1 x Front Sachs Twin-Tube Steering Damper for Volkswagen Beetle 1970-1976

Twin-tube dampers have two oil-filled cavities: the working cavity in which the piston and piston rod move, and the compensating cavity. The compensating cavity is located between the working cylinder and the reservoir tube, and is filled 2/3 with oil and 1/3 with air or gas. As a result, the twin-tube damper has a shorter installation length than its monotube equivalent.

The damping force characteristics of the twin-tube damper are specifically designed for each vehicle type in that they are adapted to the vehicle weight, axle design and suspension springs.

1. Mounting joint

6. Protective tube

2. Piston rod seal

7. Reservoir tube

3. Piston rod guide

8. Piston valve

4. Piston rod

9. Working cylinder

5. Compensating cavity

10. Bottom valve

11. Mounting joint

Compression stage
Vehicle vibrations push the shock absorber together, with the bottom valve determining the damping.
The oil displaced by the retracting piston rod flows into the compensating cavity, where the bottom valve resists this flow and thus slows down the stroke.
The piston valve is open. In this state it functions as a non-return valve.

Rebound stage
Vehicle vibrations pull the shock absorber apart, with the bottom valve determining the damping.
The piston valve provides resistance against the oil that flows down from the cavity above the piston. This slows the upstroke.
Via the open non-return valve in the bottom valve, the oil required back in the working cavity can flow out of the compensating cavity without obstruction.

SACHS history

The history of the SACHS brand starts in 1894 when the toolmaker and name-giver Ernst Sachs filed his first bicycle wheel hub patent application

OE quality

SACHS products are manufactured from high-quality materials and reflect the state of the art. They stand for high performance and reliability. Every year, more than 10 million new vehicles equipped with SACHS dampers and shock absorbers roll off the production line.

Quality across borders

SACHS offers products for various fields of application that cover almost all vehicle types. This applies to the European as well as the Asian vehicle market.

Quality certification according to regulation (EU) No. 461/2010

Products sold by ZF Aftermarket under the SACHS brand are spare parts within the meaning of Article 1 Figure (1) h) of Regulation (EU) No. 461/2010 dated May 27, 2010, and meet the criteria of Figures (19) and/or (20) of the supplementary guidelines on vertical restraints in agreements concerning the sale and servicing of automobiles and the sale of automobile replacement parts to the aforementioned regulation.