25x4mm N38 sintered round magnet MOQ:2000pcs

25x4mm N38 sintered round magnet MOQ:2000pcs

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25x4mm N38 sintered round magnet MOQ:2000pcs

Super Neodymium Magnet Made of neodymium, the most powerful magnet material in the world. Super magnets are great for projects that require extreme strength in a small size. Magnets are brittle and can chip if dropped.

Specification:

 China Manufacturer Disc Shaped Large Super High Grade Rare Earth Permanent Ndfeb Magnet.

disc magnet (2)magnetization side

Place of origin China
Item ID S20005N
Material NdFeB
Shape Disc
Diameter 25mm
Thickness 4mm
Tolerance ±0.03mm for diamater   /thickness, ±0.1mm for width/ length
Direction of magnetisation axial (parallel to height)
Coating Nickel-plated (Ni-Cu-Ni),can be Customised  Gold, Silver, Copper, Epoxy, Chrome, etc)
Grade Customized  N35 N38 N40 N42 N45 N48 N50 N52 ……
Max. Working Temperature Grade Max. Operating Temperatures
N35-N52 80°C (176°F)
33M- 48M 100°C (212°F)
33H-48H 120°C (248°F)
30SH-45SH 150°C (302°F)
30UH-40UH 180°C (356°F)
28EH-38EH 200°C (392°F)
28AH-35AH 220°C (428°F


Product show:

ndfeb magnet (18)

ndfeb magnet (22)

ndfeb magnet (20)

Coating for your convenience:

Neodymium magnet are composed mainly of neodymiun, iron and boron.if that are not plated, the iron in the material will oxidize very easily, particularly is exposed to moisture. Even normal humidity will rust any iron anywhere over time.

Nickel is the most common choice, as it is durable and cost-effective.Our magnets are costed with a triple plating of nickle-copper-nickle.This created a shiny siliver finish and provides dependable resistance to corrosion in most applications. It is important to remember that no neodymium magnet,even with a plastic or gold coating, is completely waterproof.

Coating

Surface color

Application

Coating thickness

Salt spray Test

Zn

Blue white colorful

Have a high anticorrosion ability

5-10um

>24hr

NicuNi

Slivery grey;Black

Applicable to a more harsh environment

15-30um

>48hr

Black Epoxy

Black

Toy, Insulation machinery, Applicable to a more harsh environment

15-30um

>300hr

Glod

Glod

Decorative, health-care, precision instruments ect

5-10um

>24hr

Machining Equipment:

For the next 25 years Jintong was one of the leading neodymium magnet  manufacturers and shipped an average of 1 to 2 tons of finished neodymium magnetic material per month. We are constantly striving to add complimentary functions in order to consistently deliver value to the market place.

Configure high-end detection equipment The development of proprietary cutting technology, advanced precision machinetight production process control allowed Jintong to remain at the forefront of neodymium magnet manufacturers.

1.Average force meter( Milling particle size inspection)

2.Magnetization characteristic automatic measuring instrument( Issuedemagnetization curve)

3.Magnetic testing equipment for measurements of Field Density and Field Strength

4.Hysteresisgraph for magnetic characteristic measuremen ect

Jintong Factory

Certification:

certifications

Warning: Not for children.


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