×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

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!
*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

Magnet

thread340-18459

Magnet

Magnet

(OP)
I'm working on a project that requires a hand held magnetic that can be easily turned on and off. Does any one have any suggestions as to where I can find such a magnet.

Another option is to use a permament magnetic, however I will need a guard so that magnetic fields are shielded. The guard must be easy to remove without difficulty.

Thanks

RE: Magnet

The only way to turn off a permanent magnet is either to short circuit it with a piece of iron (and a force will be required to withdraw it) or to shield it, at least in the direction of interest, with an iron sheet.
Otherwise an electromagnet seems to be able to do what you want, but you should specify more (geometry, force, distance,...) to find a specific product.


prex
motori@xcalcsREMOVE.com
http://www.xcalcs.com
Online tools for structural design

RE: Magnet

Hi This is Chams from Magnetic Solutions,
The only way to turn off a permanent magnet is to use  two
Halbach cylinders, one inside the other. The 2 HC produce the same magnetic field B . The out side cylinder turn aroud the inside one to change the magnetic field from 0 T to the maximum field 2B.

Chams       
CBenabderrahmane@magnetic-solutions.com
www.magnetic-solutions.com
  

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! Already a Member? Login

Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now
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