Estimate pneumatic cylinder extend and retract speed using cylinder size, flow rate, and simplified free-air assumptions for automation systems.
This is a first-pass speed estimate. It helps you see whether your cylinder motion is in the right range before getting deeper into valve Cv, regulator performance, exhaust restriction, cushioning, and real load effects.
Speed should be checked after force and air demand. A system can have enough force and still miss cycle time if the available flow is not there.
Start with force, estimate air demand, check speed, then verify line capacity.
Estimate pneumatic cylinder extend and retract speed using cylinder size, rod diameter, stroke, and supplied flow rate.
This calculator is useful for preliminary cylinder timing estimates, pneumatic sizing, valve selection, and automation cycle time planning. It should be treated as an early engineering estimate, not a final validated motion model.
General-purpose example for a common bore, rod, and flow combination.
Shows how larger cylinder volume can slow motion if flow stays the same.
Shows the effect of increasing available SCFM on cylinder timing.
This is a simplified estimate using standard cubic feet per minute converted to free air volume. Real cylinder speed depends heavily on pressure, valve Cv, tubing length, regulator performance, load, cushioning, exhaust restriction, and meter-in or meter-out control. The current calculation approach was preserved from your existing page logic. :contentReference[oaicite:1]{index=1}
Save setups, reload prior inputs, and reuse common checks.
Useful for cylinder timing checks, early valve sizing, automation cycle planning, tooling motion review, and deciding whether pneumatic motion is fast enough for the application.
Speed has to be reviewed alongside force and air demand. If the numbers here look slow, the issue may be valve flow, line size, regulator performance, or simply too much cylinder volume for the available air.
Use this first if you still need to confirm the cylinder can actually generate enough usable force.
Use this to estimate the cylinder’s air demand per cycle and how much system capacity it needs.
Use this next to verify tubing and supply sizing so the speed estimate is achievable in practice.
This calculator is typically used during early design or troubleshooting to estimate whether a cylinder can meet the required cycle time. While the math is straightforward, real cylinder speed is heavily influenced by valve flow capacity, pressure stability, exhaust restriction, and system layout.
A cylinder may calculate to move in 0.3 seconds based on available SCFM, but if the valve Cv is too low or the exhaust path is restricted, the actual motion can slow significantly.
This often shows up as inconsistent cycle times or stations falling behind the required takt time.
Cylinder speed should be evaluated alongside force and air consumption. A system that has enough force may still fail to meet cycle time if airflow is limited or poorly distributed.
This page is best used as a first-pass screen before you dig into valve sizing and detailed motion tuning.
If you need help with cylinder sizing, valve selection, pneumatic timing, or overall machine motion behavior, use the support path below.
These pages work best together and support the same pneumatic sizing workflow.