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Zen Magnets are small but curiously strong rare earth super-magnets, 5mm ± 0.01mm in diameter. 8 Times more powerful than the ceramic magnets driving your speakers. 30 Times more powerful than the average fridge magnet. Ultra high tolerance offers unparalleled formation rigidity and consistency of use. Super Strong Small Neodymium Rare Earth Disc Magnets - Industrial, DIY, Crafts. Strong Small Magnets - Sets of 6 10 12 24 - Tiny Magnets - Neodyminum Rare Earth Round Disc Magnets for Metal Sign, Craft or Fridge - 8x3 mm MinntanaMetal. 5 out of 5 stars (37) $ 7.00 FREE shipping Only 3 available and it's in 8 people's carts. Favorite Add to 10mm x 1mm - 3/8 x 1/32 inches - Grade N52 Strong Thin Disc Rare Earth NdFeB. Neodymium Rare Earth Magnets and Samarium Cobalt Magnets all can be made to tiny magnets. The precision of dimensions can reach 0.0002″. We provide the macro magnets per customer’s drawing. Tiny Magnets are also called Micro Precision Magnets, Miniature Magnets, Minitype Magnets, Mini-sized Magnets. NEXLEVL Super Mini Fridge Magnets 1/4' x 1/16', 25 Very Tiny Round Craft Magnets, Perfect Small Refrigerator Magnet, Crafts, DIY Projects, Magnetic Whiteboards, Stronger Than The Silver Magnets 4.6 out of 5 stars 896.
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Browse the largest stock of rare earth, ceramic, alnico, flexible strip, flexible sheet, or electromagnets that can be shipped worldwide. If you don’t find what you’re looking for, we can custom design and manufacture specialty magnets for any application, with a fast turnaround time.
For the past 3 decades, Jobmaster Magnets has been the supplier of choice for magnets used in the following industries: manufacturing, automotive assembly, food processing, robotics, plastics, and alternative energy solutions
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Our manufacturing facility is set up for the most efficient process- minimizing turnaround time and enabling us to meet your tightest deadlines.
We stock a wide range of rare earth magnets for all uses. Select from neodymium or samarium permanent magnets- the most powerful magnetic materials available. Ceramic, a corrosion resistant material, is the most popular material choice for most applications. Choose from a variety of shapes and sizes- round, square and bar, as small as a ¼ inch and as large as 6 inches, or request your custom requirements. Alnico, composed of aluminum, nickel and cobalt, is well known for its temperature stability and is very reliable in high temperature applications. Choose from cylindrical, bar, and disc shaped options.
Our flexible strip and flexible sheet options allow you to choose from dozens of stock specifications, or request a custom design for your unique application of flexible magnetic sheets or strips. These are commonly used in displays and signage.
For more heavy-duty requirements, we stock electromagnets that can pull as much as 1100 lbs (and can custom manufacture for even greater strength). Or for mounting and holding applications, you can select from a wide range of channel magnets, from tiny to large, to cover your range of uses.
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View our large inventory, including everything from large permanent magnets to tiny magnets, and order today for fast shipping.
Magnetic resonance imaging (MRI) is a type of scan that uses strong magnetic fields and radio waves to produce detailed images of the inside of the body.
An MRI scanner is a large tube that contains powerful magnets. You lie inside the tube during the scan.
An MRI scan can be used to examine almost any part of the body, including the:
- brain and spinal cord
- bones and joints
- breasts
- heart and blood vessels
- internal organs, such as the liver, womb or prostate gland
The results of an MRI scan can be used to help diagnose conditions, plan treatments and assess how effective previous treatment has been.
Read a guide to NHS waiting times.
What happens during an MRI scan?
During an MRI scan, you lie on a flat bed that's moved into the scanner. Depending on the part of your body being scanned, you'll be moved into the scanner either head first or feet first.
The MRI scanner is operated by a radiographer, who is trained in carrying out imaging investigations. They control the scanner using a computer, which is in a different room, to keep it away from the magnetic field generated by the scanner.
You'll be able to talk to the radiographer through an intercom and they'll be able to see you on a television monitor throughout the scan.
At certain times during the scan, the scanner will make loud tapping noises. This is the electric current in the scanner coils being turned on and off. You'll be given earplugs or headphones to wear.
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It's very important to keep as still as possible during your MRI scan. The scan lasts 15 to 90 minutes, depending on the size of the area being scanned and how many images are taken.
Read more about how an MRI scan is performed.
How does an MRI scan work?
Most of the human body is made up of water molecules, which consist of hydrogen and oxygen atoms. At the centre of each hydrogen atom is an even smaller particle, called a proton. Protons are like tiny magnets and are very sensitive to magnetic fields.
When you lie under the powerful scanner magnets, the protons in your body line up in the same direction, in the same way that a magnet can pull the needle of a compass.
Short bursts of radio waves are then sent to certain areas of the body, knocking the protons out of alignment. When the radio waves are turned off, the protons realign. This sends out radio signals, which are picked up by receivers.
These signals provide information about the exact location of the protons in the body. They also help to distinguish between the various types of tissue in the body, because the protons in different types of tissue realign at different speeds and produce distinct signals.
In the same way that millions of pixels on a computer screen can create complex pictures, the signals from the millions of protons in the body are combined to create a detailed image of the inside of the body.
Safety
An MRI scan is a painless and safe procedure. You may find it uncomfortable if you have claustrophobia, but most people find this manageable with support from the radiographer. Going into the scanner feet first may be easier, although this is not always possible.
MRI scans don't involve exposing the body to X-ray radiation. This means people who may be particularly vulnerable to the effects of radiation, such as pregnant women and babies, can use them if necessary.
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However, not everyone can have an MRI scan. For example, they're not always possible for people who have certain types of implants fitted, such as a pacemaker (a battery-operated device that helps to control an irregular heartbeat).
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Extensive research has been carried out into whether the magnetic fields and radio waves used during MRI scans could pose a risk to the human body. No evidence has been found to suggest there's a risk, which means MRI scans are one of the safest medical procedures currently available.
Read more about who can and can't have an MRI scan.