Nanjing Huajin Magnet Co., Ltd.
Nanjing Huajin Magnet Factory
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Permanent Neodymium Ring Magnets / Donut Magnets / Circular Magnets With Straight Hole And Countersunk Screw
Ring Magnet
Ring Magnets. A thin flat circular magnet where the thickness does not exceed the diameter and there is a hole through the center. Ring magnets are commonly used when a mechanical attachment method is needed to secure the magnet.
Ring magnets are used in a variety of applications, from science experiments to medical equipment, because of the versatility of their shape and their ability to work with other components, like rods or tubes. Ring magnets have a unique polarization because the north and south poles can be segmented in a variety of ways, but always alternate around the ring.
Product Description:
Payment term :T/T, L/C, PayPal, Western
Grade : N35-N52, N35M-N50M, N35H-N48H, N33SH-N45SH, N30UH-N35UH, N30EH-N35EH
Coating: Zinc&Nickel&Color Zinc
Packing : Carton & wooden & pallet & by customer requirements.
Delivery time :3-10 days after order confi Union
Payment term: T/T, L/C, PayPal, Western Union
Trade term :EXW, FOB, F&C, FCR, CIF ect.
Certifications :ISO9001,SGS
Tolerance: +/-0.05mm
MOQ: 100PCS
Usage: Industry, food industry, Medical, Clothes, ect.
Material: Neodymium-iron-boron
The production process:
Sintering-Machining-Coating-Magnetizing-Packing
Grades of Neodymium Magnet
N35, N38, N42, N38SH...
The temperature ratings are standard (no designation) - M - H - SH - UH - EH. You find the temperature rating of each grade on our specifications of neodymium magnets page.
Coating
Neodymium magnets are a composition of mostly Neodymium, Iron and Boron. If left exposed to the elements, the iron in the magnet will rust. To protect the magnet from corrosion and to strengthen the brittle magnet material, it is usually preferable for the magnet to be coated.
Strength
Neodymium magnets are over 10x stronger than the strongest ceramic magnets. If you are currently using ceramic magnets in your project, you could probably use a much smaller neodymium magnet and have greater holding force.
Applications of Sintered NdFeB Magnets
| · Automotive Starters | · Microphone Assemblies |
| · Computer Rigid Disc Drives | · Particle Accelerators |
| · DC Motors | · Printers |
| · Headphone | · Relays |
| · Halbach Arrays | · Servo Motors |
| · Linear Actuators | · Stepper Motors |
| · Linear Motors | · Switches |
| · Loud Speakers | · Undulators |
| · Magnetic Bearings | · Vacuum Deposition |
| · Magnetic Couplings | · Voice Coil Motors (VCM) |
| · Magnetic Separators | · Wind Turbines |
Advantage of Magnet
High adhesive force on small area
All-rounder among neodymium magnets
Many special designs available: self-adhesive, waterproof, countersunk