20mm Neodymium Rare Earth Countersunk Cup/Pot Mounting Magnets N52 (8 Pack)
20mm Neodymium Rare Earth Countersunk Cup/Pot Mounting Magnets N52 (8 Pack)
| Quantity of Packs | Price per Pack | Discount |
|---|---|---|
| Buy 2 | $22.61/pack | 5% Off |
| Buy 3 | $21.42/pack | 10% Off |
| Buy 5 | $20.23/pack | 15% Off |
| Buy 10 | $19.04/pack | 20% Off |
| Buy 25 | $17.85/pack | 25% Off |
| Buy 50 | $16.66/pack | 30% Off |
| Buy 100 | $15.47/pack | 35% Off |
Magnet Specifications
| Imperial Size | 0.79 x 0.28 Inch (Diameter x Thickness) |
|---|---|
| Metric Size | 20 x 7 mm (Diameter x Thickness) |
| Countersunk Hole Size | 8.5 x 4.5 mm at 90° |
| Countersunk Hole Location | One Side, Paired N & S (Equal Quantity of Each) |
| Screw Size | M4 |
| Material Grade | N52 |
| Pull Force | 20 lbs |
| Coating | Nickel-Copper-Nickel (Ni-Cu-Ni) |
| Magnetization Direction | Axially - Pair |
| Magnet Material | Sintered Neodymium (NdFeB) |
| Tolerance | +/- 0.004 Inches |
| Max Operating Temperature | 80°C / 176°F |
| Flux Density (Br) | 14,800 Gauss |
| Part Number | 20MMPOTN52-8PK |
| Quantity Included | 8 Countersunk Magnets |
Produced in an ISO 9001 Facility
Manufactured to Meet RoHS & REACH Standards
The Benefits of Pot Magnets
Pot magnets, also known as cup or mounting magnets, are standard neodymium magnets that are encased in a protective steel housing on the N or S side. Engineered to provide superior sturdiness and impact resistance, this steel housing or “pot” is also ferromagnetic, thereby incrementally increasing the pull force of the magnet itself.
So, in addition to being exceptionally tough and resilient, neodymium pot magnets also provide a stronger pull force than a regular magnet with an equal N-rating and size. This is because the metal housing focuses the magnetic field in one direction, increasing the magnet's holding power.
Pot magnets give you much greater durability and pull force than regular neodymium magnets, and as a result, you get more magnet for your money.
Interested in more mounting magnets? Shop our full selection of pot magnets and channel magnets.
Sold in Matched North/South Pairs
This pack includes 4 magnets with the countersink on the north face and 4 with the countersink on the south face, so one of each makes a pair that attracts.
Mount one magnet from each group on opposite sides of a cabinet door, lid, latch or display, and their exposed faces will pull together. Before you install, sort the pack into two piles by testing which magnets attract face to face, then mark the piles so they don't get mixed up. If one side is steel instead, any magnet in the pack will work, since both poles attract steel equally.
Need a different north/south split? Please contact us.
Learn more:
Are the Countersunk and Self-Adhesive Magnets Paired Equally North/South?
Installing Countersunk Magnets: Snug, Not Tight
Tighten each screw only until its head sits flush with the magnet, then stop. Neodymium is hard but brittle, so it can't flex like a steel washer. Once the screw head seats, every extra turn wedges it deeper into the countersink and can crack the magnet around the hole.
Use M4 flat-head screws. Avoid pan-head and round-head screws, which press on the thin edge of the hole.
Drive the screw by hand when you can. If you use a drill/driver, set the clutch to a low number, drive slowly, stop about one turn early and finish by hand. Don't use an impact driver or drill mode. Mount the magnet on a flat surface over a pilot hole, because a bump or glue drip underneath can crack it as you tighten.
Learn more:
How Do I Install Countersunk Magnets Without Breaking Them?
Can I Use Metric and Imperial Screws Interchangeably With Countersunk Magnets?
Similar Part Numbers: SNA20, MCHN-20
