Definition and Principle
- A magnetic rod, sometimes called a magnetic bar, is a powerful cylindrical magnet. It is made from strong permanent magnet materials like neodymium (NdFeB) or samarium cobalt (SmCo). It is used to filter fine magnetic particles and impurities out of liquids, powders, and other materials in industrial applications. The rod generates a high magnetic field on its surface to attract ferrous contaminants as the product flows around it.
Structure and Design
- Permanent Magnetic Cores: Sintered neodymium magnets of grade N42 or stronger are commonly used, offering good magnetic performance. Cast SmCo magnets are an option for applications requiring better temperature resistance. The magnetization can be axial, aligning the magnetic poles along the rod's length for maximum holding strength, or radial for specialized capture needs.
- Protective Shells: Non - magnetic stainless - steel tubing, such as grades 304 and 316, is used to contain the brittle magnetic material and concentrate the magnetic field outward.
- End Closures: End caps are used to seal the shell and prevent interior oxidation and corrosion. Welded, threaded, and flanged options are available, and special materials or plating can be used to resist chemical attack in harsh environments.
- Central Mounting Plates: Internal steel plates lined with magnet blocks are used in large - diameter rods or when wider spacing between magnets is needed to achieve greater field strength. The mounting plates may have partial cuts to "shape" the fields for specialized applications.
- Surface Treatments: Electroless nickel plating and other treatments provide hardness and lubricity to prevent product buildup on the rods over time. PTFE coating can also be applied for non - stick performance.
Applications
- Food/Beverage Processing: Removing metal fragments from liquids or powders to prevent machinery damage or food contamination.
- Plastics Manufacturing: Eliminating iron particles from resins and pellet streams to avoid defects in extruded or molded parts.
- Pharmaceuticals: Protecting equipment and improving product purity by extracting ferrous contamination.
- Coal Handling: Recovering fragments of conveyor - belt steel ripped by heavy loads.
- Mineral Processing: Collecting "tramp iron" debris from crushed ores to prevent impact/compression equipment failure.
- Recycling: Separating steel cans and containers from non - ferrous materials for efficient material separation.
- Water Filtration: Removing iron corrosion products and treatment chemicals from supply lines.
Selection Considerations
- Size: Diameters typically range from 0.5 - 4 inches to fit pipeline or chute dimensions, and lengths are usually from 4 - 60 inches. Longer rods are suitable for larger cross - sections to cover the entire flow area.
- Magnetic Strength: The surface field strength is related to the grade of the magnet used and should be scaled to the separation goals. It can range from a minimum of ~ 4500 gauss to up to 15,000 + gauss.
- Material Selection: Stainless steel or specialty alloys are used for the rod and end caps to withstand exposure to the product being processed.
Characteristics
- The standard cylindrical magnetic rod usually has a diameter of 15 mm, and the length can be customized according to customer requirements, with the longest reaching 5000 mm. Square or other magnetic rods of different shapes and sizes can also be provided.
- It uses 304 or 316L seamless stainless - steel pipes, and the surface can be polished to meet the special requirements of the food, pharmaceutical, and other fields.
- The standard working temperature is ≤ 80 ℃, and under special requirements, the maximum working temperature can reach 350 ℃.
- There is a diversified design at both ends, such as pointed ends, threaded holes, studs, etc.
- It is possible to produce magnetic rods with different surface magnetisms to meet customer needs, and the maximum surface magnetism of the magnetic rod can reach 15000 Gs.
Fishing magnet-Double Sided Eyebolts
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Specification
|
Model |
D |
h |
H |
L |
d |
d1 |
M1 |
Weight |
Breakaway |
|
YHMT48-2 |
48 |
18 |
58 |
83 |
20.3 |
35.5 |
M8 |
311 |
80 |
|
YHMT60-2 |
60 |
22 |
66 |
95 |
20.3 |
35.5 |
M8 |
532 |
120 |
|
YHMT67-2 |
67 |
25 |
75 |
102 |
25.5 |
43.8 |
M10 |
842 |
150 |
|
YHMT75-2 |
75 |
25 |
77 |
110 |
25.5 |
43.8 |
M10 |
967 |
200 |
|
YHMT94-2 |
94 |
28 |
85 |
129 |
25.5 |
43.8 |
M10 |
1600 |
300 |
|
YHMT116-2 |
116 |
32 |
92 |
160 |
29 |
49.1 |
M12 |
2745 |
400 |
|
YHMT136-2 |
136 |
34 |
92 |
190 |
29 |
49.1 |
M12 |
3932 |
600 |
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