Cushion Deceleration Time Estimator

Estimate the cushion deceleration time and peak pressure at the end of a cylinder stroke.

Cushion deceleration

Cushion deceleration is computed deterministically from the parameters encoded in this page's address, so the same inputs always produce the same result and the same OAS-XXXX verification hash.

Peak cushion pressure

Peak cushion pressure is computed deterministically from the parameters encoded in this page's address, so the same inputs always produce the same result and the same OAS-XXXX verification hash.

Deceleration time

Deceleration time is computed deterministically from the parameters encoded in this page's address, so the same inputs always produce the same result and the same OAS-XXXX verification hash.

Engineering summary

Governing parameters and computed results for Cushion Deceleration Time Estimator.

Governing parameters and computed results for this calculation
Parameter Value
Bore 4

Frequently asked questions

How is hydraulic cylinder push force calculated?
Push force is system pressure times the full-bore piston area: F = P·π·D²/4. Pull force uses the annular area instead: F = P·π·(D²−d²)/4, so a cylinder always pulls less than it pushes.
What buckling safety factor does a cylinder rod need?
Target a Euler buckling safety factor of at least 4 for external-pressure service. The critical load is P_cr = π²·E·I/(K·L)², where K depends on the rod end condition: 1.0 pinned-pinned, 0.7 fixed-pinned, 0.5 fixed-fixed.
How do I estimate cylinder cycle time?
Cycle time is the extend time plus the retract time: t = L/v₁ + L/v₂, where v₁ and v₂ are the extend and retract piston speeds from pump flow divided by the respective areas. Retract is faster because the annular area is smaller.