×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Coiled tube ummm "spring"...

Coiled tube ummm "spring"...

Coiled tube ummm "spring"...

(OP)
I am looking for a coiled tube that will act as a spring of sorts. force to expand/contract is not important, in fact less is better, but I need it to expand and contract many times rapidly without fatiguing and breaking. Does anyone know of such a thing? Ideally the tube would be .0625-.125 I.D., and the coil spring would be 3/4" O.D. or so.

Thanks in advance for any help!

Jake

RE: Coiled tube ummm "spring"...

Bourdon Tube?
B.E.

The good engineer does not need to memorize every formula; he just needs to know where he can find them when he needs them. Old professor

RE: Coiled tube ummm "spring"...

Grab some annealled tubing and coil it. Or order it that way from a custom spring shop. We roll our own here, but it's a 10" diameter coil of 3/8 OD tube. Works just fine, but we limit the stroke to keep the stress well below the predicted fatigue life we want to achieve. I'd have to dig a bit to find my equations for a coiled tube spring, but you should be able to derive them if you have a copy of Wahl's book on coil springs.

You don't specify the type of tubing you want - McMaster Carr has plastic (nylon and other) tubing in 1.5" o.d. coils.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources