- Overview
- Product Description
- Technical Data
- Packing & Shipping
- Company Information
- Why Choose Us
- FAQ
Basic Info.
Model NO.
SF Series
Size
Shown in The Technical Data Below
Tolerance
±0.1mm
Packaging
Pallet/Air Carton/Express Packaging
Plating/Coating
Nicuni/Black Epoxy/Colorful Painting, etc.
Certification
ISO9001, ISO14001 & RoHS
Magnetism Direction
Axially Magnetized
Transport Package
Pallet/Air Carton/Express Packaging
Trademark
SYM
Origin
Zhejiang, China
Production Capacity
2000000 Piece/Pieces Per Month
Product Description
Rare earth neodymium pot magnets with eyebolts, also referred to as eyelet style magnetic hooks use neodymium magnets to attract on the flat surface and the eyelet style ring (the eyebolt) to hang the object. It can also be used to salvage ferromagnetic metals under the water with a rope tied on the eyebolt, so it is called fishing magnet too. Its common applications as a pot magnet is for carpentry, metal kitchen utensils, exhibition stand construction, shopfitting, signage technology, etc. The cup shaped metal shells are designed to optimize the magnetic flux to make the pull force bigger. The standard magnet material is NdFeB N35 and standard surface treatment is nickel plating both for the magnet and metal shell.
| Magnet Shape | Pot/Cup Shape |
| Dimensions | Shown in the chart below |
| Magnet Material | Neodymium N35 or Customized. |
| Tolerance | +/-0.1mm |
| Plating/Coating | Nickel/Epoxy Resin/Colorful Painting, etc. |
| Magnetism Direction | Axially Magnetized |
| Country Of Origin | China |
Size Information
- Metal shells made by stamping process
The standard version is the metal shells are made by stamping.
| Model | D (mm) | d (mm) | M (mm) | h (mm) | H (mm) | H1 (mm) | Attraction (Kgs) | Weight (gs) |
| NSF10 | 10 | 6 | M3 | 5 | 12.5 | 33 | 2 | 7 |
| NSF12 | 12 | 6 | M3 | 5 | 12.5 | 33 | 4 | 8 |
| NSF16 | 16 | 6.5 | M4 | 5 | 12.6 | 34.6 | 8 | 12 |
| NSF20 | 20 | 6.5 | M4 | 7 | 14 | 36 | 12 | 21 |
| NSF25 | 25 | 7.5 | M5 | 8 | 17 | 44.5 | 23 | 38 |
| NSF32 | 32 | 10 | M6 | 8 | 18 | 47.5 | 34 | 63 |
| NSF36 | 36 | 10 | M6 | 8 | 18 | 47.5 | 50 | 71 |
| NSF42 | 42 | 10 | M6 | 8.6 | 18 | 47.5 | 72 | 106 |
- Metal shells made by machining process
The metal shells are made by CNC lathing
| Model | D (mm) | d (mm) | M (mm) | h (mm) | H (mm) | H1 (mm) | Attraction (Kgs) | Weight (gs) |
| CSF48 | 48 | 12 | M8 | 11 | 24 | 60.5 | 81 | 187 |
| CSF60 | 60 | 12 | M8 | 15 | 28 | 64.5 | 160 | 367 |
| CSF75 | 75 | 17 | M10 | 18 | 35 | 91 | 270 | 697 |
Neodymium Magnets Production Process
Neodymium Magnets Performance Datasheet
Neodymium Magnets Magnetization Directions
Neodymium Magnets Surface Treatment
| Surface Treatment | Process | Thickness | Color | SST | PCT |
| (μm) | (Hours) | (Hours) | |||
| Nickel | Ni | 10 ~ 20 | Bright Silver | > 24 ~ 72 | > 24 ~ 72 |
| Ni+Cu+Ni | |||||
| Black Nickel | Ni+Cu+Ni | 10 ~ 20 | Bright Black | > 48 ~ 96 | > 48 |
| Cr3+Zinc | Zn | 5 ~ 8 | Bright Blue | > 16 ~ 48 | --- |
| Cr3+Zn | Shining Color | > 36 ~ 72 | |||
| Sn | Ni+Cu+Ni+Sn | 10 ~ 25 | Silver | > 36 ~ 72 | > 48 |
| Au | Ni+Cu+Ni+Au | 10 ~ 15 | Gold | > 12 | > 48 |
| Ag | Ni+Cu+Ni+Ag | 10 ~ 15 | Silver | > 12 | > 48 |
| Epoxy | Epoxy | 10 ~ 20 | Black/ Grey | > 96 | --- |
| Ni+Cu+Epoxy | 15 ~ 30 | > 120 | --- | ||
| Zn+Epoxy | 15 ~ 25 | > 120 | --- | ||
| Passivation | --- | 1 ~ 3 | Dark Grey | Temporary Protection | --- |
| Phosphate | --- | 1 ~ 3 | Dark Grey | Temporary 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.
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 Magnets
| Curie Temperature (°C) | 310~380 |
| Maximum Working Temperature (°C) | 80~230 |
| Electrical Resistivity (µ.cm) | 110~170 |
| Hardness (Hv) | 560~580 |
| Density (g/cm3) | 7.4~7.8 |
| Relative Recoil Permeability (µrec) | 1.05 |
| Saturation Field Strength (kOe/kA/m) | (30-40)/(2,400-3,200) |
| Temp. Coefficient of Br (T.C.α (Br)) (%/°C) | -0.12 ~ -0.10 |
| Temp. Coefficient of Hcj (T.C.β (Hcj)) (%/°C) | -0.6 |
Shipping
-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.
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.
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. 200, Jianshe 1st Rd., Xiaoshan Economic & Technological Development Zone, Hangzhou City, Zhejiang Province, 311200 China.
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 RoHS
7. Experienced logistics team to deal with FOB, CIF and DDU terms.
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 RoHS
7. Experienced logistics team to deal with FOB, CIF and DDU terms.
-What information should I provide in my inquiry?
1. Model No. 2. Order quantity. 3. Standard plating/coating or others? 4. Any special requirements for the packaging and transportation?
1. Model No. 2. Order quantity. 3. Standard plating/coating or others? 4. 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).
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?
The normal delivery time is about 15 days.
-How about the payment methods?
We accept T/T, PayPal, Western Union and L/C