Smart questions
Smart answers
Smart people
Join Eng-Tips Forums
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Member Login




Remember Me
Forgot Password?
Join Us!

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips now!
  • 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!

Join Eng-Tips
*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.
Jobs from Indeed

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

HAVENOIDEA (Mechanical) (OP)
12 Feb 08 9:23
Hello Everyone,

I am looking for a plastic material that I can make a shim and cylinder out of- it needs to be strong enough to support screw threads through its sidewalls, but have low enough friction to be able to effectively slide up and down. Low wear is also a necessity. Does anyone have any material ideas for plastic on plastic sliding? The pieces are for a film thickness guage that uses the Eddy current, so no metal can be near the tip. Thanks in advance.


Benjamin Tremblay
Pud (Mechanical)
12 Feb 08 11:22

Polyoxymethylene, commonly called acetal. Trade names Hostaform, Delrin amongst many, many others. Available in bar/sheet stock for machining or pellets for extrusion and injection mouldings.

Some injection moulding grades are available with PTFE in for even lower friction.

Easy to machine or mould.


Cheers


Harry
HAVENOIDEA (Mechanical) (OP)
12 Feb 08 11:52
Thanks Harry,

Would this material be available to rapid prototypers by any chance?


Ben
dgowans (Mechanical)
12 Feb 08 12:33
Ben,

I'm not aware of an additive RP process that uses acetal (SLS comes to mind as a possibility, but I've never seen an SLS part in acetal).  You can certainly have prototypes machined from acetal stock.
HAVENOIDEA (Mechanical) (OP)
12 Feb 08 13:42
Thanks guys,

Sounds good. This gives me a solid start. Appreciate it.

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!

Back To Forum

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close