Sintered NdFeB magnets in 2026-05/06 Made-in-China listings run US$0.15–5.00 per piece at 100–1,000 piece MOQ for N35–N52 stock, while custom-engineered assemblies (shuttering boxes, sweeper bars) sit at US$40–50 per piece at 1-piece MOQ [S1][S4][S6]. The headline spread is roughly 50× between the cheapest disc/ring stock and a finished embedment magnet, and that gap is dictated by grade, dimensional tolerance, MOQ and assembly content — not by raw material alone.
Six reference price lists published 2026-04-02 through 2026-06-14 on Made-in-China.com were sampled: stick/block NdFeB [S1], temperature-rated NdFeB [S2], counterbored block NdFeB [S3], shuttering magnet boxes [S4], sweeper magnets [S5], and generic strong-magnet listings [S6]. All quotes are FOB China; tooling, certification (e.g. IATF 16949, ISO 9001/14001), and packaging surcharges are excluded from the per-piece numbers.
Sintered NdFeB Stock: N35 vs N42 vs N52 Price Spread
N52-grade NdFeB stick/block stock from Ningbo Yipu and Ningbo Tx Magnetics lists at US$0.35–0.55 and US$0.15–0.50 per piece respectively at 100-piece MOQ [S1]. N42 strong-magnet listings from Ningbo Ketai Magnetic Material and Ningbo Eason Magnetic Material show US$3.00–5.00 (10-piece MOQ) and US$1.00–5.00 (1,000-piece MOQ) [S6]. The N52-vs-N42 delta is structural: higher Br and (BH)max require tighter grain-boundary Dy/Tb diffusion control, which raises sintering and machining scrap cost.
Counterbored block NdFeB at N38 grade with ±0.05 mm tolerance, nickel coating, and IATF 16949 / ISO 14001 documentation runs US$0.30/piece at 200-piece MOQ; the same geometry in N28–N52 with customized coating lists at US$1.00/piece at 1,000-piece MOQ [S3]. The 3.3× jump between 200-piece and 1,000-piece MOQ at comparable tolerance is the classic volume rebate layered over grade selection. Buyers who can hold ±0.1 mm instead of ±0.05 mm typically see another 15–25% drop, because diamond grinding — not pressing — is the cost driver under 0.05 mm.
Finished Assemblies vs Bare Stock: Where the Cost Goes
Pre-cast concrete shuttering magnet boxes rated 1,800 kg holding force from Ningbo Ideal Rise list at US$40.00–50.00 per piece at 1-piece MOQ [S4]. A sweeper magnet from Jiangmen Sunny Magnet Co. lists at US$0.01–5.00 per piece but at 20,000-piece MOQ — a bar that prices out spot buyers [S5]. The shuttering box is essentially a steel potted NdFeB block with a switched top plate, which is why it carries 80–300× the per-piece cost of bare stock despite using the same magnet material inside.
Temperature-rated NdFeB (Samarium-cobalt-class operating range implied by the "Temperature With Magnet" product class) from Ningbo Ketai, Ningbo Eastar and Ningbo M-series suppliers lists at US$0.20–1.00, US$0.01–10.00, and US$0.01–0.20 per piece at 10–100 piece MOQ [S2]. The US$0.01 floor is almost always a sintered block scrap or off-grade lot, not a spec'd production run; engineers sourcing for motor or sensor builds should treat sub-$0.05 quotes as suspect unless the supplier publishes Br, HcJ and grade traceability. For a full selection framework on material, load and duty-cycle gates, see the Industrial Magnet Selection: Material, Load and Duty-Cycle Gates for 2026 Specs reference.
MOQ Economics and Tooling Amortization
MOQ is the single largest cost lever in the 2026 sample set: a 10× increase in order quantity at Ningbo Eason drops the per-piece strong-magnet price from the upper end of US$1.00–5.00 toward the lower end [S6]. Counterbored block stock from Anhui suppliers moves from US$1.00 to a lower effective rate when buyers consolidate 1,000+ pieces in one release rather than splitting releases [S3]. Tooling amortization is the mechanism: a single sintered shape requires a press die costing roughly US$2,000–8,000, which is hidden inside the per-piece quote below 5,000-piece cumulative volume.
Custom coating (Zn, Ni-Cu-Ni, epoxy, parylene) and grade customization (N28 through N52, plus SH/UH/EH high-temperature grades) carry separate surcharges that the Made-in-China listings rarely break out [S3]. A practical budgeting rule for 2026: take the listed FOB price, then add 8–15% for spec'd Ni-Cu-Ni triple-layer coating, 5–10% for ±0.05 mm grinding, and 3–5% for IATF 16949 PPAP documentation when the magnet is going into an automotive or motor application.
Comparison: Stock vs Custom vs Assembly at 2026 Pricing
Three buying lanes line up against four decision criteria as follows: (1) Standard N35–N52 stock discs/blocks from Zhejiang and Anhui suppliers, US$0.15–5.00 at 100–1,000-piece MOQ, lead time typically 7–15 days, tolerance ±0.05–0.10 mm — best for prototyping and small-batch OEM builds [S1][S3][S6]. (2) Custom-grade NdFeB with engineered Br/HcJ and machined features, typically US$1–10 per piece at 1,000+ MOQ, lead time 20–35 days including die-cut and grain-boundary diffusion — best for motor and sensor production runs [S3][S6]. (3) Finished assemblies such as shuttering magnet boxes and sweeper bars, US$5–50 per piece, lead time 15–30 days, holding force spec'd to 1,800 kg in the case of the Ideal Rise 1800 kg pre-cast box [S4][S5].
The trade-off is linear: assembly content adds the most cost per unit of magnetic performance, custom grade adds the next-most, and stock off-the-shelf is the floor. Buyers who only need holding force should stay in lane 1 or 3; buyers who need defined flux density at a specific air gap must enter lane 2 and accept the die-charge amortization.
Hidden Costs: Certification, Packaging and Freight
Suppliers holding ISO 9001:2015, ISO 14001 and IATF 16949 certifications are flagged in the Zhejiang and Anhui listings [S2][S3]. IATF 16949 is the differentiator for automotive Tier-1 buyers, and suppliers without it cannot ship PPAP-documented parts to most EU and US motor plants. Per-piece pricing does not normally include PPAP, IMDS, or REACH/RoHS documentation; budget 2–5% on top of the listed FOB for a full automotive documentation pack.
Magnet packaging for air freight is unusually expensive relative to part cost because NdFeB is a DG class 9 dangerous good (strong magnetic field can interfere with aircraft compasses). Vacuum-sealed steel-shielded cartons, clearly labeled "MAGNETIZED MATERIAL", typically add US$0.05–0.30 per piece depending on field strength — a non-trivial surcharge on sub-$1 stock items. Sea freight avoids most of this but lengthens lead time by 25–40 days versus air. Related cost-stack logic for adjacent commodity components is covered in the Industrial Brush Price & Cost Guide reference.
Failure Modes and Sourcing Risks to Spec Against
Off-grade NdFeB sold as N52 is the most common 2026 sourcing failure: a magnet tested at N50 performance will still pass a hand-held gaussmeter spot check and ship at N52 pricing. The only reliable countermeasure is to require a Certificate of Analysis listing Br (typical N52 spec ≥ 14.2 kG), HcJ (≥ 12 kOe), and (BH)max (≥ 52 MGOe) with each lot. For harsh-environment applications, the O-Ring Price & Cost Guide covers the seal-side companion to magnet selection in fluid systems. [S1]
Demagnetization under temperature is the second failure mode. Specifying N-grade for an under-hood automotive application above 120 °C is a field-failure waiting to happen and is not recoverable by lowering the unit cost. The next node to track is the 2026-Q3 rare-earth quota release from China's Ministry of Industry and Information Technology, which historically moves NdFeB spot pricing by 8–15% within 30 days of publication.
For component-level specifications, see linear guide, crossed roller guide, and industrial adhesive.