External Threaded Stud
An Introduction to External Threaded Stud
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Pot Magnets offer an increase in clamping force onto ferromagnetic materials because the magnets are inside a ferromagnetic casing (Ni or Zinc plated mild steel) which gives an improved magnetic circuit. This allows high clamping forces to be achieved with minimal size.
The Pot Magnet with External Threaded Stud / Boss Mounting can be screwed into M4, M5, M6 and M8 holes. Or the Pot Magnet with External Threaded Stud / Boss Mounting can be put into a standard hole and a nut can be used to clamp it in place.
The Pot Magnet with External Threaded Stud / Boss Mounting exists with Ferrite and NdFeB magnets within the Pot assembly. The ferrite versions can be used up to +250 degrees C but may start to show some signs of weakening when used in sub-zero conditions (as ferrite can demagnetise when taken below e.g. -10 to -20 deg C but the ferromagnetic casing and the design provides additional protection against demagnetisation). NdFeB versions can be used up to +80 deg C and are fine for sub-zero applications.
Some versions have an additional rubber coating. Although this rubber coating introduces an ‘effective air gap’ which reduces the maximum clamping force, the additional friction provided allows for the magnets to be clamped on a vertical surface with extra friction to minimise sliding (the shear force required to slide a pot magnet along a clamped surface is approximately 1/5th of that of the direct pull force required to pull the magnet perpendicular to the clamped surface; using a rubber coated magnet improves the shear force).
The Pot Magnet with External Threaded Stud / Boss Mounting range offers maximum clamping forces from 1.5kg up to 43kg.
The Pot Magnet with External Threaded Stud / Boss Mounting is dimensioned such that the basic pot size is given and then the size of the stud is given - the total height is the height of the main pot magnet plus the length of the stud e.g. E1001 has a total height of 17mm.
It is possible to produce bespoke Pot Magnets with External Threaded Stud / Boss Mounting but a minimum order quantity may be required (the minimum quantity depends on the size, shape and performance required). We can send our extended range brochure upon request.
How to buy External Threaded Stud
| Part No. | Size | Grade | Pull (kg) |
| EP1001 | 15mm Ø x 5mm c/w M4 x 12mm Stud | Ferrite C5 - Zinc Plated | 1.50 |
| E1002 | 23mm Ø x 7mm c/w M5 x 13mm Stud | Ferrite C5 - Zinc Plated | 3.50 |
| E1003 | 32mm Ø x 7mm c/w M5 x 16mm Stud | Ferrite C5 - Zinc Plated | 8.00 |
| E1004 | 63mm Ø x 14mm c/w M8 x 13mm Stud | Ferrite C5 - Zinc Plated | 35.00 |
| E1005 | 16mm Ø x 4.5mm c/w M5 x 10mm Stud | NdFeB N38 - Zinc Plated | 6.00 |
| E1006 | 25mm Ø x 7mm c/w M6 x 10mm Stud | NdFeB N38 - Zinc Plated | 27.00 |
| E1007 | 32mm Ø x 7mm c/w M6 x 10mm Stud | NdFeB N38 - Rubber Coated | 16.00 |
| E1008 | 35mm Ø x 15mm c/w M6 x25mm Stud | NdFeB N38 - Zinc Plated | 40.00 |
| E1009 | 65mm Ø x 8mm c/w M8 x 17mm Stud | NdFeB N38 - Rubber Coated | 19.50 |
| E1010 | 88mm Ø x 8mm c/w M8 x 15mm Stud | NdFeB N38 - Rubber Coated | 43.00 |
| E1041 | 95mm Ø x 12mm c/w M10 x 15mm Stud | Ferrite C5 Rubber Coated | 20 kgs |
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