Thrust Bearing vs Flat Bearing: Car Steering Bearing Explained

Name Clarification

Thrust bearing, flat bearing, axial bearing refer to the same part in car suspension: a rolling bearing inside the strut mount that carries axial load and allows steering rotation.

Function

• Carries body weight (axial load)
• Lets the strut rotate when steering
• Reduces steering effort

Structure

• Balls or rollers in a flat arrangement
• Upper/lower races bonded to mount rubber
• Sealed to retain grease, keep out dirt

Common Failures

• "Pop" when turning in place (worn balls/dry grease)
• Heavy steering, poor return
• Play causing tower noise

Selection

Choose quality bearing steel with good seals. Huami makes strut bearings (machined cores/tubes + finished bearings) to OE quality.