Large 20mm x 8mm x 5mm Bonded Neodymium block magnets NB10 (5 250 pcs) DIY

  
Craft / Ferrite -make your own. Flexible - strip, paper, signs. Neodymium N52 - High Grade. Large 20mm x 8mm x 5mm Bonded Neodymium block magnets NB10 (5 - 250 pcs) DIY. Bonded neodymium is made by combining neodymium powder with resin and then either injection moulding with nylon or compression moulding with epoxy. They are not as brittle as sintered neodymium magnets but the knock on effect is that they are not as strong and this particular grade is a stepping stone between C8 ferrite and the strength of sintered neodymium. Length: 20 mm (0.78). Width: 8 mm (0.31). Thickness: 5 mm (0.2). Axially Magnetised through the thickness so that one 20x8mm face is north, the other is south. Maximum Temp: 140°C / 284°F. Theoretical Maximum Pull: 2.04lb / 32oz / 930g. Calculated Max Vertical Hold-guidance only: 0.4lb / 6.4oz / 186g. All neodymium magnets are unsuitable for children; do not ingest. All neodymium magnets are brittle; do not allow these magnets to jump together or to an iron/steel surface - they will break, crack, chip or shatter. These magnets are ideal for use in motors and in applications where more pull is required than that provided by ferrite, but less than normal sintered neodymium magnets. They are also great for a range DIY uses. If you need to use an adhesive, we recommend using something that will bind to metal and whatever surface you want to glue the magnet to. The pull is calculated using a mathematical formula and is, therefore, the theoretical maximum hold between one magnet and a mild steel plate.

It does not take account of manufacturing tolerances, plating, plating thickness or variances in a mild steel plate. The vertical hold is based upon the calculated pull and is, therefore, only for guidance. Factors such as paint thickness, plasticised surfaces, movement and vibration are not taken into account. WARNING: Neodymium magnets are unsuitable for children under 8.

All neodymium magnets are brittle. Do not allow these magnets to jump together or to an iron/steel surface - they will break, crack, chip or shatter. Thin neodymium magnets DO NOT FLEX, if you attempt to flex them they will snap in half. THIS IS NOT A TOY.