Buyers often open with a request for a strong magnet, and the word strong hides at least three different questions: how much force is needed, at what temperature, and in what geometry. This guide separates those questions, because the published pages on this site answer them in different places, and no single page answers all three at once. Strength is not a published figure on this site: no pull-force table, no flux figure and no curve value is quoted here, because none was transcribed from the company's pages as a per-product figure.
Strength is not one number
A magnet's useful effect depends on its material, its grade series, its shape and size, its magnetization direction, the distance to the part it acts on, and the temperature it operates at. Change any one of those and the effect changes, even if the magnet's name stays the same. That is why a request for the strongest magnet cannot be answered without a geometry and an operating condition: the strongest shape in one arrangement can be the wrong shape in another, and a grade series chosen for its name rather than its temperature row can be the wrong series for a warm environment. The published evidence on this site supports a different kind of answer: a shape range that can be checked, a temperature table that can be read, and a direction list that can be copied exactly.
Grade names illustrate the trap. A higher grade number is often read as simply stronger, but the shared temperature table shows why that reading is incomplete: each series carries a listed maximum working temperature, from 80°C for the N35–N52 series up to 200°C for the 28EH–38EH series, and a grade chosen without its temperature row may be discussed for an environment it was not listed for. The grade page on this site therefore treats grades as series plus temperature, and nothing more, and buyers should do the same in an inquiry: state the operating temperature, and let the series discussion follow from it.
What the published pages do say about strength
The company's product pages describe the sintered neodymium magnet as the strongest magnetic material commercially available today. That sentence is a company product-page statement about the material family, and this site keeps it in that form. It is not a measurement of a particular magnet, and it must not be quoted as if a specific disc, block or ring had been measured to a specific force. The company's sintered page also carries demagnetization curve charts; their values were not transcribed item by item, so no curve number is quoted here and no strength figure is derived from a curve. A buyer who needs curve data for a specific grade series should ask for the chart for that series.
The assemblies background sentence works the same way. The company's text says an assembly, which combines magnetic alloy with non-magnetic material, can usually produce a stronger magnetic effect than a single magnet and achieve effects a single magnet cannot. That is a category explanation, not a parameter for any named assembly, and the assemblies page on this site lists the eight assembly names without a pull-force figure for any of them. Quoting the background sentence as a promise for a particular mounting or channel assembly would be exactly the kind of expansion this site avoids.
How to specify strength without inventing a figure
Specify the job, not the adjective. State the shape and its dimensions inside the published range, the grade series under discussion, the magnetization direction as listed for that shape, the distance and arrangement the magnet must work across, and the temperature it will see. If a force is genuinely required, state it as a requirement to be confirmed — for example, the force the assembly must hold at a stated distance and temperature — rather than as a property you assume the magnet already has. That framing lets the review answer yes, no, or with a different shape, instead of guessing what strong meant.
Distance deserves a line of its own, because magnetic effect falls off with distance in a way that surprises buyers who think only about the magnet. Two magnets with the same name can behave very differently if one works in contact and the other works across a gap, and a housing, a coating question or a fixing plate between magnet and load changes the arrangement further. Describing the working arrangement in the inquiry, even in a single sentence, is therefore part of specifying strength, not decoration around it.
Temperature, direction and shape: the three checks that qualify strength
Temperature comes first among the qualifiers, because it is the one most often forgotten until a magnet is already in service. Read the operating temperature, not the room temperature, and discuss the grade series against the shared table: N35–N52 at 80°C, M series at 100°C, H series at 120°C, SH series at 150°C, UH series at 180°C and EH series at 200°C. A magnet discussed only by grade name, without its temperature row, has not yet been specified for a warm environment at all.
Direction comes second, and shape third, but the three are checked together. A direction copied from the wrong shape's list, or a dimension borrowed from another shape's table, invalidates the specification even if the grade discussion was careful. The detail page for the chosen shape is the only source for its dimensions, tolerances and directions on this site, and the inquiry should be checkable line by line against that page. If a combination is not listed — a direction for a shape that does not list it, or a size outside the range — ask whether it can be made rather than assuming it.
Questions to send with a strength inquiry
A specification that can be answered names four items together: the shape family, dimensions inside that family's published range, the grade temperature series, and the magnetization direction exactly as listed for that shape. Add the operating temperature and the fixing method where they affect the choice, and ask coating and warranty as open questions. Please confirm minimum order quantity and lead time before ordering. Warranty terms are unavailable on the published pages — please confirm warranty terms before ordering. Certificates are available upon request; no certificate number or issuing body is published here.
An inquiry that names only a grade, or only a size, will be answered with questions rather than a confirmation, because neither item alone is a complete specification. The extra sentence that states the direction in plain words, or that gives the mating dimension for a fixing, is often the sentence that prevents a second round of correspondence, and it costs nothing to include at the start.
Frequently asked questions
Which grade series should I discuss for ndfeb magnet strength: a concept guide?
Discuss the grade series against the shared grade maximum working temperature table, using the temperature the magnet will actually see in service, including heat from neighbouring parts. The series run from N35–N52 at 80°C through the M series at 100°C, the H series at 120°C, the SH series at 150°C and the UH series at 180°C to the EH series at 200°C. State the operating temperature as a figure in the inquiry, because a grade name without its temperature row has not been specified for a warm environment, and the review needs the temperature to confirm the series discussion rather than infer it from a name alone.
How exactly should I state the magnetization direction?
Copy the direction exactly as listed for the shape named in the inquiry, and do not substitute a synonym that feels equivalent, because the same word can describe a different arrangement on a different shape. Where a drawing uses a different convention, add a plain-words description of the pole positions alongside the listed term, so the review can reconcile the two without guessing. A direction that is assumed rather than confirmed is a common source of a magnet that is dimensionally correct and magnetically wrong for its fixing, so the extra sentence describing the poles is worth writing even in a short inquiry.
What should I ask about coating, warranty and certificates?
Please confirm coating requirements before ordering, because coating type names were not transcribed from the company illustration and no coating type is named on this site; state the operating environment with the coating question so the answer can be specific. Warranty terms are unavailable on the published pages, so please confirm warranty terms before ordering rather than assuming a term. Certificates are available upon request: name the certificate required and its purpose in the inquiry, because no certificate number, issuing body, scope or validity period is published here, and a named request can be matched to the order it belongs to.
What if my size or combination is not in the published range?
Ask whether it can be made, and send the dimension as written rather than rounding it into the published range. A value outside a shape range, a direction not listed for that shape, or a combination of features from two shapes should be raised as an explicit question, with a dimensioned sketch where the geometry is curved, holed or otherwise not captured by a single size figure. Please confirm minimum order quantity and lead time before ordering. A question asked before ordering costs one message; a forced fit into the nearest published table can cost the whole part, because a magnet that matches its order and fails its fixing is worse than an extra round of questions.