1.5mm N40 / N42 Neodymium Block Magnets for Speakers / Earphones

Sintered NdFeB magnet

Strong permanent magnet with magnetic properties

Grades

N33, N35, N38, N40, N42, N45, N48, N50, N52, (M, H, SH, EH, UH )

Coatings

Nickel, Ni-Cu-Ni, Zinc, white-blue Zn, Black epoxy resin, Gold

Sizes

customized

Shapes

Disc, cylinder, sphere, block, ring, tile, arc, and other irregular shapes

Tolerance

+/-0.05mm unless specified. 
 

Magnetized direction

Through thickness, diameter, axial, etc

Maximum working temperature

80 to 120 degrees C

Delivery time

Within 7-30 days when order /confirm/ied

Package Condition

Standard air/sea protective package, unless specified.

Grade:

N35-N52 Max.     Working Temperature 80 °C

33M-48M Max.    Working Temperature 100 °C

33H-48H Max.     Working Temperature 120 °C

30SH-45SH Max.  Working Temperature 150 °C

30UH-40UH Max.  Working Temperature 180 °C

28EH-38EH Max.  Working Temperature 200 °C

                              Coating and Corrosive Resistance of Sintered NdFeB

Surface

Coating

colour

Thickness
(um)

Resistance can be

Corrosive 
Resistance

PCT 
Test

Salt Spray Test

Nickel

Ni/NiCuNi

Silver

10-20

48h/72h

72h

excellent