Pneumatic Cushioning Seals

A pneumatic cushioning seal is an end-cap profile that seals around a cushion spear as a cylinder approaches the end of stroke. It traps air for controlled deceleration, then opens a return path in the opposite direction so the piston can begin its next stroke freely.

Key facts

Family: Pneumatic Seals
Common types: Snap-in cushion ring, Floating cushion seal, Vented damping seal, Metal-insert cushion seal
Materials: Polyurethane, NBR, FKM (fluoroelastomer), Steel insert
Used in: Conveyor diverters, Sorting equipment, Automation cylinders, Foundry air rams, Packaging machines

Enquire on WhatsApp Email us

Types

Snap-in cushion ring
Floating cushion seal
Vented damping seal
Metal-insert cushion seal

Materials

Applications

Conveyor diverters
Sorting equipment
Automation cylinders
Foundry air rams
Packaging machines

What to send for a quote

cushion spear diameter
end-cap groove diameter
groove width
cylinder bore
air flow arrangement

Questions about pneumatic cushioning seals

What should I send to identify pneumatic cushioning seals?

Send cushion spear diameter, end-cap groove diameter, groove width, cylinder bore, air flow arrangement. Show all moulded notches or vents because these small features control free return flow and installation orientation. A clear photograph, drawing or readable reference can resolve details that dimensions alone do not show.

How should I select pneumatic cushioning seals?

Match the one-way sealing and bypass features to the spear, end-cap passages, approach speed and desired cushioning function. Confirm the mating parts and operating environment before ordering, since an apparently similar size can use a different profile, material or internal arrangement.

Last updated: 2026-10-08