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Guy's Magnets 20 mm x 5 mm x 8 mm C8 ferrite ring magnets

Guy's Magnets 20 mm x 5 mm x 8 mm C8 ferrite ring magnets

Item Code (SKU): RI20/5/8AC8
Minimum purchase price £3.120
Minimum purchase price: £3.120
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Technical Specifications

  • Outer Diameter: 20 mm (0.79")
  • inner Diameter: 5 mm (0.19")
  • Thickness: 8 mm (0.31")
  • Axially Magnetised through the thickness so that one flat face is north, the other is south
  • Weight: 11.54g
  • Grade: C8
  • Coating: None
  • Maximum Temp: 250°C / 482°F
  • Theoretical Maximum Pull: 1lb / 17oz / 458g
  • Calculated Max Vertical Hold-guidance only: 0.2lb / 3.4oz / 91g
    • Unsuitable for children under 5 – CHOKING HAZARD
    • Brittle, do not drop; do not allow these magnets to jump together or to an iron/steel surface - they will break, crack, chip or shatter.
    • Resultant chips and flakes will be sharp
    • Health and safety leaflet included with every purchase

These are most commonly used in MRO for motors, but can also be used for DIY holding applications and for crafting. Like all ferrite magnets, these offer excellent value for money when pull strength is not the most important factor. They have a high resistance to corrosion and demagnetisation, and can operate at higher temperatures which makes them ideal for holding steel during welding.

The pull is calculated using a mathematical formula and is, therefore, the theoretical maximum hold between one magnet and a mild steel plate. It does not take account of manufacturing tolerances, plating, plating thickness or variances in a mild steel plate. The vertical hold is based upon the calculated pull and is, therefore, only for guidance. Factors such as paint thickness, plasticised surfaces, movement and vibration are not taken into account.

Outer Diameter20 mm
Inner Diameter5 mm
Thickness8 mm
Pull1lb / 17oz / 458g
Vertical Hold0.2lb / 3.4oz / 91g
Max Temp250°C / 482°F
Weight0.01154 Kg
20 mm x 5 mm x 8 mm C8 ferrite ring magnets

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