Rare-earth Neodymium magnets can have an attractive pull force of up to 1,000 times the weight of the magnet. This property allows engineers to specify a particularly small magnet for a stay-in-place operation. It can also make it difficult to find an appropriate mechanical fastener (screw / bolt etc.) to hold that small magnet in place. Enter Dura’s adhesive-backed Neodymium magnet discs. Because these magnets are designed with the fastener “built-in,” they give design engineers flexibility and cost savings by allowing production / assembly staff to apply the magnets instantly to a work piece without the need for another component fastener.
Not all adhesive backings are equivalent. Keep in mind our opening statement that neodymium’s magnetic force can be far greater than the weight of the magnet. It is important to be sure that the adhesive force is strong enough to prevent the separation of the adhesive from the magnet, or the separation from the substrate material to which the magnet/adhesive is attached.
For this reason, we specifically sourced an extremely strong acrylic adhesive “tape” capable of providing greater-than-magnetic-strength for Dura magnetic discs. All adhesive-backed Neodymium magnets from Dura Magnetics feature 3M™ Double Coated Laminating Adhesive 300LSE Tape which provides high bonding strength to most surfaces, including powder coated paints and many low-surface-energy plastics like polypropylene. The 3M™ adhesive also provides excellent adhesion to surfaces contaminated lightly with oil typically used with machine parts.
Another prominent feature of our magnets discs with adhesive backing is that each contains a small pull tab extending beyond the circumference of the magnetic disc. This pull tab allows for ease of separation of the liner sheet exposing the adhesive.
Also of note is that we offer both North Facing and South Facing variations of each standard sized adhesive-backed magnet. Since the adhesive backing will cover one side of the magnet, it is important to consider which pole of the adhesive-backed magnet will be uncovered, particularly in applications that require the use of the magnet to attract another magnet.
In addition to our in-stock, standard sized adhesive-backed Neo magnets, Dura offers adhesive backed steel disks for installations requiring a hold-to component. Neodymium magnets with adhesive backing are ideal for a wide range of applications, including door and cabinet latches, packaging, box closure, and folder and note box clasps, purses, jewelry, and more.
As with all magnetic applications, we are happy to assist in selection for most appropriate sizing and pull strength recommendations. In addition, you may find our Neodymium Pull Force Calculator application helpful in determining sizes.