NST part 4 pole sintered ferrite rotor magnetic ring dimensions

In small motors, sensors, and home appliance drive systems, 2-pair pole (4-pole) sintered ferrite rotor magnetic rings are commonly used. These rings typically employ sintered ferrite materials (such as Y30, Y10, etc.) and form a 4-pole magnetic field structure through external or internal multi-pole magnetization. This design meets the requirements for stable motor operation and cost control. Below is a summary of selected 2-pair pole (4-pole) sintered ferrite rotor magnetic ring dimensions from our company for reference during selection.

D14.4*d8*6mm/Radial 4-pole/Isotropic ferrites

D16*d7.5*20.3mm/Outer diameter 4-pole/Y30

D20*d10*27mm/4-pole outer diameter/Y30

D12.4*d5.5*25mm/4-pole outer diameter/Y30

D10*d4.5-5.1*4mm/4-pole outer diameter

D20*d9*27mm/4-pole outer diameter magnetization

D25*d12.5*3mm/Flat 4-pole

D12.3*d5*27mm/Radial Outer Diameter 4-pole

D9.5*d5.7*3.5mm/Flat 4-pole

D10*d4.3*15mm/Radial Outer Diameter 4-pole

D12.4*d5.5*20mm/Outer Diameter 4-pole

D16*d7.5*20.3mm/4-pole

4-pole radial sintered ferrite for rotors

D20.4*d9.5*27mm/Outer Diameter 4-pole

D25*d12*30mm/Outer Diameter 4-pole

D35.8*d15*50mm/Outer Diameter 4-Pole

D23.5*d13*18mm/Outer Diameter 4-Pole/Y30BH

D50*d39*3.5mm/Axial 4-Pole

D55*d22*7mm/Axial 4-Pole/N-Pole Marking

D8*d4.65*3mm/Axial 4-pole/Single-side painted

D9.5*5.5*3.5mm/Single-side 4-pole/985Gs

D13*d4.7*27mm/Outer diameter 4-pole

D20.5*7.5*4.5mm/Axial 4-pole/Small R corners

D20.5*7.5*3mm/Axial 4-pole/Chamfered

D10*4*4mm/Y10/Radial 4-pole

D12.4*d4.3*27mm/Radial Outer Diameter 4-pole

D20*d10.5*27mm/Radial Outer Diameter 4-pole

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In actual motor design, the size of the rotor magnetic ring is usually matched based on the stator size, air gap, speed, and torque requirements. Therefore, many specifications require customized production. Whether you are looking for off-the-shelf products or customization, you can contact us for a quote.