NdFeB block and bar magnets are the most widely used neodymium magnet geometry, available from small sensor blocks of a few millimetres up to large holding blocks for separators and lifting applications. Blocks are sintered, cut or ground to dimension and are typically magnetized across the thickness.
We supply blocks with chamfered or countersunk holes for fastening, stepped configurations and multi-block arrays. Dimensional tolerance is ±0.05 mm standard, with tight ±0.02 mm available for precision assemblies.
Key Specifications
| Specification | Value |
|---|---|
| Grades | N30–N52 incl. M/H/SH/UH/EH |
| Sizes | From 2×2×1 mm to 150×100×25 mm typical |
| Tolerance | ±0.05 mm standard, ±0.02 mm precision |
| Holes | Plain, countersunk or threaded on request |
| Magnetization | Through thickness (axial) or across length |
| Coatings | Ni, Zn, epoxy, NiCuNi, Parylene |
All magnets are produced to order. Please provide grade, dimension (or drawing), magnetization direction, coating and quantity for quotation. Email sales@polemagnet.com or use the inquiry form — we reply within 24 hours.
FAQ
Custom NdFeB Block & Bar Magnets — FAQ
How do you magnetize block magnets?
Standard blocks are axially magnetized through the thickness. Where application requires, we can magnetize along the length or width. Specify the magnetized face and orientation on your drawing.
Can you add countersunk or threaded holes?
Yes. Plain through-holes, countersunk holes for countersunk screws and threaded holes can be machined. Note that each hole reduces the available magnetic surface and holding force.
Do you provide free samples for testing?
Yes, sample orders are welcome. Send your drawing or specification together with the intended application so our engineers can recommend the correct grade, magnetization direction and coating before we prepare samples.
Can the factory produce to my drawing with special tolerances?
Yes. We machine, grind and inspect to customer drawing tolerances. For sintered NdFeB the standard machining tolerance is ±0.05 mm and can be tightened to ±0.02 mm with diamond grinding where the geometry allows.
Need Custom Magnets for Your Project?
Send your drawing, grade, magnetization direction and quantity. Our engineers will reply with a quotation within 24 hours.