{"product_id":"ring-magnet-30-x-20-x-5-mm","title":"Neodymium Ring Magnet 30 x 20 x 5 mm N48","description":"\u003ch2\u003eNeodymium Ring Magnet 30 x 20 x 5 mm N48\u003c\/h2\u003e\u003cp\u003eThe \u003cstrong\u003eNeodymium Ring Magnet 30 x 20 x 5 mm (1.18\" x 0.79\" x 0.20\") N48\u003c\/strong\u003e is a neodymium (NdFeB) magnet in grade N48 with a nickel coating (Ni-Cu-Ni). It has an outer diameter of 30 mm (1.18\"), an inner diameter (hole) of 20 mm (0.79\") 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.\u003c\/p\u003e\u003cp\u003eN48 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; it is lower on thin or painted steel, on rough surfaces or with an air gap.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDimensions: outer Ø 30 mm (1.18\"), inner Ø 20 mm (0.79\"), height 5 mm (0.20\") (magnetised through the height)\u003c\/li\u003e\n\u003cli\u003eGrade N48 neodymium (NdFeB) with nickel coating (Ni-Cu-Ni)\u003c\/li\u003e\n\u003cli\u003eMaximum operating temperature 80 °C (176 °F)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe nickel coating protects the magnet against corrosion in dry, indoor conditions. For damp or outdoor use, seal or shield the magnet.\u003c\/p\u003e\u003cp\u003ePlease 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.\u003c\/p\u003e","brand":"Magnetic Solutions","offers":[{"title":"Default Title","offer_id":54298143883611,"sku":"MS-R-30X20X5","price":3.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1039\/0038\/1531\/files\/ring-magnet-30-x-20-x-5-mm-ms.jpg?v=1791722704","url":"https:\/\/magneticsolutions.net\/en-us\/products\/ring-magnet-30-x-20-x-5-mm","provider":"Magnetic Solutions","version":"1.0","type":"link"}