I dug out a NOS air powered linear slide made by Festo.

The traveler runs on a linear way (ball bearings) and has a total
travel distance of about 1"

Its designed to be operated at high speed by air.

Entire unit is about 10" long, about 3.5" tall

Is this anything you need?

Got a photo if you need one.

Its Festo # is
DGPL-25-25-PPVA-K
Series L641

Free if you want it.



http://www.festo.com/net/en-us_us/Su...%20Catalog.pdf

Check in that link for the specs

I also have one that is about 4 FEET long if you need that as well.

If not..they go on Ebay.

Gunner