[billbo911]

There is an alternative that might get you going and still have you using the pistons available from Bimba even if they do not meet your needs exactly.

This will work if the stroke you need is somewhere between two lengths that are available.

Select the piston that has the stroke that is the next length beyond your needs. Then cut a sleeve of tubing, you choose the material, that is the length difference between what you need and what you ordered. Make sure the ID of the tubing is large enough to slide over the piston rod and allow the rod to slide through it easily. (Make sure there are no burs on the inside of the sleeve that could scratch the rod's surface.) Now when the piston is fully retracted, it will be held out by the sleeve. When it is extended, it will travel exactly the distance you needed. The only caveat is that the overall length of the piston is a bit longer than a custom cylinder.

Here is a picture of this in use. This system is in a relaxed state, so the sleeve is loose, but I think it explains what I mean.