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The Various Forms of Disc Magnets and Their Applications

Disc magnets, put simply, are an incredibly strong magnet produced through a process involving making alloys from natural elements. Usually, the elements used are rare earth metals (or ‘rare earth elements’), in most cases, neodymium. Rare earth metals are termed as such because they are components of a class of the periodic table of the elements classified as ‘rare’. However, these ‘rare’ earth metals are actually quite easy to come across, as they are considered to be a byproduct of mining for minerals. Other types of disc magnets include ceramic magnets, made by creating a mix of iron, ceramic and alnico (a combination of nickel, cobalt, copper, aluminium, iron and occasionally titanium). However, as ceramic magnets are weaker in terms of magnetism than rare earth magnets, ceramic magnets are not used as frequently by manufacturers commercially.

The most powerful disc magnet is, by far, the neodymium magnet. Although the neodymium magnet is just one millimeter in diameter, this type of magnet contains enough force such that it can erase an entire hard disk drive. However, neodymium magnets are rather brittle – should two neodymium magnets clash together, they will shatter, sending out shards with enough force to cause injury. In addition, neodymium magnets can break a finger should a person holding two magnets lose their grip on one of them. Neodymium magnets, which were first manufactured by well-known corporation General Motors, are created by combining neodymium with iron and boron. Another type of disc magnet, known as the ‘SmCo’ magnet, is made by combining samarium and cobalt, although this is much more expensive than typical neodymium magnets.

In recent years, the use of disc magnets in the commercial world has increased. Neodymium disc-shaped magnets have been phased in to replace magnet types such as alnico and ferrite magnets, as neodymium magnets are small yet very powerful. For example, the growing trend for manufacturers to make much more powerful computer speakers and hard drives has led to the increased uptake of neodymium magnets, as the manufacturers require very small magnets to fit inside small electronic parts. For example, in many hard drives, the thin plate opposite the read-write disks contains a small neodymium magnet. In addition, another neodymium disc magnet lies below the plate inside an actuator. Although the majority of the newer hard drives on the market contain two magnets, a minority contain just one, rendering them less powerful than their dual-magnet counterparts. The power of neodymium magnets when compared with alnico magnets may be demonstrated in this context – an alnico magnet ten times the equivalent size of a neodymium magnet must be used to achieve the same force inside the hard drive. This goes to show that neodymium magnets are much stronger than their alnico equivalents!

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Body Max Magnetic Dual Trainer

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rooCASE Dual-View Multi Angle (Magenta) Genuine Leather Folio Case Cover for Amazon Kindle Fire 7-Inch Android Tablet $13.95 Keep your Amazon Kindle stylishly well-protected in the rooCASE Dual View Leather Case for Amazon Kindle Fire Tablet. This leather case features a pebble-grain texture, and it’s available in several colors. It comes with a handheld sleeve for handheld operation, and it has three grooves for multi-angle viewing. It has a magnetic flap closure, and it provides access to all your favorite device’s po…

rooCASE Dual-View Multi Angle (Black) Genuine Leather Folio Case Cover for Amazon Kindle Fire 7-Inch Android Tablet $13.95 Keep your Amazon Kindle stylishly well-protected in the rooCASE Dual View Leather Case for Amazon Kindle Fire Tablet. This leather case features a pebble-grain texture, and it’s available in several colors. It comes with a handheld sleeve for handheld operation, and it has three grooves for multi-angle viewing. It has a magnetic flap closure, and it provides access to all your favorite device’s po…

CaseCrown Bold Standby Case (Black) for the new iPad & iPad 2 (Built-in magnet for sleep / wake feature) $18.23 Protect your new iPad / iPad 2 with this CaseCrown Bold Standby Case at all times! This case sports a simple and classy design made from faux leather, and the interior is lined with non-scratch material so you do not need to worry about any damages. There is also a magnetic strip built inside for a secure closure. It even provides the sleep / wake feature making your new iPad / iPad 2 go to sleep …

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Briggs & Riley Action Duffle (Black) $199 A great carry-on with a roomy main compartment allows duffle bag to be easily packed and organized, Mesh elastic pocket holds socks or undergarments, Shoe compartment in side pocket with snap-down expansion into main compartment, U-shaped opening allows for easy access into duffle, SpeedThru pocket for hassle-free airport security luggage checks. Orange lining alerts when pocket is open, Gusseted front pocket with a key keeper and slip pockets for tickets and magazines, Lid pocket can be used for laundry, jacket or accessories, Waterproof side pocket perfect for damp items or toiletries with exterior slip pocket for a newspaper, Zippered water bottle pocket holds beverage, Dual purpose, slip-through back pocket slides over the Outsider handle of other Baseline luggage for easy transport. Magnetic closure secures bag in place, Use webbing handles or crossways shoulder strap for easy carrying, Elastic, hide-away ID card conceals personal info. Interior window allows for quick identification, Side pocket with snap-down shoe compartment that expands into main case, Magnetic handle wrap closes from left or right, Elastic hideaway ID card conceals personal info. Interior window allows for quick identification

Briggs & Riley Action Duffle (Olive) $199 A great carry-on with a roomy main compartment allows duffle bag to be easily packed and organized, Mesh elastic pocket holds socks or undergarments, Shoe compartment in side pocket with snap-down expansion into main compartment, U-shaped opening allows for easy access into duffle, SpeedThru pocket for hassle-free airport security luggage checks. Orange lining alerts when pocket is open, Gusseted front pocket with a key keeper and slip pockets for tickets and magazines, Lid pocket can be used for laundry, jacket or accessories, Waterproof side pocket perfect for damp items or toiletries with exterior slip pocket for a newspaper, Zippered water bottle pocket holds beverage, Dual purpose, slip-through back pocket slides over the Outsider handle of other Baseline luggage for easy transport. Magnetic closure secures bag in place, Use webbing handles or crossways shoulder strap for easy carrying, Elastic, hide-away ID card conceals personal info. Interior window allows for quick identification, Side pocket with snap-down shoe compartment that expands into main case, Magnetic handle wrap closes from left or right, Elastic hideaway ID card conceals personal info. Interior window allows for quick identification

Briggs & Riley Convertible Cabin Bag (Black) $199 Gusseted front pocket with 2 slip pockets for magazines, a key fob and pen loops, Roomy main compartment allows tote to be easily packed and organized, Zippered mesh pocket provides additional organization for smaller items like ties and scarves, 2 elastic slip pockets are perfect for undergarments or socks, SpeedThru pocket for hassle-free airport security luggage checks. Orange lining alerts when pocket is open, Zippered water bottle pocket holds your beverage, Side shoe pocket with expansion into main compartment, Dual purpose slip-through back pocket allows bag to slide over the Outsider handle of other Baseline bags for easy transport, Magnetic closure secures bag in place, Hide-away ergonomic, padded backpack straps for comfort, Use webbing handles, shoulder strap or backpack straps for alternative carrying methods, Elastic, hide-away ID card conceals personal info

Briggs & Riley Convertible Cabin Bag (Olive) $199 Gusseted front pocket with 2 slip pockets for magazines, a key fob and pen loops, Roomy main compartment allows tote to be easily packed and organized, Zippered mesh pocket provides additional organization for smaller items like ties and scarves, 2 elastic slip pockets are perfect for undergarments or socks, SpeedThru pocket for hassle-free airport security luggage checks. Orange lining alerts when pocket is open, Zippered water bottle pocket holds your beverage, Side shoe pocket with expansion into main compartment, Dual purpose slip-through back pocket allows bag to slide over the Outsider handle of other Baseline bags for easy transport, Magnetic closure secures bag in place, Hide-away ergonomic, padded backpack straps for comfort, Use webbing handles, shoulder strap or backpack straps for alternative carrying methods, Elastic, hide-away ID card conceals personal info

Briggs & Riley Deluxe Duffle (Black) $179 Roomy main compartment allows tote to be easily packed and organized, Zippered mesh pocket provides additional organization for smaller items like ties and scarves, SpeedThru pocket for hassle-free airport security luggage checks, Orange lining alerts when pocket is open, Large U-shaped opening allows for easy access into bag, Gusseted front pocket designed to fit Briggs & Riley Compact Toiletry Kit (style 118), Features interior pocket for tickets, magazines, pens, keys, etc, Gusseted side pockets for added organization, One side features an exterior slip pocket and zippered water bottle pocket. The opposite side has a larger slip pocket for magazines, Dual purpose slip-through back pocket allows bag to slide over the Outsider handle of our other Baseline bags for easy transport, Magnetic closure secures bag in place, Use webbing handles or crossways shoulder strap for easy transport

Briggs & Riley Deluxe Duffle (Chocolate) $179 Roomy main compartment allows tote to be easily packed and organized, Zippered mesh pocket provides additional organization for smaller items like ties and scarves, SpeedThru pocket for hassle-free airport security luggage checks, Orange lining alerts when pocket is open, Large U-shaped opening allows for easy access into bag, Gusseted front pocket designed to fit Briggs & Riley Compact Toiletry Kit (style 118), Features interior pocket for tickets, magazines, pens, keys, etc, Gusseted side pockets for added organization, One side features an exterior slip pocket and zippered water bottle pocket. The opposite side has a larger slip pocket for magazines, Dual purpose slip-through back pocket allows bag to slide over the Outsider handle of our other Baseline bags for easy transport, Magnetic closure secures bag in place, Use webbing handles or crossways shoulder strap for easy transport

Briggs & Riley Deluxe Duffle (Olive) $179 Roomy main compartment allows tote to be easily packed and organized, Zippered mesh pocket provides additional organization for smaller items like ties and scarves, SpeedThru pocket for hassle-free airport security luggage checks, Orange lining alerts when pocket is open, Large U-shaped opening allows for easy access into bag, Gusseted front pocket designed to fit Briggs & Riley Compact Toiletry Kit (style 118), Features interior pocket for tickets, magazines, pens, keys, etc, Gusseted side pockets for added organization, One side features an exterior slip pocket and zippered water bottle pocket. The opposite side has a larger slip pocket for magazines, Dual purpose slip-through back pocket allows bag to slide over the Outsider handle of our other Baseline bags for easy transport, Magnetic closure secures bag in place, Use webbing handles or crossways shoulder strap for easy transport

Briggs & Riley Expandable Cabin Bag (Black) $199 Three compartment design:(a) front, (b) main and (c) flat packing, Gusseted front pocket with key fob, slip pockets for tickets, and magazines, and pen loops, Roomy main section features 2 elastic pockets for undergarments or socks, Packing section features a garment securing panel to keep clothes in place and a zippered pocket for added organization, Four inch expansion! Expandable main and flat packing sections, SpeedThru pocket for hassle-free airport security luggage checks. Orange lining alerts when pocket is open, Dual purpose slip-through back pocket allows bag to slide over the Outsider handle of other bags for easy transport, Magnetic closure secures bag in place, Use webbing handles or crossways shoulder strap for easy transport, Elastic, hide-away ID card conceals personal info. Interior window allows for quick identification

Briggs & Riley Expandable Cabin Bag (Olive) $199 Three compartment design:(a) front, (b) main and (c) flat packing, Gusseted front pocket with key fob, slip pockets for tickets, and magazines, and pen loops, Roomy main section features 2 elastic pockets for undergarments or socks, Packing section features a garment securing panel to keep clothes in place and a zippered pocket for added organization, Four inch expansion! Expandable main and flat packing sections, SpeedThru pocket for hassle-free airport security luggage checks. Orange lining alerts when pocket is open, Dual purpose slip-through back pocket allows bag to slide over the Outsider handle of other bags for easy transport, Magnetic closure secures bag in place, Use webbing handles or crossways shoulder strap for easy transport, Elastic, hide-away ID card conceals personal info. Interior window allows for quick identification

Briggs & Riley Expandable Duffle (Black) $209 Roomy main compartment allows duffle to be easily packed and organized, Zippered mesh pocket and 2 elastic pockets provide additional organization for smaller items, socks or undergarments, A carry-on with large U-shaped opening allows for easy access into bag, Gusseted front pocket is perfect for toiletries. Features a key fob and 2 slip pockets, Two 2 expandable side pockets provide added packing and organizing space, Dual purpose slip-through back pocket slides over the Outsider handle of other Baseline luggage for easy transport. Magnetic closure secures bag in place, Use webbing handles or crossways shoulder strap for convenient carrying, Elastic, hide-away ID card conceals personal info. Interior window allows for quick identification, Bottom piping guards and rubber feet protect bag’s fabric