
2. Inner diameter, outer diameter and width
3. Angular contact bearing construction
4. Travel gearbox assembly number
5. Excavator model and machine serial number
6. Mounting arrangement and lubrication requirements

The part numbers 39Q6-42120 and 39Q6-42121 should be checked carefully before substitution.

When replacing a final drive bearing, inspect the related shaft surfaces, housing seats, lubrication conditions and adjacent sealing components.

Check the original gearbox assembly arrangement and follow the applicable equipment maintenance procedure.

Bearing selection and installation should be performed according to the requirements of the specific travel reduction gearbox.

This product is suitable for excavator spare parts distributors, construction machinery maintenance workshops and travel gearbox rebuilding businesses.

For product identification and quotations, please provide:

• Required part number
• Excavator model
• Travel reducer assembly number
• Original bearing photos
• Order quantity
• Delivery destination

Contact us for Hyundai excavator final drive bearing inquiries, replacement parts identification and wholesale quotations.