What is the function of end-of-stroke cushions in a cushioned cylinder?

What is the function of end-of-stroke cushions in a cushioned cylinder?

• A. Overheating.
• B. Rod and seal damage due to impact.
• C. Absorb impact at end of stroke to protect rod and seals.
• D. Increases friction and wear.

Answer: (C)

End-of-stroke cushions act as a damper that absorbs the piston’s kinetic energy as it reaches the end of travel. This gradual deceleration prevents a hard impact against the cylinder end, protecting the rod, seals, and bore from shock loads and potential damage. The cushioning force can usually be adjusted to suit different speeds and loads, delivering smoother, quieter cycles and longer component life by reducing seal extrusion and wear. Without cushioning, the piston would slam into the end cap, causing higher peak forces and more wear and noise.

End-of-stroke cushions act as a damper that absorbs the piston’s kinetic energy as it reaches the end of travel. This gradual deceleration prevents a hard impact against the cylinder end, protecting the rod, seals, and bore from shock loads and potential damage. The cushioning force can usually be adjusted to suit different speeds and loads, delivering smoother, quieter cycles and longer component life by reducing seal extrusion and wear. Without cushioning, the piston would slam into the end cap, causing higher peak forces and more wear and noise.