N52 disc magnets combine a grade series with a shape, and this guide explains how to check that combination without inventing a product that the published pages do not list. N52 sits in the N35–N52 series of the shared grade maximum working temperature table, listed at 80°C (176°F). Disc and cylinder magnets carry their own range: diameter 1.2–220 mm, height 0.5–50 mm, standard tolerance ±0.05 mm and minimum ±0.01 mm, directions axial, diametrical and axial in segments. A combined inquiry must satisfy both items, and this guide shows how.
Grade first, or shape first? Both, checked separately
The order of checking does not matter as long as both checks happen. Check the grade discussion against the shared temperature table: N52 belongs to the N35–N52 series at 80°C, and the discussion should start from the temperature the disc will actually see. If that temperature exceeds the listed maximum for the series, the series discussion needs to move to a series with a higher listed maximum — M at 100°C, H at 120°C, SH at 150°C, UH at 180°C or EH at 200°C — and the inquiry should say so explicitly rather than assuming N52 covers every temperature. Check the shape discussion against the disc range: diameter and height inside the published spans, tolerance named from the disc tolerances, direction copied from the disc list. A combination that passes one check and fails the other is not a confirmed specification.
The most common error in combined inquiries is treating the grade name as if it carried a performance promise for the shape. It does not. The shared table gives a maximum working temperature for a series, and the disc table gives dimensions, tolerances and directions for a shape; neither gives a force, a flux figure or a suitability verdict for the combination. The company's sintered page carries demagnetization curve charts for several grades, including N52, but curve values were not transcribed, so no curve number is quoted here and no performance claim is derived from a curve. A buyer who needs curve data should ask for the chart for the specific series under discussion.
Disc geometry: diameter and height together
A disc inquiry needs diameter and height together, because a disc is defined by both. The diameter span is wide, from 1.2 mm to 220 mm, and the height span runs from 0.5 mm to 50 mm, but the spans do not promise every diameter at every height in every grade series. State both figures with the grade series and the direction, so the combination can be checked as a whole. Axial in segments deserves care here: it is listed for discs alongside axial and diametrical, and it should be copied exactly rather than shortened to axial, because the segment wording carries a different arrangement. A disc inquiry that shortens the direction has changed the specification, even if every dimension is correct.
Height is the figure most often left to assumption on discs, especially for thin discs where the height is small relative to the diameter. State the height the part actually needs, and name the tolerance the drawing requires, choosing from the disc tolerances rather than assuming a standard tolerance applies. If the disc must fit a housing or sit against a plate, give those mating dimensions as well, because a disc that matches its own table but not its housing will need a second round of questions before it can be confirmed.
Temperature in practice for N52 discs
For an N52 disc, temperature practice means reading the operating temperature honestly, including heat from neighbouring parts and from the assembly itself, and comparing it with the 80°C listed maximum for the N35–N52 series. If the operating temperature sits close to that maximum, the inquiry should say so and ask how the series choice should be discussed, rather than leaving the margin unstated. If the operating temperature is well below it, the inquiry should still state it, because a stated temperature lets the review confirm the series discussion instead of inferring it. Either way, the temperature belongs in the inquiry as a figure, not as an assumption behind a grade name.
Coating is an open question for N52 discs as for every shape here: please confirm coating requirements before ordering, since coating type names were not transcribed from the company's illustration. Fixing should be described where it matters, and if the disc is actually a countersunk disc with a hole, the countersunk detail page — hole M1–M10, forms customized — is the right specification source, not the plain disc table. Naming the right shape at the start determines which table the inquiry is checked against.
Questions to send with an N52 disc 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 n52 disc magnets 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.