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Snubbers (Pneumatic Shock Absorption)

When controlled deceleration is required at the end of the stroke of your mechanism, the Airpot snubber configuration is particularly useful. It performs push damping only and the push rod is not connected to the work.  Airpot’s snubbers (pneumatic shock absorption devices) are specifically designed to provide unparalleled energy dissipation accuracy by eliminating friction from  their working elements. The materials used have built-in lubricity, high strength-to-weight ratio, excellent stability under temperature/humidity extremes, close coefficients of thermal expansion, and non-deteriorating performance due to age or non-use. The basic parts are a graphitized carbon piston, precision ground to millionths of an inch TIR inside an annealed, borosilicate glass cylinder with a precision fire-polished bore. Airpot snubbers cover a wide range of low to moderate energy applications in which accurate control of impact, damping or shock absorption is required. The devices accomplish this by using the piston to force ambient air through an adjustable orifice at a controlled rate to dissipate kinetic energy and reduce impact, noise and wear. Airpot snubbers are available in 4 bore sizes ranging from 0.627” to 1.75” and strokes lengths of 1.1” to 2.3” Energy dissipation is infinitely adjustable via the variable orifice valve.

Snubber features (pneumatic shock absorption devices):

  • Not connected to the damped mass they are working with
  • Used in accurate end of stroke and shock absorbtion applications
  • Primary function is energy dissipation
  • One way only,(damping in compression)
  • Low force return spring for self resetting

For more information on our pneumatic shock absorption products, contact us today!  See us for all your other pneumatic damping needs as well.




Model:2KS160S - Bore Size: .627" (15.93 mm)2KS240S - Bore Size: .945" (24 mm)2KS325S - Bore Size: 1.281" (32.53 mm)2KS444S - Bore Size: 1.750" (44.4 mm)
BORE (inches)0.6270.9451.2811.75
STROKE1.11.32.32.3
ENERGY CAPACITY (FT-LBS)0-.30-.750-30-7
SPRING FORCE EXTENDED (LBS)0.160.130.250.25
SPRING FORCE RETRACTED (LBS)0.280.270.50.5
PUSH ROD RESET TIME - VALVE FULLY OPEN30ms60ms70ms161ms
PUSH ROD RESET TIME - VALVE FULLY CLOSED50ms90ms150ms430ms
FRICTION COEFFICIENT (approx.) Static and dynamic0.20.20.20.2
PISTON FRICTION (without side load) : grams<1<1<4<8
OPERATING TEMPERATURE RANGE *NOTE: If operating at temperatures over 70 degrees C (158 degrees F) please advise factory- 55C to +150C- 55C to +150C- 55C to +75C- 55C to +75C
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