China Rare Earth Magnet Limited manufactures neodymium magnets into a variety of shapes. Block magnets are very common. Some customers call it rectangular or square or cube magnets. 
How to enquire and order NdFeB block permanent magnets?
The following information is necessary to be provided when making enquiries and placing order.
1. Size: length x width x height, L x W x T (through hole D) and etc.
Tolerances: allowed variation range in dimensions, ±0.1mm, 0/-0.2mm, +0.1/-0.25mm and etc.
2. Neodymium Magnet Grade: N35~N52, N30M~N50M, N30H~N48H, N30SH~N45SH, N28UH~N40UH, N28EH~N38EH and N28AH~N35AH
3. Magnetization orientation: magnets to be supplied in magnetized or un-magnetized condition?
The orientation is across thickness or width or length? Multi-poles magnetized?
4. Coating: NiCuNi triple layer, black epoxy, grey epoxy, Zn, Ni-Au, Ni-Ag or others
5. Quantity: trial order qty / bulk order qty / monthly order qty/ annual qty
6. Conditions and application of magnet (optional): maximum temperature, humidity, outside, inside, etc.
7. Delivery Term (optional)
Remark: For very big neodymium magnets, we always suggest sea transportation, because it is difficult to shield the magnetism, magnetism cannot be totally shielded.
Some variant types of Block like through hole, countersunk hole, curved surface, Trapezoid
We supplied custom made variant types of neodymium block magnets for our customers.
If you are looking for same or similar shapes of permanent magnets, please contact us and provide the drawing and specifications of the magnets desired.
-Block magnet with one or more through hole or countersink hole
-Block magnet with curved surface
-Block magnet with bevel
-Trapezoid magnet
-Other Special Shapes
Mini or Big Blocks
China Rare Earth Magnet Limited customizes block magnets in various sizes, like neodymium mini magnets 0.5x0.5x0.5mm, 0.2x0.2x0.2mm, big magnets 100x50x50mm, 120x120x20mm, 150x100x20mm, 2"x2"x2", 200x60x10mm, etc.
Here is a small portion of rectangular magnet dimensions we customized for reference
Strong and large block permanent magnets
For example:
100x100x30mm/N52/Ni-Cu-Ni/Magnetized through Thickness 30mm
100x20x26mm/N52/Ni-Cu-Ni/Magnetized through Width 26mm
150x100x25mm/N38/Ni-Cu-Ni/Magnetized through Thickness 25mm
150x50x20mm/N35/Zn+Epoxy/Magnetized through Thickness 20mm
Block magnets with curved top face
For example:
R80x70x30x10mm/N35UH/Ni-Cu-Ni/Magnetized through Thickness 10mm
Square magnets with through hole
For example:
2"x2"x2"xd10mm/N50M/Black epoxy/Magnetized through Thickness 2"
50x30x15xd8mm/N48/Black epoxy/Magnetized through Thickness 15mm
Tiny magnets & thin magnets
For example:
5x5x0.4mm/N40/Zinc/Magnetized through Thickness 0.4mm
3x3x0.2mm/N42/Zinc/Magnetized through Thickness 0.2mm
2x2x1mm/N50/Nickel/Magnetized through Thickness 1mm
30x20x1mm/N42/Ni-Cu-Ni/Magnetized through Thickness 1mm
Permanent Magnet Bars
For example:
110x11x6mm/N35/Ni-Cu-Ni/Magnetized through Thickness 7mm
100x5x3mm/N35/Ni-Cu-Ni/ Magnetized through Thickness 3mm
