Neodymium Block Magnet - 7mm x 3mm x 7mm with 3.5mm hole | N35
Product code: B-W7H3L7-D3.5
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Neodymium Block Magnet - 7mm x 3mm x 7mm with 3.5mm hole | N35
Magnetic Product Description:
This neodymium magnetic block has a length of 7mm, a width of 7mm and a height of 3mm. It has a centre hole 3.5 diameter and is side magnetised. It is identified by the AMF magnet part number B-W7H3L7-D3.5.
Uses for our rare earth block magnets:
Neodymium Block or rectangular magnets like this N35 Grade example are often used as a component in magnetic clamps, knife and tool holders and magnetic door latches. The centre hole surfaces help them to bond securely with other materials. Magnets used for holding applications usually incur a considerable amount of impact during constant attachment or closure, so a protective steel case is often used to take the brunt of the impact and overcome possible damage to the magnet from repeated use.
Steel u-shaped channel with a similar width and slightly higher height dimension to the magnetic blocks within is often used for this task. The bar magnet can be permanently glued into position inside the protective channel. Placing multiple block magnets end to end inside a channel can increase the contact area and holding capacity of assemblies such as tool holders and magnetic sweepers. These magnetic storage and cleaning tools are able to cover broader areas and remove hazardous metal swarf from workshop floors and benchtops more efficiently.
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NB: Ranges are indicative for product category, please check individual products for specic values within that range.
The most common coating for Neodymium magnets is Nickel + Copper + Nickel (Ni + Cu + Ni). This coating offers the magnet relatively good protection from corrosion and passive applications. If the magnet will be exposed to moisture or liquid then consider the use of an organic coating such as Epoxy. A hard wearing coating, Epoxy is suited to applications where the magnet will come under some friction or knocking.
Magnets are readily available in Blocks, Discs, Cylinders & Rings. AMF Magnetics specializes in the supply of short-run prototype magnets including Arc Segments, various magnetic orientations etc. If you need a magnet size that we don't carry in stock, submit a Design-a-Magnet enquiry for a quote on your custom magnet design.
Neodymium magnets are offered in several different grades. The first section N30-54 has an operating temperature of up to 80 degrees. Most of our stock only goes up to N38. The second section, denoted with the "M" prefix after the grade has an operating temperature 100 degrees. After this the grades are "H", "SH", "UH" & "EH". In order for the magnet to withstand a higher operating temperature, during production more of the raw material PrNd is incorporated as these elements have a naturally occurring resistance to high temperatures.
