Grease Selection for Strut Bearings: Balancing Heat, Cold and Water

Role of Grease

Grease forms a film, separates metal and resists rust and water - without bleeding at heat or hardening in cold.

Requirements

• Heat stable: No bleed under braking or summer heat
• Cold start: Stays soft in winter for light steering
• Water resistant: Protects after washing or wading
• EP anti-wear: For high-frequency boundary conditions

Common Types

• Lithium: General purpose, cost-effective
• Lithium complex / polyurea: Better heat and life - OE common
• Solid-additive greases: Extreme conditions

Fill Amount

• Too little: wear
• Too much: churning and heat
• Typically 25-35% of internal space

Huami Tip

Right grease needs the right amount - Huami controls fill by weight on the assembly line.