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http://en.wikipedia.org/wiki/Neodymium_magnet

 

Τα εμπορεύματα, τα οποία προτείνουμε, προέρχονται αποκλειστικά από επιλεγμένους και αξιόπιστους εδώ και χρόνια προμηθευτές. Για να εξασφαλιστεί η υψηλή ποιότητα των μαγνητών, τα μαγνητικά χαρακτηριστικά τους υπόκεινται σε διαρκή έλεγχο. 

Η εταιρεία μας ασχολείται επίσης με το σχεδιασμό και την κατασκευή μαγνητικών διαχωριστών με μόνιμους μαγνήτες. Τα μαγνητικά χαρακτηριστικά, το εύρος λειτουργίας και οι διαστάσεις επιλέγονται μετά από ειδική συμφωνία με τον πελάτη με βάση τις συγκεκριμένες ανάγκες και απαιτήσεις του.

Η υψηλή ποιότητα σε συνδυασμό με τις ανταγωνιστικές τιμές είναι ο λόγος της αύξησης του αριθμού των πελατών μας σε όλη την Ευρώπη. Γι ΄ αυτό αποφασίστηκε να καταστεί δυνατή η γρήγορη και απλή αγορά μέσω του ηλεκτρονικού καταστήματος. Είμαστε εγγεγραμμένοι για τις ανάγκες του ενδοκοινοτικού εμπορίου και για το λόγο αυτό στους εγγεγραμμένους πελάτες από την ΕΕ, τα εμπορεύματα αποστέλλονται με προνομιακό μηδενικό συντελεστή ΦΠΑ.

Το εμπόρευμα του καταστήματός μας αποτελείται κυρίως από μαγνήτες νεοδυμίου, φερρίτη και μαγνήτες συγκράτησης σε ευρεία ποικιλία μεγεθών και σχεδίων – συνολικά πάνω από 350 προϊόντα, τα οποία παραδίδονται απευθείας από το απόθεμα.

 

  • MAGNITIZER
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    \"ΜΗΧΑΝΕΣ\"ΜΕΙΩΣΗ ΚΑΤΑΝΑΛΩΣΗΣ ΚΑΥΣΙΜΩΝ ΕΩΣ ΚΑΙ 60 % ΣΕ ΜΗΧΑΝΕΣΕΣΩΤΕΡΙΚΗΣ & ΕΞΩΤΕΡΙΚΗΣ ΚΑΥΣΗΣΜείωση κατανάλωσης σε:• Βενζίνη • Πετρέλαιο • Μαζούτ • Φυσικό αέριο • Υγραέριο
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  • ΟΙΚΟΝΟΜΙΑ ΣΤΑ ΚΑΥΣΗΜΑ ΑΠΟ 10% ΕΩΣ 50% ΙΟΝΙΣΤΗΣ - ΜΕΙΩΤΗΣ ΚΑΥΣΙΜΩΝ- ΈΩΣ 2000 CC 1 Τεμ. ΜΕΙΩΣΗ ΕΩΣ 50%
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    ΜΕΙΩΣΗ ΣΤΗΝ ΚΑΤΑΝΑΛΩΣΗ ΑΠΟ 10% ΕΩΣ 50% ΈΩΣ 2000 CC 1 Τεμ.ΒΕΝΖΙΝΗΣ-ΠΕΤΡΕΛΑΙΟΥ-ΑΕΡΙΟ ΑΜΕΡΙΚΑΝΙΚΗΣ ΤΕΧΝΟΛΟΓΙΑΣΟΙΚΟΝΟΜΙΑ ΣΤΑ ΚΑΥΣΗΜΑΕΠΑΝΑΚΤΗΣΗ ΤΗΣ ΧΑΜΕΝΗΣ ΥΠΟΔΥΝΑΜΗΣΚΑΛΥΤΕΡΗ ΚΑΥΣΗΜΗΔΕΝΙΚΟΥΣ ΡΥΠΟΥΣΛΙΓΟΤΕΡΑ ΣΕΡΒΙΣΠΡΟΣΤΑΣΤΑΣΙΑ ΜΗΧΑΝΗΣ ΛΙΓΟΤΕΡΑ ΚΑΤΑΛΟΙΠΑΔΕΝ ΣΒΗΝΕΙ ΕΥΚΟΛΑ Η ΜΗΧΑΝΗ(ΠΧ ΣΤΗΝ ΑΛΛΑΓΗ ΤΑΧΥΤΗΤΑΣ)
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  • ΟΙΚΟΝΟΜΙΑ ΑΠΟ 10% ΕΩΣ 40 % ΜΕΙΩΣΗ ΣΤΗΝ ΚΑΤΑΝΑΛΩΣΗ ΒΕΝΖΙΝΗΣ-ΠΕΤΡΕΛΑΙΟΥ-ΑΕΡΙΟΥ -ΜΑΓΝΗΤΗΣ ΜΕ 18000 GAUSS
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    ΟΙΚΟΝΟΜΙΑ ΑΠΟ 10% ΕΩΣ 40 % ΜΕΙΩΣΗ ΣΤΗΝ ΚΑΤΑΝΑΛΩΣΗ ΒΕΝΖΙΝΗΣ-ΠΕΤΡΕΛΑΙΟΥ-ΑΕΡΙΟΥΜΑΓΝΗΤΗΣ ΜΕ 18000 GAUSSΟΙΚΟΝΟΜΙΑ ΣΤΑ ΚΑΥΣΗΜΑΕΠΑΝΑΚΤΗΣΗ ΤΗΣ ΧΑΜΕΝΗΣ ΥΠΟΔΥΝΑΜΗΣΚΑΛΥΤΕΡΗ ΚΑΥΣΗΜΗΔΕΝΙΚΟΥΣ ΡΥΠΟΥΣΛΙΓΟΤΕΡΑ ΣΕΡΒΙΣΔΕΝ ΣΒΗΝΕΙ ΕΥΚΟΛΑ Η ΜΗΧΑΝΗ(ΠΧ ΣΤΗΝ ΑΛΛΑΓΗ ΤΑΧΥΤΗΤΑΣ)ΠΡΟΣΤΑΣΙΑ ΜΗΧΑΝΗΣ ΛΙΓΟΤΕΡΑ ΚΑΤΑΛΟΙΠΑ
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  • ΜΑΓΝΗΤΗΣ ΝΕΟΔΥΜΙΟΥ D70 x 30 / N38 - NdFeB (neodymium) magnet ΔΥΝΑΜΗ ΕΛΞΗΣ 100 ΚΙΛΑ
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    D70 x 30 / N38 - NdFeB (neodymium) magnet είδος του υλικού:(όσο υψηλότερη είναι η περιεκτικότητα σε σίδηρο στον χάλυβα, οι καλύτερες μαγνητικές ιδιότητες) ΔΥΝΑΜΗ ΕΛΞΗΣ 100 ΚΙΛΑ
    Τιμή: 0.00 €
  • ΜΑΓΝΗΤΗΣ ΝΕΟΔΥΜΙΟΥ D55 x 25 / N35 - NdFeB (neodymium) magnet ΔΥΝΑΜΗ ΕΛΞΗΣ 70 ΚΙΛΑ
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    D55 x 25 / N35 - NdFeB (neodymium) magnet είδος του υλικού:(όσο υψηλότερη είναι η περιεκτικότητα σε σίδηρο στον χάλυβα, οι καλύτερες μαγνητικές ιδιότητες) ΔΥΝΑΜΗ ΕΛΞΗΣ 70 ΚΙΛΑ
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  • ΜΑΓΝΗΤΗΣ ΝΕΟΔΥΜΙΟΥ D33 x 30 / N42 - νεοδυμίου (νεοδύμιο) μαγνήτης ΔΥΝΑΜΗ ΕΛΞΗΣ 55 ΚΙΛΑ
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    ΜΑΓΝΗΤΗΣ ΝΕΟΔΥΜΙΟΥ D33 x 30 / N42 - νεοδυμίου (νεοδύμιο) μαγνήτης ΔΥΝΑΜΗ ΕΛΞΗΣ 55 ΚΙΛΑ
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  • ΜΑΓΝΗΤΗΣ ΝΕΟΔΥΜΙΟΥ ΚΥΛΙΝΔΡΙΚΟΣ D70 x 20 / N38 - νεοδυμίου (νεοδύμιο) μαγνήτης ΔΥΝΑΜΗ ΕΛΞΗΣ 75 ΚΙΛΑ
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    ΜΑΓΝΗΤΗΣ ΝΕΟΔΥΜΙΟΥ ΚΥΛΙΝΔΡΙΚΟΣ D70 x 20 / N38 - νεοδυμίου (νεοδύμιο) μαγνήτης ΔΥΝΑΜΗ ΕΛΞΗΣ 75 ΚΙΛΑ
    Τιμή: 0.00 €
  • ΜΑΓΝΗΤΗΣ ΜΕ ΞΥΛΙΝΗ λαβή 80x80x32 / Ν (neodymium) Διαστάσεις: 80 x 80 x 32 χιλιοστά μετρικό σπείρωμα: M10 δύναμη έλξης: max. 115 κιλά στέγαση: οξύ-απόδειξη χάλυβα
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    ΜΑΓΝΗΤΗΣ ΜΕ ΞΥΛΙΝΗ ΛΑΒΗ 80x80x32 / Ν (neodymium) Διαστάσεις: 80 x 80 x 32 χιλιοστάμετρικό σπείρωμα: M10δύναμη έλξης: max. 115 κιλάστέγαση: οξύ-απόδειξη χάλυβα
    Τιμή: 0.00 €
  • ΜΑΓΝΗΤΗ ΜΕ ΛΑΒΗ (αδιάβροχο) 167 x 87 x 65/430 / N Διαστάσεις: 167 x 87 x 65 χιλιοστά δύναμη έλξης: max. 400 κιλά στέγαση: οξύ-απόδειξη χάλυβα (αδιάβροχο)
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    Κρατώντας μαγνήτη (αδιάβροχο) 167 x 87 x 65/430 / N Διαστάσεις: 167 x 87 x 65 χιλιοστάδύναμη έλξης: max. 400 κιλάστέγαση: οξύ-απόδειξη χάλυβα (αδιάβροχο)
    Τιμή: 0.00 €
  • Η κατοχή του μαγνήτη (αδιάβροχο) 51 x 47/90 / N ΔΥΝΑΜΗ ΕΛΞΗΣ 30 ΚΙΛΑ
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    Η κατοχή του μαγνήτη (αδιάβροχο) 51 x 47/90 / NΔιαστάσεις: 51 x 47 ΔΥΝΑΜΗ ΕΛΞΗΣ 30 ΚΙΛΑ χιλιοστάδύναμη έλξης: max. 30 κιλάστέγαση: οξύ-απόδειξη χάλυβα (αδιάβροχο)
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  • Neodymium Magnets The most powerful magnets available Neodymium is a class of Rare Earth material, available in both sintered and bonded forms. Major characteristics: the most powerful (highest energy product) class of magnet material commercially avail
     Neodymium Magnets The most powerful magnets available  Neodymium is a class of Rare Earth material, available in both sintered and bonded forms. Major characteristics: the most powerful (highest energy product) class of magnet material commercially avail
    Neodymium MagnetsThe most powerful magnets availableNeodymium is a class of Rare Earth material, available in both sintered and bonded forms. Major characteristics: the most powerful (highest energy product) class of magnet material commercially available today.Quick Tips Magnetic Strength: The most powerful commercially produced magnets. Grades Available: Grades 35, 40, 42, and 45 are commonly available. (These numbers are an indicator of the strength of the magnet.) The highest grades available are in the 55 range. Physical Strength: Hard and fairly brittle - can chip or break if dropped or if they snap together. How they behave with temperature: Should not be used above 130° C (240° F) without careful magnetic circuit design. Magnet surface: Neodymium magnets that are not protected with a surface coating (such as plating) may rust in humid conditions. Relative cost: Neodymium magnets are a little more costly than the ceramic types, but pack a much stronger punch. Care tips: Take care when handling these magnets - especially larger magnets. They are very strong and can snap together or to a steel surface with a strong force! Be careful not to pinch your finger between magnets. Assembly tips: Neodymium magnets are often assembled into products using "superglues" such as Loctite 325. Always ensure that bonding surfaces are clean and dry prior to bonding.
  • Neodymium Magnet Safety The neodymium magnets we sell are extremely strong. They must be handled with care to avoid personal injury or damage to the magnets. Powerful attraction forces can cause serious injury. Neodymium magnets are more powerful than
     Neodymium Magnet Safety  The neodymium magnets we sell are extremely strong.  They must be handled with care to avoid personal injury or damage to the magnets. Powerful attraction forces can cause serious injury.  Neodymium magnets are more powerful than
    Neodymium Magnet SafetyThe neodymium magnets we sell are extremely strong. They must be handled with care to avoid personal injury or damage to the magnets.Powerful attraction forces can cause serious injury.Neodymium magnets are more powerful than other kinds of magnets. The incredibly powerful force between magnets can often be surprising to those unfamiliar with their strength.Fingers and other body parts can be pinched between two magnets. With larger magnets, injuries of this type can be severe.Neodymium magnets are not for children.Neodymium magnets are not toys. Children should not be allowed to handle neodymium magnets. Small magnets can pose a choking hazard. If multiple magnets are swallowed, they can attach to one another through intestine walls. This can cause a severe health risk, requiring immediate, emergency surgery if correctly diagnosed.Neodymium magnets can affect pacemakers.The strong magnetic fields near a neodymium magnet can affect pacemakers, ICDs and other implanted medical devices. Many of these devices are made with a feature that deactivates it with a magnetic field. Therefore, care must be taken to avoid inadvertently deactivating such devices.Neodymium magnets are brittle and fragile.Neodymium magnets are made of a hard, brittle material. Despite being made of metal, and the shiny, metallic appearance of their nickel plating, they are not as durable as steel.Neodymium magnets can peel, chip, crack or shatter if allowed to slam together. Eye protection should be worn when handling magnets, since shattering magnets can launch small pieces at great speeds.Neodymium magnets are not easily drilled or machined.Magnets can affect magnetic media.The strong magnetic fields near neodymium magnets can damage magnetic media such as floppy disks, credit cards, magnetic I.D. cards, cassette tapes, video tapes or other such devices. They can also damage televisions, VCRs, computer monitors and CRT displays. Avoid placing neodymium magnets near electronic appliances.Neodymium magnets can become demagnetized at high temperatures.While operating temperatures are often listed as 80°C (175°F), the actual maximum operating temperature of a magnet can vary depend on the grade, magnet shape and how it is used.Neodymium magnet powder or dust is flammable.Avoid drilling or machining neodymium magnets. When ground into a dust or powder, this material is highly flammable.Those with nickel allergies should avoid prolonged contact with magnets.A small percentage of people have a nickel allergy, where an allergic reaction can cause redness and a skin rash. Those with nickel allergies should avoid directly handling nickel plated neodymium magnets.Strong magnetic fields can interfere with compasses and navigation.IATA (International Air Transport Association) and US Federal rules and regulations cover shipping magnets by air and ground delivery. Magnetic fields can influence compasses or magnetometers used in air transport. They can also affect internal compasses of smartphone and GPS devices.Neodymium magnets can corrode.Neodymium magnets can rust or corrode in the presence of moisture. While the three layer, nickel-copper-nickel plating on most of our magnets provides enough protection for many applications, they are not waterproof. If used underwater, outdoors or in a moist environment, they can corrode and lose magnetic strength.
  • Magnet Grades Neodymium magnets come in different grades such as N42, N52 or N42SH. What do these numbers mean? How does the grade relate to the strength of a magnet? Does a magnet have a Gauss number? What are Magnet Grades? A magnet grade is a goo
     Magnet Grades  Neodymium magnets come in different grades such as N42, N52 or N42SH.  What do these numbers mean?  How does the grade relate to the strength of a magnet?  Does a magnet have a Gauss number? What are Magnet Grades?  A magnet grade is a goo
    Magnet GradesNeodymium magnets come in different grades such as N42, N52 or N42SH. What do these numbers mean? How does the grade relate to the strength of a magnet? Does a magnet have a Gauss number?What are Magnet Grades?A magnet grade is a good measure of the strength of a magnet. In general, higher numbers indicate a stronger magnet.The number comes from an actual material property, the Maximum Energy Product of the magnet material, expressed in MGOe (Mega Gauss Oersteds). It represents the strongest point on the magnet’s Demagnetization Curve, or BH Curve.The pull force from a magnet varies with the grade or N number. Double the N number and you’ll find roughly double the pull force. How do you measure the strength of a magnet?It depends on what is meant by strength. Two common measures of a magnet’s strength are the pull force and the strength of the magnetic field.Pull force is how much force you have to pull on a magnet to move it away from something, such as a steel surface or another magnet. We show this force in pounds on our site, though you could also express it in Newtons, or even kilograms. The specific way the magnet is tested can have a huge influence on the measured strength.We show several different measures of strength, as described in our Pull Force FAQ answer. The number we use most is Pull Force, Case 1. It is the force required to pull a magnet directly away from a steel surface. It is a great reference for magnet strength, expressed as a single number. Even if your application doesn’t pull on the magnet in the same way, this is often a good number to use to compare the strength of different magnets.Interestingly, the pull force between two magnets that are touching (which we call Case 3 in our online calculators) is equal to Pull Force, Case 1.The magnetic field strength is a measurement of the magnetic field’s strength and direction at a particular point near the magnet. It is expressed in Gauss or Tesla (1 Tesla = 10,000 Gauss). It depends on the size, shape and grade of the magnet, where the measurement is performed, and the presence of any other magnets or ferromagnetic materials nearby. Our Surface Fields article is a good place to learn more about this.This is the important number when using magnets to activate a reed switch or Hall effect sensor.What Grade Should I Choose?It depends on the application. If you need the highest strength in the smallest possible package at room temperature, grade N52 is the strongest available.Many of our magnets are offered in grade N42, which is a great balance between cost, strength and performance at higher operating temperatures. You can get the same strength as an N52 magnet by using a slightly larger N42 magnet.If you have slightly elevated temperatures, in the 140°F to 176°F range (60°C -80°C), N42 magnets might actually be stronger than N52. This is especially true if your magnet shape is very thin. See our detailed article on Temperature and Neodymium Magnets for more details.For even higher temperatures, consider some of our High Temp Magnets, offered in the N42SH grade. For a complete list of available grades, see our Specs page.How many Gauss is a magnet?We’re often asked if a magnet “has 10,000 Gauss.” This is a bit of a strange question, since Gauss is a unit of magnetism that can apply to different measurements or magnet properties. A magnet doesn't have one specific amount of Gauss in it. Two common measurements expressed in Gauss are The Residual Flux Density, Br, and the Surface Field.Residual Flux Density, Br, is the magnetic induction remaining in a saturated magnetic material after the magnetizing field has been removed. Scroll down to the last section of this article for a more detailed explanation.This number is a material property which is independent of the magnet shape. Grade N42 magnets have a Br of 13,200 Gauss, while N52 magnets can be as high as 14,800 Gauss. See our Specs page for more Br values for various neodymium magnet grades.The Surface Field is the strength of the magnetic field measured right at the surface of the magnet. It’s the field strength you might measure if you could squish a magnetometer’s sensor right up against the surface. This number depends on the magnet material, the shape of the magnet and how it’s used in a magnetic circuit.How Do Neodymium Magnet Grades Compare to Other Magnet Types?Magnet Type Max Energy Product (MGOe)Neodymium 35-52SmCo 26 26Alnico 5/8 5.4Ceramic 3.4Flexible 0.6-1.2Neodymium magnets are by far the strongest type of permanent magnet available. Magnet advancements are a history of increasing coercivity. Neodymium magnets are both stronger and less apt to be demagnetized than other magnet types.Where do these N numbers come from?Demagnetization curves for various magnet types at 20CThe performance of a magnet material is defined by that material’s hysteresis curve, also known as a Demagnetization Curve or BH Curve. The Maximum Energy Product is the point on this curve where the B value multiplied by the H value is at its maximum.At a point on the curve, multiply the "B" value (in kilo Gauss) by the "H" value (in kilo Oersted) to get the Maximum Energy Product (in Mega Gauss Oersted, or MGOe). For example, grade N42 has a Max Energy Product of 42 MGOe.Magnets with a bigger Maximum Energy Product will have greater strength. Specifically, the shape of the BH Curve indicates both how strong a magnet is and how strong of a magnetic field you would need to demagnetize the magnet. Appendix: What is a BH Curve? (WARNING: Technical Content Follows)A BH Curve describes the magnetic properties of the magnetic material. Let’s examine one step by step.Consider a neodymium magnet sitting inside a magnetizer. The magnetizer is essentially a coil of wire wrapped around the magnet, through which we will apply a very strong current to create a magnetic field.In the graph at right, the horizontal axis shows the strength of the Applied magnetic field (H) – the one we get by running current through the wire. The vertical axis shows the Induced field (B), which the permanent magnet creates by itself. around the magnet, through which we will apply a very strong current to create a magnetic field.The magnet we will start with has just been manufactured, but not yet magnetized. The magnetic field it creates is zero (B). There is no current running through the wire, so the applied field (H) is also zero. Let’s represent this point with a dot at the zero location on the graph, point #1.Now, let’s briefly run a terrifically strong current through the wire, placing the magnet in a uniform magnetic field. Keep increasing the current, and the applied field increases. If we measure the magnetic field, we also see an induced magnetic field, made from the magnet.At point #2, the increases level off. At point #2, we still have a current running through the wire producing an Applied field, plus an Induced field from the magnet.Now, let’s turn the current off. The Applied field (H) drops to zero, but there remains a magnetic field produced by the magnet, shown as point #3. This point is also called Br, Br max, the Residual Induction or the Residual Flux Density.In our Glossary, we define Br as, “the magnetic induction remaining in a saturated magnetic material after the magnetizing field has been removed.” That's at point #3.If we apply a current in the opposite direction, the magnetic field created by the current in the coil of wire opposes the field from the magnet -- it is in the opposite direction.By applying progressively more current in this direction, we can find the shape of the normal curve in the second quadrant (the upper left hand quarter) of the BH Curve graph. Where the Induced field reaches zero, at point #4, is called the Coercive force, Hc. This is the magnet's Coercivity: the measure of the magnet’s resistance to demagnetization by an external magnetic field.The farther left on the graph this point is located, the stronger the magnetic field you need to demagnetize the magnet. Not only are neodymium magnets strong, but they have the highest coercivity values of all permanent magnet types.The rest of the graph follows a symmetric form. The whole shape of this graph is the hysteresis curve, and defines how a particular magnet material behaves. It is a property of the magnet material.When considering the performance of an already magnetized magnet in an application, we only need to look at the 2nd quadrant (the upper left quarter of the graph) to see how it will behave.The shape of the curve shows how the magnet works in actual applications. The actual operating point on the graph depends on the shape of the magnet and how it is used in a magnetic circuit (its Permeance Coefficient). For some examples of how to use this information and to find the actual operating point on this curve, see our article on Temperature and Neodymium Magnets.
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