What Are Axle Bearings?
Axle bearings are mechanical components used to support the rotation of the axle while allowing it to spin freely within its housing or axle tube. They are essential in automotive, industrial, and heavy-duty equipment applications where rotating axles are present.

---

Function of Axle Bearings

Axle bearings:

• Support the axle shaft and maintain its alignment.
• Reduce friction between moving parts.
• Carry radial and axial loads exerted by the vehicle or machine.
• Seal out dirt, debris, and moisture to prevent damage and ensure longevity.

Location and Application

• Rear Axle Bearings: Support the rear axle shaft; critical in both live axle and independent suspension designs.
• Front Axle Bearings: Typically integrated into wheel hubs (especially in FWD vehicles).
• Drive Axles: Found in axles transmitting power from differential to wheels.

---

Symptoms of Failing Axle Bearings

• Grinding or humming noise from wheels.
• Vibration or wobble at speed.
• Leaking axle grease near the wheel hub.
• Uneven or rapid tire wear.

---

Materials and Design

• Typically made of hardened steel.
• Designed to withstand high rotational speeds, temperature extremes, and contaminants.
• Sealed or semi-sealed to protect internal components.