Ring Ceramic Permanent Magnets Features:
Part No.: HS-FMR
Material: Ferrite/Ceramic magnet
Shape: ring
Grade:Y30,Y25, Y35, Y33, Y40, C5, C8, C1, etc.
Magnetic properties: Hcj,Hcb,BH,Br,BHmax,working temperature
Tolerance: ±2%
Plating : None
Operating Temp(Max).: 80℃ （176℉）
Maximum Br: 3850Guass
Magnetized Direction: Magnetized through thickness Other size and grade are available on request
Application:widely used in sensor,speakers,reed switches,motor,rotor,wind turbines/generators,AC/DC motors,drive motors,servo motors etc
Magnetization directions:by Axial or by radial
Dimension range of Ring Magnet Outer diameter: 5.0mm ~ 180mm Inner diameter : 2.0mm ~ 150mm Thickness: 1.0mm ~ 25mm
Tolerance of Hard Ferrite Ring Magnets Standard tolerance : +/-2% Also stricter tolerance are possible if specially requested. Surface coating of Ferrite Magnet Ferrite Magnet,also called Ceramic magnet, there is no surface coating. They do not Require surface treatment. Packaging and Delivery Packaging: Neutral box packaging, inner box , foam inside and other protection, to ensure safely of transportation. Delivery time: 8 ~ 20days, depend on customer’s order quantity. Ceramic or Ferrite magnets are made from Barium or Strontium Oxide, and Ferric Oxide. Strontium Ferrite’s are a powerful and cost effective option and are available in a wide range of shapes and sizes. Barium Ferrite is notably less powerful than Strontium Ferrite.
Ceramic magnets will operate at up to 250˚C before losing their magnetism. Ferrites are black in colour and are made with a ceramic carrier material. This makes them very hard and brittle. They are available as North/South as well as multi-pole orientations. In a N/S orientation the North Pole is on the largest flat face, with the South on the opposite face. Multi-pole magnets have a series of lines of alternative North’s and South’s across one face. The back of these is marked with a paint spot or a cast dimple. This orientation is suited to close contact and holding uses. We recommend these for craft uses.
| Model. No. | Dimensions (mm)D*d*T | Model. No. | Dimensions (mm)D*d*T |
| FMR-001 | D8 × d4 × 3 | FMR-002 | D10.2 × d6 × 9 |
| FMR-003 | D12 × d4 × 12 | FMR-004 | D12 × d4 × 24 |
| FMR-005 | D13 × d4.5 × 20 | FMR-006 | D14.6 × d8 × 12 |
| FMR-007 | D15 × d4.5 × 20 | FMR-008 | D15 × d4.5 × 28 |
| FMR-009 | D16 × d7 × 4 | FMR-010 | D18 × d5 × 8 |
| FMR-011 | D18 × d7 × 6 | FMR-012 | D18 × d6 × 24 |
| FMR-013 | D18 × d6 × 40 | FMR-014 | D18.3 × d6 × 32 |
| FMR-015 | D19 × d6 × 30 | FMR-016 | D21 × d7 × 32 |
| FMR-017 | D22 × d8 × 45 | FMR-018 | D23.4 × d11 × 8 |
| FMR-019 | D23.4 × d12 × 9 | FMR-020 | D25 × d8 × 50 |
| FMR-021 | D25.6 × d17 × 20 | FMR-022 | D26 × d10 × 9 |
| FMR-023 | D28 × d8 × 8 | FMR-024 | D30 × d10 × 60 |
| FMR-025 | D32 × d18 × (5-8) | FMR-026 | D35 × d18 × (6-8) |
| FMR-027 | D39 × d22.5 × (7-10) | FMR-028 | D40 × d19 × (6-10) |
| FMR-029 | D40 × d22 × (6-10) | FMR-030 | D45 × d19(22) × (6-10) |
| FMR-031 | D50 × d22 × (6-12) | FMR-032 | D50 × d24 × (6-12) |
| FMR-033 | D55 × d24 × (6-12) | FMR-034 | D55 × d26 × (6-12) |
| FMR-035 | D60 × d24 × (8-16) | FMR-036 | D60 × d30 × (8-16) |
| FMR-037 | D60 × d32 × (8-16) | FMR-038 | D65 × d32 × (6-16) |
| FMR-039 | D70 × d32 × (8-18) | FMR-040 | D70 × d45 × (8-18) |
| FMR-041 | D71.1 × d32.5 × 15 | FMR-042 | D72 × d32 × (8-18) |
| FMR-043 | D75 × d32 × (10-15) | FMR-044 | D75 × d40 × (10-15) |
| FMR-045 | D80 × d32 × (10-20) | FMR-046 | D80 × d40 × (10-20) |
| FMR-047 | D80 × d60 × (10-20) | FMR-048 | D85 × d32 × (8-20) |
| FMR-049 | D85 × d44 × (8-20) | FMR-050 | D85 × d45 × (8-20) |
| FMR-051 | D90 × d32 × (10-18) | FMR-052 | D90 × d35 × (10-18) |
| FMR-053 | D90 × d45 × (10-18) | FMR-054 | D90 × d50 × (10-18) |
| FMR-055 | D100 × d45 × (12-20) | FMR-056 | D100 × d50 × (12-20) |
| FMR-057 | D100 × d60 × (12-20) | FMR-058 | D110 × d60 × (15-20) |
| FMR-059 | D110 × d62 × (15-20) | FMR-060 | D119 × d56 × (14-20) |
| FMR-061 | D119 × d60 × (14-20) | FMR-062 | D116 × d56.8 × (15-20) |
| FMR-063 | D116 × d60 × (15-20) | FMR-064 | D120 × d45 × (12.5-20) |
| FMR-065 | D120 × d60 × (12.5-20) | FMR-066 | D126 × d60 × (12.5-20) |
| FMR-067 | D126 × d65 × (12.5-20) | FMR-068 | D128.3 × d58.8 × (15-20) |
| FMR-069 | D133.3 × d59 × (15-20) | FMR-070 | D135 × d60 × (15-20) |
| FMR-071 | D140 × d62 × (12.5-20) | FMR-072 | D140 × d65 × (12.5-20) |
| FMR-073 | D140 × d75 × (12.5-20) | FMR-074 | D145 × d70 × (20-24) |
| FMR-075 | D145 × d75 × (20-24) | FMR-076 | D156 × d60 × (20-25) |
| FMR-077 | D156 × d80 × (20-25) | FMR-078 | D165 × d86.4 × (15-25) |
| FMR-079 | D169 × d85 × (20-25) | FMR-080 | D180 × d80 × (20-25) |
| FMR-081 | D180 × d85 × (20-25) | FMR-082 | D180 × d95 × (20-25) |
| FMR-083 | D190 × d89 × (20-25) | FMR-084 | D190 × d90 × (20-25) |
| FMR-085 | D200 × d86 × (20-25) | FMR-086 | D211 × d89 × (20-25) |
| FMR-087 | D210 × d110 × (20-25) | FMR-088 | D220 × d110 × (20-25) |
The above size is suitable for customer’s Magnetic Grade, Dimension tolerance: D ± 2%, d ± 1.5%, h ±0.15mm
Grade of Ceramic Magnet
| M Material |
Br | HcB | HcJ | (BH)max | ||||
| mT | KG | KA/m | KOe | KA/m | KOe | KJ/m3 | MGOe | |
| C1 C5 C7 C8A C8B C9 C10 C11 |
230 380 340 385 420 380 400 430 |
2.3 3.8 3.4 3.85 4.2 3.8 4.0 4.3 |
148 191 258 235 232 280 288 200 |
1.86 2.4 3.23 2.95 2.913 3.516 3.617 2.512 |
258 199 318 242 236 320 280 204 |
3.5 2.5 4.00 3.05 2.96 4.01 3.51 2.56 |
8.36 27 21.9 27.8 32.8 26.4 30.4 34.4 |
1.05 3.4 2.75 3.5 4.12 3.32 3.82 4.32 |
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