The physical properties of samarium cobalt magnets make them brittle and prone to chipping or breaking under force. The production of one magnet involves more than ten processes, and small chips or breaks can occur during processing, inspection, transportation, or use. Therefore, we recommend that you handle and protect the magnets with great care throughout these processes. Nevertheless, small chips or breaks may still occur.
Yes, samarium cobalt magnets contain iron and can rust. However, compared to NdFeB magnets, the iron content in samarium cobalt magnets is lower, so rusting is not as severe. If the magnet is used in seawater, some rust spots may appear on the surface, but this does not affect its performance or usage.
Samarium Cobalt magnets have good corrosion resistance, so they generally do not need to be plated. However, some customers may require plating for cosmetic purposes or if the application environment is harsh. We can provide a variety of plating types, including zinc, nickel, silver, copper, chemical nickel, nickel-copper-nickel, nickel-gold, nickel-tin, epoxy, and more.
The price of SmCo5 is higher than Sm2Co17 because SmCo5 contains more cobalt, and cobalt is a rare metal, making it very expensive. Therefore, although the magnetic energy product of SmCo5 is lower than that of Sm2Co17, the price is higher.
We do not recommend unsaturated magnetization because the performance values of each batch of magnets will vary within a certain range, and it is difficult to adjust the voltage of unsaturated magnetization. Unsaturated magnetization products have extremely unstable performance and will change during use. Due to measurement errors, it is impossible to establish standard magnetic flux.
Currently, the highest performance samarium cobalt magnet that we can produce is YXG-35, with the following specifications: Br = 11,600-12,000Gs; bHc = 10,900-11,400Oe; iHc ≥ 18,000Oe; (BH)max = 32-35MGOe.
We accept cash, wire transfer (T/T), and letter of credit (L/C), with wire transfer being the preferred method. For small orders, infrequent annual orders, or initial order, payment is required before shipment. Once the trust has been built, we can consider monthly billing.
We offer a wide range of permanent magnet materials to meet the diverse needs of our customers. Our offerings include Samarium Cobalt (SmCo) magnets, Neodymium Iron Boron (NdFeB) magnets, Ferrite magnets, Alnico magnets, injection molded magnets, bonded magnets, and rubber magnets, among others.
Absolutely! Our company has the complete capability to provide magnet assemblies composed of magnets and metal components. With over 600 advanced processing and precision machining equipment, we are equipped to deliver high-quality permanent magnet assemblies and plastic integrated magnets to our customers.
The need for coatings depends on the specific permanent magnet material used. Samarium Cobalt (SmCo) and Alnico magnets are corrosion-resistant and typically do not require additional coatings for enhanced protection. On the other hand, Neodymium Iron Boron (NdFeB) magnets are susceptible to corrosion and are always coated to provide effective corrosion protection. We offer three commonly used coatings for NdFeB magnets:
The answer depends on the attributes that are important for your specific application. Different materials offer different combinations of performance characteristics. Choosing the right permanent magnet material requires careful consideration and trade-offs. Share with us your specific requirements and application details, and we will recommend the most suitable product for you.
NGYC has obtained TS16949 and ISO9001 certifications for our quality management systems, which reflects our commitment to meeting the highest quality standards in delivering exceptional products and services to our valued customers.
We have standard GD&T for our regular products, which can be found in the table below.
| Geometric Characteristics | Measuring Instruments | Measuring Instruction | Geometric Dimension Precision |
Parallelism |
Coordinate measuring machine (CMM) | Both magnet sides being processed need to be measured, put the probe on at least 4 points on each side of the magnet to perform measurement. Each side of block magnet: ≥40mm Cylinder magnet: ≥Ø40mm, 2 to 4 points more are required. | When block magnet ≥15×15mm, cylinder magnet ≥Ø15mm Parallelism≤0.1mm; When block magnet＜15×15mm, cylinder magnet＜Ø15mm Parallelism≤0.05mm; |
| Vision measuring machine | The difference between the distance 1 (the largest measured value) and distance 2 (the smallest measured value) is the measured value of the parallelism. | ||
Perpendicularity |
Coordinate measuring machine (CMM) | Make sure input the height and datum when performing the measurement of two sides of the magnet, with a result of measured dimensional values of mm. | With a right angle of 90°±0.5°, the perpendicularity is measured by converting according to the height. |
| Vision measuring machine | Measure the gap between the two adjacent straight lines (two adjacent angles against each other) to obtain the measurement result of angle value, such as 60°. | ||
Concentricity |
Coordinate measuring machine (CMM) | Measure both interior and exterior cylinders, and put the probe on 3 derived median points for each circular cross-section. | 0.1mm, not applicable for arc magnet |
| Vision measuring machine & dial gauge | Use the vision system to measure center points of two circles, so that the coaxiality can be obtained through the measurement of the distance between the center points of the two circles. Then, hold the magnet in place and use the dial gauge to measure the magnet. With the magnet rotation, the dial gauge measures around specified circumference to obtain the concentricity. | ||
Symmetry |
Coordinate measuring machine (CMM) | It is useful for measurement of shaped items. Set up a coordinate in the center of the surface, enabling the deviation to be accurately measured. | ≤0.15mm |
| Vision measuring machine | Set up a coordinate in the center of the surface, and measure the difference in distance between the two line segments (from the side to center line). | ≤0.10mm | |
Flatness |
Coordinate measuring machine (CMM) | Put the probe on at least 4 points on each side of the magnet to perform measurement. Each side of block magnet: ≥40mm Cylinder magnet: ≥Ø40mm, 2 to 4 points more are required. | ≤0.05mm |
Cylindricity |
Coordinate measuring machine (CMM) | Put the probe on 3 derived median points for each circular cross-section. | ≤0.05mm |
| V-block & dial gauge | Put the dial gauge at the starting point of the cylindrical item that is placed in the V-block, and rotate the item in contact with the dial gauge to the end point, thus determining the roundness. | ||
Profile of a surface |
Vision measuring machine | Measure the roundness of the R arc surface. | 0.1mm; 0.15mm for wire-electrode cutting |
We accept cash, wire transfer (T/T), and letter of credit (L/C), with wire transfer being the preferred method. For small orders, infrequent annual orders, or initial order, payment is required before shipment. Once the trust has been built, we can consider monthly billing.
It depends on the product's performance, size, shape, and quantity. In general, the lead time is around 30-40 days if we have readily available raw materials. For special specifications, grades, or large quantities of products, please confirm the lead time with our sales representative when placing your order.
To test the performance of soft magnetic materials, we follow these steps:
Our packaging methods mainly include standard cardboard box packaging and wooden crate packaging. We can also customize packaging methods according to customers' requirements. All packaging methods provide good protection, but the classification is based on customers' applications and the product size. For example, oversized products cannot be packed in cardboard boxes.
Contact our specialist to identify a custom solution for your application.
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