How do you make a Power Cord Spring?

You don't. That cord was manufactured that way. You can try to coil it around a pipe to shape the coils and they will exhibit some small amount of recoil, but it won't be like you are used to. You can afix (tape) a spring to the cord near where it secures to the motor and back somewhere near where the motor normally sits and that should work.

You don't.

Try a search for "koil cord".

The cord is a commercial item.

Lew

You can order one from Whitney Blake.

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Gerald Ross Cochran, GA

Please provide supporting documentation.

You buy one. These things are available (in the UK anyway) as coiled kettle leads.

Or else you take a normal piece of extra-flexible powertool flex, coil it loosely by hand, and run it over a tensioned wire or length of elastic to hold it in place.

Thank you everyone for helping out with your comments. I ended up going to the site Gerald mentioned above. They were pleasant on the phone to deal with and will ship out today. The only thing is that I will have to splice the wire because I wasn't going to pay for a special run of a single cord ($100 setup fee).

Again, thanks for all the help.

I must be sane then. I don't have 3 close friends.

I know you already found one, but just for the sake of speculation, I wonder if a guy could pull braided wire through a coiled air hose to get a similar effect. It's almost certainly not up to a standard electrical code, but it might do in a pinch...