pneumatic cylinder use

Will you use the cylinder to hold an object in place, by extending the piston?

Sir,

I am using the pneumatic cylinder to clamp an object while the operations occurs,

If you are not understanding my question then i will send to you a drawing for this question.

Thanking you

Mohammad irfan

There are two ports on most cylinders. Apply air to one port, the piston deploys. Apply air to the other port, piston retracts.

This is so straight forward that I can't think of anything else to add. It's up to you to design the part nest/holder.

I'm not aware of any formulas for this.

can you explain the question in better way?

Congratulations. You must be a true genius. How did you ever wangle a job as a tool designer?

Fluid Power Basics
Practical knowledge about hydraulic and pneumatic components and systems

http://www.hydraulicspneumatics.com/200/eBooks/Article/True/67859/

The pressure being added to the cylinder ports, and the formula for the area of a circle should be all you need. As stated by other posters, the function of a pneumatic cylinder is elementary.