50X50X10/20/25mm Super Strong Big Rectangular Neodymium Magnet Block¹

Product Description Product Description Block Neodymium Magnets/Neodymium Bars/Rectangular Neodymium Magnets offer outstanding performance in terms of magnetic intensity and pulling strength. They are widely used for motor, sensor and holding applications. The normal surface treatment is nickel plating, epoxy resin coating or zinc plating.  Product Name50 x 50 x 10/20/25 mm Super Strong Big Neodymium Magnet BlockMagnet ShapeBlock ShapeDimensions50 x 50 x 10/20/25 mmMagnet MaterialNdFeBGradeN33-N52 (M, H, SH, UH, EH, AH)Tolerance±0.05~0.1mmPlating/CoatingNickel/Epoxy Resin/Zinc, etc.Magnetism DirectionThrough the thicknessCountry Of OriginChina Technical DataSize InformationAs almost all the magnets are customized according to customers' requirement, below we list the maximum size and minimum size we can make for some typical shapes of magnets for your reference. Magnets ShapesMax. Size (mm)Min. Size (mm)RemarksBlock240 x 100 x 502 x 2 x 1Optional customized countersunk boreholesCylinder/DiscD240 x 50D2 x 1RingOD240 x 50 (ID customized)D5 x 1 x 1 Arc/TileCustomized  Some block neodymium magnets sizes we made in the chart below for your reference.5 x 1.5 x 1mm block neodymium magnet18 x 15 x 10mm block neodymium magnet5 x 2.5 x 1.5mm block neodymium magnet18 x 18 x 4mm block neodymium magnet5 x 2.5 x 2mm block neodymium magnet19.05 x 12.7 x 6.35mm block neodymium magnet5 x 4 x 1mm block neodymium magnet20 x 4 x 2mm block neodymium magnet5 x 4 x 1.5mm block neodymium magnet20 x 4 x 3mm block neodymium magnet5 x 5 x 1mm block neodymium magnet20 x 5 x 2mm block neodymium magnet5 x 5 x 1.2mm block neodymium magnet20 x 5 x 5mm block neodymium magnet5 x 5 x 2mm block neodymium magnet20 x 10 x 2mm block neodymium magnet5 x 5 x 3mm block neodymium magnet20 x 10 x 5mm block neodymium magnet6 x 4 x 2mm block neodymium magnet20 x 20 x 3mm block neodymium magnet6 x 5 x 2mm block neodymium magnet20 x 20 x 5mm block neodymium magnet7 x 6 x 1.2mm block neodymium magnet20 x 20 x 10mm block neodymium magnet8 x 4 x 3mm block neodymium magnet22 x 8.5 x 1.4mm block neodymium magnet8 x 5 x 5mm block neodymium magnet25 x 6 x 2mm block neodymium magnet8 x 8 x 4mm block neodymium magnet25 x 8 x 1mm block neodymium magnet10 x 3 x 2mm block neodymium magnet25 x 15 x 6mm block neodymium magnet10 x 4 x 1mm block neodymium magnet25.4 x 25.4 x 12.7mm block neodymium magnet10 x 4 x 1.2mm block neodymium magnet30 x 7 x 2.5mm block neodymium magnet10 x 4 x 1.5mm block neodymium magnet30 x 10 x 5mm block neodymium magnet10 x 4 x 2mm block neodymium magnet30 x 10 x 10mm block neodymium magnet10 x 5 x 1mm block neodymium magnet30 x 12 x 12mm block neodymium magnet10 x 5 x 1.2mm block neodymium magnet30 x 15 x 6mm block neodymium magnet10 x 5 x 1.5mm block neodymium magnet30 x 30 x 15mm block neodymium magnet10 x 5 x 2mm block neodymium magnet40 x 10 x 5mm block neodymium magnet10 x 5 x 3mm block neodymium magnet40 x 10 x 10mm block neodymium magnet10 x 6 x 6mm block neodymium magnet40 x 15 x 5mm block neodymium magnet10 x 10 x 1mm block neodymium magnet40 x 18 x 5mm block neodymium magnet10 x 10 x 1.2mm block neodymium magnet40 x 20 x 5mm block neodymium magnet10 x 10 x 2mm block neodymium magnet40 x 20 x 10mm block neodymium magnet10 x 10 x 3mm block neodymium magnet40 x 40 x 20mm block neodymium magnet10 x 10 x 4mm block neodymium magnet46 x 30 x 10mm block neodymium magnet10 x 10 x 5mm block neodymium magnet50 x 15 x 15mm block neodymium magnet12 x 7 x 2mm block neodymium magnet50 x 25 x 10mm block neodymium magnet12 x 8 x 2mm block neodymium magnet50 x 50 x 12.5mm block neodymium magnet15 x 4 x 4mm block neodymium magnet50.8 x 50.8 x 25.4mm block neodymium magnet15 x 15 x 3mm block neodymium magnet60 x 30 x 15mm block neodymium magnet15 x 15 x 8mm block neodymium magnet70 x 70 x 30mm block neodymium magnet18 x 8 x 4mm block neodymium magnet110.6 x 89 x 19.5mm block neodymium magnet Neodymium Magnets Production ProcessNeodymium Magnets Performance DatasheetNeodymium Magnets Magnetization DirectionsNeodymium Magnets Surface TreatmentSurface TreatmentProcessThicknessColorSSTPCT(μm)(Hours)(Hours)NickelNi10 ~ 20Bright Silver> 24 ~ 72> 24 ~ 72Ni+Cu+NiBlack NickelNi+Cu+Ni10 ~ 20Bright Black> 48 ~ 96> 48Cr3+ZincZn5 ~ 8Bright Blue> 16 ~ 48---Cr3+ZnShining Color> 36 ~ 72SnNi+Cu+Ni+Sn10 ~ 25Silver> 36 ~ 72> 48AuNi+Cu+Ni+Au10 ~ 15Gold> 12> 48AgNi+Cu+Ni+Ag10 ~ 15Silver> 12> 48EpoxyEpoxy10 ~ 20Black/ Grey> 96---Ni+Cu+Epoxy15 ~ 30> 120---Zn+Epoxy15 ~ 25> 120---Passivation---1 ~ 3Dark GreyTemporary Protection---Phosphate---1 ~ 3Dark GreyTemporary Protection---Remarks:1. The SST results differ from coating. In general, Salt Spray Test result for the magnets with barrel plating (normally for small size of magnets), is better than the ones with rack plating (normally for big size of magnets).2. Salt Spray Test (SST) condition: 5% NaCl, 35°C, continuously spray a certain time, test whether there is corrosion on plating/coating surface.3. Pressure Cooking Test (PCT) condition: 2 atm, 95% RH (Relative Humidity), 121°C to test the plating/coating adhesion. (Zinc, Passivated/Phosphated, and Epoxy not suitable for PCT).4. Other test methods for plating/coating: Drop Test, Cross Cut Test, Heating and Spilling Test, Constant Temperature, Humidity Test, etc.  Physical Properties of Neodymium MagnetsCurie Temperature (°C)310~380Maximum Working Temperature (°C)80~230Electrical Resistivity (μ.cm)110~170Hardness (Hv)560~580Density (g/cm3)7.4~7.8Relative Recoil Permeability (μrec)1.05Saturation Field Strength (kOe/kA/m)(30-40)/(2,400-3,200)Temp. Coefficient of Br (T.C.α (Br)) (%/°C)-0.12 ~ -0.10Temp. Coefficient of Hcj (T.C.β (Hcj)) (%/°C)-0.6 Packing & Shipping Packing - Inner Packaging- Standard Air and Express Packaging- Standard Sea PackagingShipping-When the gross weight is below 50kgs, we recommend to send it after packed in magnetism shielded cartons by express. -When the gross weight is between 50-100kgs, it can be sent by express or air. -When the gross weight is over 100kgs, we recommend to ship it by sea. Remarks: We have good contract prices with FedEx, DHL, UPS and TNT. Of course you can choose freight collect with your international courier's account no. For air and sea shipping, we have an experienced logistics team to handle the delivery and our own forwarders that we have been cooperating with for many years. If you would like to ask your forwarder to deal with the delivery, it is also okay with us. Company Introduction Hangzhou Shengyuan Machinery Co., Ltd. is specialized in manufacturing permanent magnets and magnetic assemblies. Our main products include neodymium magnets, SmCo magnets, AlNiCo magnets, ferrite magnets, pot magnets, magnetic hooks, fishing magnets, magnetic lifters, magnetic rods & grates, magnetic pushpins, magnetic tool holders and magnetic chucks, etc. We have a professional R&D team with plenty expertise and a sales team with rich experience in overseas business. Furthermore, all our products are manufactured with advanced equipment and strict QC procedures in order to ensure high quality. Our company's core value is "Building A Good Reputation With Quality Products And Excellent Service". With the advanced management concepts and experienced team, we have exported our products to many countries and regions all over the world, especially to North America and Europe. Our products enjoy a good reputation among our customers. We welcome customers, business associations and friends from all parts of the world to contact us and seek cooperation for mutual benefits.  Add.: No. 66, Leda Rd., Xiaoshan Economic & Technological Development Zone, Hangzhou City, Zhejiang Province, 311200 China. CONTACT US...  Why Choose Us 1. Factory direct price makes our customers more competitive in the market. 2. OEM and customization is welcome.3. Quick response to customers.4. Professional R&D team with extensive expertise in the area of magnets and magnetic assembies . Most of our engineers at least have 10 years experience.5. Advanced production and inspection equipment.6. Strict quality control system. ISO9001:2015 and RoHS7. Experienced logistics team to deal with FOB, CIF and DDU terms.  FAQ -What information should I provide in my inquiry?1. Maximum working temperature.  2. Magnet's grade or magnetic flux density at the center.3. Magnet dimensions and tolerance.4. Any surface treatment on the magnet?5. Order quantity.6. Any special requirements for the packaging and transportation? -How soon can I expect to get your reply?Normally you can receive our reply within 1 hour during our work time 08:00 - 18:00(UTC-8). -How will you ship the samples to me?We will use international express such as FedEx, DHL, UPS and TNT. We have a good contract price with them. -What is the normal delivery time for the customized magnet's order?The normal delivery time is about 20 days. -How about the payment methods?We accept T/T, PayPal, Western Union and L/C

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