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Ringmagnet Ø 20.0 x 4.5 x 4.0 mm N42 nickel with counterbore south

Product information "Ringmagnet Ø 20.0 x 4.5 x 4.0 mm N42 nickel with counterbore south"

This ring magnet with a 90 ° counterbore made of neodymium can be screwed on securely with a countersunk screw. The 4.5 mm hole is designed for a screw with a diameter of 4 mm.
 
The south pole of this magnet is on the depression side.

Note: You cannot use two of these magnets in pairs, i.e. the magnets do not stick to one another with the countersunk side, but repel each other.
To use this magnet type in pairs, you need the following magnet as a counter magnet:
 
If this magnet should only stick to metal, the direction of magnetization / polarity is irrelevant.
 
Note: If too much force is applied, neodymium magnets can break. We recommend a maximum tightening torque of 2 Nm when screwing on this magnet.

Technical specifications

Adhesive force: 5 kg
Bore depth: 1,6 mm
Coating: Nickel (Ni-Cu-Ni)
Diameter: 20 mm
Height H: 4 mm
Lower diameter: 9,1 mm
Magnetization direction: axial (parallel to height)
Magnetization quality: N42
Material: Neodymium
Maximum temperature: 80 °C
Superior diameter: 4,5 mm
Tolerance: +/- 0,1 mm
Weight: 9,5 g

Technical specifications for magnetization grade N42

Material Remanence Coercivity Energy product Maximum temperature
  Br bHc iHc (BxH)max  
  Gauss (G) Tesla (T) typ. kOe kA/m kOe kA/m MGOe kJ/m 3  
N42 12900-13200 1.29-1.32 10.8-12.0 860-955 ≥  12 ≥ 955 40-42 318-334 ≤  80

The product conforms to the European RoHS Community legislation

The product conforms to the European RoHS Community legislation (2002/95/EC - RoHS - Restriction of Hazardous Substances) relating to the use and the employment of certain hazardous substances in electrical and electronic devices.

Safety Notice

NdFeB magnets are hard and brittle. Especially with thinner dimensions / higher adhesive forces, these can easily break or splinter! An uncontrolled impact of two magnets as well as an external, mechanical shock or pressure load should therefore be avoided!

Determination of the magnetic force

The adhesive force of our magnets is determined at room temperature on a polished plate made of steel S235JR (ST37) with a thickness of 10 mm by the vertical withdrawal of the magnet (1kg ~ 10 N). A different value down to -10% compared to the specified value is possible in exceptional cases. In general, the value is exceeded. Please note that for thinner, painted and not absolute plan undergrounds the adhesive force represents only one raction of the specified values.

10 of 37 reviews

Average rating of 4.9 out of 5 stars


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14 November 2018 08:32

Review with rating of 5 out of 5 stars

Runde Sache... und dazu ziemlich stark.

8 October 2015 10:02

Review with rating of 5 out of 5 stars

Hält gut:)

28 June 2017 15:24

Review with rating of 5 out of 5 stars

Sehr schnelle Lieferung

6 October 2017 17:02

Review with rating of 5 out of 5 stars

Fliegenfenster Holzrahmenbefestigung

21 December 2017 13:04

Review with rating of 5 out of 5 stars

zu Hause

27 January 2018 21:18

Review with rating of 5 out of 5 stars

Alles Gut

12 February 2018 06:42

Review with rating of 5 out of 5 stars

Für meine Musterplatten

5 September 2018 15:01

Review with rating of 5 out of 5 stars

sehr praktisch zum Anschrauben für diverse Verbindungen im Rahmen der Bühnenausstattung. Gute Haftung.

9 October 2018 11:39

Review with rating of 5 out of 5 stars

Fixierung einer Konsole

12 December 2019 06:19

Review with rating of 5 out of 5 stars

Die Magnete übertreffen meine Erwartungen. Einfach TOP!

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