Neodymium Block Magnet 50mm x 20mm x 5mm | 2x Countersunk holes D8/D4 | N42
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NdFeB Countersunk block magnets
Shape: Block
Size: 50mm length x 20mm width x 5mm thickness
Countersunk hole diameter: 2 countersunk holes D8/D4
Grade: N42
Coating: Nickel
Magnetised thru thickness 5mm
This large and powerful Neodymium block magnet has two countersunk holes that allow it to be attached permanently in place with screws or to attach an eyelet to guide wiring or alternatively to attach a string, creating a metal retrieval or pickup tool. It is most commonly used in magnetic closure systems for doors and drawers where it attracts metal surfaces or a striker plate and secures them. It can also be attached with screws to any item so that item will attach to metal surfaces in workshops, factories, the home or office. By screwing the magnet onto plastic, timber or other materials, the item becomes magnetic and can attach to machinery, shelving, steel fire doors, shipping containers, railings and staircases Countersunk holes make this magnet simple and easy to attach in the correct location.
DO NOT OVERTIGHTEN OR USE OVERSIZED ATTACHMENT SCREWS OR THE MAGNET MAY CRACK AND FAIL.
Typical Physical Properties
NB: Ranges are indicative for product category, please check individual products for specic values within that range.
Production Flow Diagram
Demagnetization Curves
Surface Treatment
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.
Range and Tolerance
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.
Magnetic Properties
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.
Returns Policy
If you are not entirely satisfied with your purchase, we're here to help.
We have a 30 Day Returns policy at Frenergy Magnets. You may return your item within 30 days of receiving it to receive a refund.
The product/s must be unused and in the same condition you received them in. Please contact us at info@frenergy.com.au to initiate the returns process.
The buyer is responsible for the cost of returning the order.
