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Medium Discs (Over 1/2 in. up to 1 in.)
Neodymium Disc Magnets › Medium Discs (> 1/2 in. to 1 in.)
Medium Neodymium Disc Magnets (> 1/2 in. to 1 in. / 12.7 mm to 25.4 mm)
Industrial-grade rare earth neodymium disc magnets with diameters measuring greater than 1/2 inch up to 1 inch (12.7 mm to 25.4 mm). Sintered from high-performance NdFeB alloy grades ( N35 to N52 ), these mid-sized circular discs deliver direct clamping forces from 1.9 lbs up to 200 lbs with surface flux densities ranging from 13,500 to 14,400 Gauss (1.35 to 1.44 Tesla).
Sensors & Switches
Activating industrial reed switches, Hall-effect position sensors, and meters.
Heavy Fixtures & Latches
Concealed magnetic fasteners for cabinetry, packaging closures, and door latches.
ISO 9001 Manufacturing
Precision machined to strict ±0.002 in. dimensional tolerances across all profiles.
Axial & Diametric Options
Stocked in standard face poles as well as side-magnetized diametric configurations.
Technical Overview: Medium Neodymium Disc Magnets (> 1/2 in. to 1 in.)
Medium neodymium disc magnets measuring greater than 1/2 inch up to 1 inch in diameter (12.7 mm to 25.4 mm) represent the most widely specified workhorse size tier in our Neodymium Disc Magnets collection. Manufactured under ISO 9001 quality standards with strict tolerances of ±0.002 in. / ±0.05 mm, these sintered NdFeB circular discs bridge the gap between small fasteners and ultra-heavy industrial lifting blocks. Featuring residual flux densities between 13,500 and 14,400 Gauss (1.35 to 1.44 Tesla), they provide exceptional magnetic energy in a compact physical profile.
Grade Selection & Temperature Thresholds
- Material Grades ( N35 to N52 ): Available across standard N35 - N45 grades for versatile commercial holding up to premium N50 and N52 formulations for maximum energy product ( 52 MGOe ) in space-constrained assemblies.
- Thermal Limits (176°F to 392°F): Standard grades operate safely up to 176°F (80°C). For elevated temperature environments like electric motors or machinery enclosures, high-coercivity grades (such as N42SH ) withstand higher thermal exposure without losing magnetic strength.
- Magnetization Orientations: Stocked primarily in axial magnetization (poles on the flat circular faces for maximum direct clamping). Diametrically magnetized variants (poles on the rim) are available for magnetic bearings, rotational sensors, and specialized triggers.
Target Industrial, Technical & Commercial Applications
- Industrial Automation & Sensors: Actuating Hall-effect position sensors, reed switches, magnetic bearings, and electric motor rotors.
- Workholding & Machinery Fixtures: Securing steel plates, jigs, and tooling during manufacturing and welding.
- Commercial Fasteners & Packaging: Concealed latches for luxury packaging closures, heavy cabinetry, and door assemblies.
- Educational & Research Use: Demonstrating electromagnetic principles, flux field lines, and physics experiments in educational labs.
Protective Coatings, Storage & Safety Protocols
All stock medium discs feature a protective triple-layer Nickel-Copper-Nickel (Ni+Cu+Ni) plating for dry indoor use. For humid or outdoor environments, additional protective coatings like epoxy or rubber encapsulation can be supplied to prevent moisture corrosion.
Crush Hazard & Storage Notice: Medium-sized neodymium magnets exert substantial pulling forces (up to 200 lbs on thick N52 profiles). Never allow discs to snap together freely, as the brittle ceramic alloy will shatter into sharp metallic fragments and cause pinch injuries. Always store in a cool, dry place separated by non-magnetic plastic or wooden spacers, slide magnets apart laterally, and keep well clear of medical implants, pacemakers, credit cards, and sensitive electronics.
Frequently Asked Questions (FAQ)
What physical dimensions define a "Medium" disc magnet?
This subcategory covers circular rare earth neodymium disc magnets with outer diameters measuring greater than 1/2 inch up to 1 inch (12.7 mm to 25.4 mm).
How do medium disc magnets differ from rectangular block magnets?
Disc magnets feature a circular geometry ideal for flush mounting into pre-drilled round holes and rotational assemblies. For anti-pivot requirements or flat channels, visit our Neodymium Block Magnets category.
Can medium neodymium disc magnets be drilled or machined?
No. Sintered NdFeB is extremely hard and brittle. Machining or drilling will crack the magnet, ruin the protective plating, and produce combustible rare-earth dust. Custom pre-molded sizes or countersunk holes should be ordered directly from the manufacturer.
What is the typical lifespan of these neodymium disc magnets?
Under proper operating conditions (kept below rated temperature limits and protected from corrosive moisture), NdFeB disc magnets lose less than 1% of their magnetic field strength over 100 years.