Neodymium Ring Magnet 25 x 4 x 5 mm N48
$4.35
Prices in USD, no import duties
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Neodymium Ring Magnet 25 x 4 x 5 mm N48
MS-R-25X4X5
- Size 25 x 4 x 5 mm
- Grade N48
- Material Neodymium (NdFeB)
$4.35
Prices in USD, no import duties
- No minimum order
- Free US shipping from $50
- Volume discounts across the whole cart
Volume prices
| Quantity | Price per piece | You save |
|---|---|---|
| 1–9 (your quantity) | $4.35 | List price |
| 10–49 (your quantity) | $3.92 | −10% |
| 50–199 (your quantity) | $3.48 | −20% |
| 200+ (your quantity) | $3.05 | −30% |
Mix & match: quantities of all products in your cart count towards the tier. The discount is applied automatically in the cart.
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In stock. Ships the same working day from US stock, delivery in about 5 business days
- Free US shipping from $50
- Prices in USD, no import duties
- Shipped from the US, own stock
- 14-day returns for consumers
Description
Neodymium Ring Magnet 25 x 4 x 5 mm N48
The Neodymium Ring Magnet 25 x 4 x 5 mm (0.98" x 0.16" x 0.20") N48 is a neodymium (NdFeB) magnet in grade N48 with a nickel coating (Ni-Cu-Ni). It has an outer diameter of 25 mm (0.98"), an inner diameter (hole) of 4 mm (0.16") and a height of 5 mm (0.20"), and is magnetised axially through its height, so the two flat ring faces are the north and south poles. The central hole lets you fix it with a screw, bolt or pin, or slide it onto a shaft, for mounts, closures, sensors and model or DIY builds.
N48 is one of the higher grades of neodymium and gives a high holding force for its size (N50 and N52 are stronger still). The holding force is highest when the magnet sits directly on a thick, flat steel plate. In practice the force is lower on thin or painted steel, on rough surfaces or with an air gap.
- Dimensions: outer Ø 25 mm (0.98"), inner Ø 4 mm (0.16"), height 5 mm (0.20") (magnetised through the height)
- Grade N48 neodymium (NdFeB) with nickel coating (Ni-Cu-Ni)
- Maximum operating temperature 80 °C (176 °F)
The nickel coating protects the magnet against corrosion in dry, indoor conditions. For damp or outdoor use, seal or shield the magnet.
Please handle with care: neodymium magnets are brittle and can chip or break if they snap together, and they can pinch fingers. Keep them away from children, pacemakers and sensitive electronics.
Shipping & duties
Free US shipping from $50. Orders ship the same working day from our own US stock, with delivery in about 5 business days. Below $50, shipping is a flat $5.99. Prices are in USD, with no import duties on US deliveries. Your total is shown at checkout before you pay. Consumers can return items within 14 days.
Shipping: free US shipping from $50 · Shipping policy · Returns & refunds
Safety
Neodymium magnets are very strong. Keep them away from pacemakers, electronics and magnetic cards, wear gloves with larger sizes and keep small magnets away from children.
Technical data
Specifications
| Shape | Ring |
|---|---|
| Dimensions | 25 x 4 x 5 mm |
| Material | Neodymium (NdFeB) |
| Grade | N48 |
| Magnetisation | Axial (through height) |
| Pull force (calculated estimate) | approx. 3.4 kg / 7.5 lb, calculated |
| Max. operating temperature | 80 °C (176 °F) |
| Coating | Nickel (Ni-Cu-Ni) |
| SKU | MS-R-25X4X5 |
| Shipping weight | 18 g |
Nominal values. Real holding force depends on steel thickness, surface, air gap and direction of pull.
