Joe AutoDrill wrote:
problem.

I sell a product that acts basically like an air cylinder. It has a tube
(hard chrome plated inside for you metal guys) with a quill (hard chrome
plated also) and some rubber seals inside.

After 2-3 years of running like this, the unit doesn't stroke so well. The
seals are dried out and the cylinder, although still sealed properly, needs
up to 80 PSI air to stroke at all. Normally, they stroke at 15 PSI or so...

Anyone know of a lubricant that could be used that would not cause medical
(food grade or better maybe?) issues?


Everyone else has given you the sensible answers.

Use heat shrink Teflon tubing over the cylinder. Machine to size.

Kevin Gallimore