Why Is the AirTAC SC Force Chart Important?

When selecting a pneumatic cylinder, many people only look at:

1. Bore size
2. Stroke length
3. Cylinder dimensions

but forget the most important factor:

👉 Actual cylinder pushing force

If the force is selected incorrectly:

1. The cylinder may fail to push the load
2. The machine may vibrate
3. Air consumption increases
4. System lifespan decreases

👉 That is why:

1. A cylinder force chart is one of the most important references in pneumatic system design.

How Is Pneumatic Cylinder Force Calculated?

Cylinder force depends on:

1. Air pressure
2. Piston area
3. Cylinder bore

F=P×AF = P \times AF=P×A

Where:

1. F = Force
2. P = Air pressure
3. A = Piston area

👉 Larger bore:

1. Larger piston area
2. Greater pushing force

Why Do Cylinders Produce Different Force at the Same Pressure?

For example:

1. SC32
2. SC63
3. SC80

may all operate at:

1. 6 bar

👉 However:

1. Larger bore cylinders generate much greater force.

👉 These are common reference values used in real industrial applications.

Why Is Actual Force Sometimes Lower?

In real applications:

1. Friction
2. Air loss
3. Side load
4. Incorrect alignment

can all reduce actual cylinder force.

👉 Therefore:

1. Never choose a cylinder exactly equal to the required load.

In most applications:

1. A 30–50% safety margin is recommended.

How Much Extra Force Should You Choose?

This is one of the most common mistakes.

Example:

1. Required load = 50kg
2. Selected cylinder force = 50kg

👉 Result:

1. Weak cylinder performance
2. Unstable operation
3. Faster seal wear

Safe Force Selection Rule

In most cases:

1. Recommended safety margin:
2. 30–50%

Example:

1. Actual required force = 100kg
2. Recommended cylinder force:
3. 130–150kg

👉 This helps:

1. Improve stability
2. Extend lifespan
3. Reduce vibration

Should You Choose SC63 or SC80?

This is a very common question.

When Should You Choose SC63?

SC63 is suitable for:

✅ Medium loads

✅ Pneumatic jigs

✅ Medium-sized automation machines

✅ Lower air consumption requirements

👉 Approximate force:

1. ~180–190kgf

When Should You Choose SC80?

SC80 is suitable for:

✅ Heavy loads

✅ Pneumatic press machines

✅ Long stroke systems

✅ Large industrial automation systems

👉 Approximate force:

1. ~290–300kgf

Why Bigger Bore Is Not Always Better

Many people think:

1. “Bigger bore means better performance.”

👉 This is a common mistake.

Oversized cylinders may cause:

1. Excessive air consumption
2. Jerky movement
3. Strong impact force
4. Reduced positioning accuracy

When Should You Avoid Increasing Bore Size?

Avoid oversized bore if:

❌ The load is light

❌ High speed is required

❌ Smooth operation is important

❌ Installation space is limited

👉 In these cases:

1. Compact cylinders
2. Guided cylinders

may be better solutions.

Factors That Affect Actual Cylinder Force

Air Pressure

Lower pressure:

1. Produces lower force

👉 Example:

1. 4 bar generates much less force than 6 bar.

Side Load

If the load is off-center:

1. Cylinder vibration increases
2. Piston rod wears faster

Airflow Capacity

If:

1. The valve is too small
2. Tubing is undersized
3. The FRL unit is clogged

👉 The cylinder may still become weak even with sufficient pressure.

Conclusion

The AirTAC SC force chart helps you:

1. Select the correct bore size
2. Choose proper pushing force
3. Reduce design mistakes
4. Improve system stability

👉 When selecting pneumatic cylinders:

1. Do not rely only on bore size
2. Always check the actual thrust table

👉 Most importantly:

1. Always include a 30–50% safety margin.