Ball Joints - Encapsulated vs Spring and Seat design

Ball Joints - Encapsulated vs Spring and Seat design

In the aftermarket, there are two main types of ball joint - Encapsulated and Spring and Seat. The question is often asked what is the difference and which one is more suitable.

Encapsulated design ball joints are ‘sealed for life', in other words they are completely maintenance free. They have a smoother feel during articulation and are mainly designed for passenger vehicles.
Spring and Seat ball joints are not sealed and are supplied with grease nipples for lubrication at regular intervals (TRW recommends servicing these joints at every oil change). They are typically found in older vehicles or light commercial/ 4WD vehicles as they are more suitable for load bearing vehicles.

All of TRW's aftermarket steering and suspension products are manufactured according to the original equipment design. When it comes to deciding between encapsulated or spring and seat design ball joints, TRW follow the OE specification. As such, the customer never needs to be concerned that they are being supplied a ball joint that may not be suitable for the vehicle.

All of TRW's ball joints are manufactured to exacting standards. The plastic seat within the ball joint is made from a unique material and designed to be completely smooth, while the ball pin remains rough, ensuring the optimum amount of friction between the parts. Specialised dust covers work to reduce to a minimum the amount of dust and foreign bodies or moisture entering the part, improving life span.

TRW have patented a grease formula which helps to avoid corrosion and increase durability. This grease is also supplied to some OE manufacturers.

This attention to the original equipment standards is what makes TRW stand out from other suspension and steering suppliers in the market.

For more information on TRW products, please contact Repco on 133227.