Radial Ring

Traditional Method

Traditionally, multi-pole ring magnets were created using multiple arc magnets glued to the assembly. While spinning, it was not uncommon for the adhesive material loosen and the magnet would dislodge itself. Also, the requirements for exact accuracy between all of the magnets in the ring shape to have the exact same physical and magnetic properties - thus many magnets would fail because of the high requirements. But because of the technological limitations, for years there was no good solution.


Modern Method

Now there is a better way to create circular magnets. By creating just one single magnet specifically designed for your application, we are able to provide your company a product that is stronger, more reliable, and more efficient. The magnets are multi-pole - which does not compromise the magnetic properties. Contact your Alpha Magnet sales representative to learn more about how this technology may help your company today!


Application

  • Stepper motors
  • Actuators
  • Magnetic bearings
  • Steering control motors
  • Magnetic clutch
  • Peripheral motors
  • Spindle motors


Advantages

  • Geometric precision
  • Variety of magnetic configuration
  • Homogeneous distribution of magnetic field
  • Design and assembly simplification
  • Precision of motor performances
  • Cost efficiency
  • Huge marketing potential

Magnetic Force


Regular Magnet


Radial Orientation


Magnetic Orientation

Multiple Poles

Skewed Magnetization


Single Pole

Radial Ring Grades

GradeRemance
Br(Gs)
Intrinsic Coercivity
Hcj(Oe)
Coercivity
Hcb(Oe)
Max Energy Product
(BH)max
Operating Temp.
°C
N35R≥11500≥12000≥950031-37(MGOe)80
N38R≥11800≥12000≥960032-40(MGOe)80
N42R≥12000≥12000≥970034-42(MGOe)80
N35MR≥11500≥13000≥950031-37(MGOe)100
N38MR≥11800≥13000≥960032-40(MGOe)100
N42MR≥12000≥13000≥970034-42(MGOe)100
N35HR≥11500≥14000≥960031-37(MGOe)120
N38HR≥11800≥14000≥970032-40(MGOe)120
N42HR≥12000≥14000≥980034-42(MGOe)120
N35SHR≥11500≥16000≥970031-37(MGOe)150
N38SHR≥11800≥16000≥980032-40(MGOe)150
N42SHR≥12000≥16000≥1000034-42(MGOe)150
N35UHR≥11500≥19000≥980031-37(MGOe)180
N38UHR≥11800≥19000≥1000032-40(MGOe)180


Recommended Dimensions

Diameter: 20–45 mm
Height: < 30 mm

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    Alpha Magnet
    1312 E. Orangethorpe Ave
    Fullerton, CA 92831
    p: 714-701-6780