rubber bushing

Rubber bushings (also known as suspension bushings, rubber sleeves, or rubber liners) are the core shock-absorbing connectors on automotive chassis suspensions, swing arms, tie rods, and balance bars. They are metal sleeves on the inside and outside, with rubber wrapped in the middle, used to connect chassis components, protecting rigidity and filtering vibrations.

1、 Main function

Connect chassis components such as swing arms, subframe, balance bar, shock absorbers, etc

Buffer road vibrations, reduce noise, and prevent abnormal noises

Allow small movements of components to avoid metal collisions

Protect the wheel alignment angle and improve driving stability

2、 Common types

Lower arm liner (large quantity, most easily damaged)

Balance bar liner/opening adhesive

Rod bushing, connecting rod bushing

Shock absorber liner, tower top liner

Rear axle lining, subframe lining

3、 Typical materials

Natural growth rubber NR: good elasticity, comfortable, commonly used in the factory

EPDM: Strong aging and weather resistance, commonly used for exposed chassis parts

Polyurethane PU: harder, more practical, and highly supportive, often used for heavy loads/modifications

4、 Aging and damage manifestations

The chassis claps and makes abnormal noises on the rough road

Steering wheel shaking, deviation, and strong looseness

Tire uneven wear and tire eating

The body shakes greatly during sudden braking or turning