Neodymium Pots

NdFeB Pot Magnet

NdFeB Pot Magnets are best for small sized magnetic products with maximum pull strength (ideally when in direct contact with ferromagnetic e.g. mild steel surfaces).

We currently offer four types of Pot Magnet that contain NdFeB magnets:-

• NdFeB Pot Magnet with External Threaded Stud / Boss Mounting
• NdFeB Pot Magnet with Internal Threaded Mounting (Deep Pot)
• NdFeB Pot Magnet with Countersunk Mounting (Shallow Pot)
• NdFeB Pot Magnet with Through Hole Mounting

We offer some of the designs as rubber coated magnets to provide extra friction to reduce (this is at the expense of the maximum possible pull force because the rubber introduces an ‘effective’ air gap into the magnetic circuit). The rubber coated pot magnets allow less slippage on vertical surfaces. Standard Pot Magnets typically require only 20% of the maximum possible pull force to start a slip (shear) – the actual value is affected by the levels of friction present.

The actual pull force achieved is dependent on the surface that is being clamped onto (material type, thickness, flatness, friction levels, etc), its quality (e.g. rust free), its size (thickness plus total surface area), etc. Clamping onto thin sheet (2mm or less for example) generally results in a reduced clamping force as the thin ferromagnetic sheet magnetically saturates. Clamping through an ‘effective air gap’ also significantly reduces the pull force (e.g. clamping onto a curved surface). As the ambient temperature increases, the clamping force reduces (it does return provided the magnet is not taken too hot e.g. +80 degrees C for standard NdFeB, otherwise a permanent weakening due to demagnetisation occurs).

There are many applications for NdFeB Pot Magnets, mainly in applications where a strong clamping force is required. Applications include Point of Sale, window dressing, door / cupboard and gate clamps, false ceiling clamps, signs and banners, torque limited seals, jigs and fixtures, lighting holders, marketing and exhibition displays, retrieval magnets, industrial fixings, etc.

Although we show a range of stocked sizes for each Pot Magnet type, we do offer a wider range of Pot Magnets (including Pot Magnets using different magnet materials e.g. Ferrite, Alnico and SmCo plus other styles of Pot Magnet e.g. limpet, internal threaded stud and threaded through hole). If this is of interest, please ask us for our Pot Magnet brochure. We also produce made to measure (custom) Pot Magnets to meet specific requirements. Please get in touch if you would like a price for custom-made Pot Magnets.

NdFeB Pot Magnet with External Threaded Stud

The NdFeB Pot Magnet with External Threaded Stud / Boss Mounting can be screwed into M5, M6 and M8 tapped 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 NdFeB Pot Magnet with External Threaded Stud / Boss Mounting offers maximum clamping forces from 6kg up to 43kg. Bespoke units can be made upon request.

Size	Stud Size	Total height	Grade	Max Operating Temperature	Coating type	Max Pull(kg)
16mm Ø x 4.5mm	M5 x 10mm	14.5mm	N38	+80 deg C	Zinc plated	6.00
25mm Ø x 7mm	M6 x 10mm	17mm	N38	+80 deg C	Zinc plated	27.00
32mm Ø x 7mm	M6 x 10mm	17mm	N38	+80 deg C	Rubber plated	16.00
35mm Ø x 15mm	M6 x 25mm	40mm	N38	+80 deg C	Zinc plated	40.00
60mm Ø x 3mm	M8 x 17mm	20mm	N38	+80 deg C	Rubber plated	19.50
80mm Ø x 3mm	M8 x 17mm	20mm	N38	+80 deg C	Rubber plated	43.00

NdFeB Pot Magnet with Internal Threaded Mounting

The NdFeB Pot Magnet with Internal Threaded Mounting is also known to many as a Deep Pot Magnet. It has M3, M4, M5, M6 and M8 internal threads and offers maximum clamping forces from 1kg up to 50kg. We can produce other sizes upon request.

Size	Hole Size	Hook Supplied	Grade	Max Operating Temperature	Coating type	Max Pull (kg)
6mm dia x 6mm	M3 tapped hole	No	N38	+80 deg C	Chrome plated	1.00
15mm dia x 15mm	M4 tapped hole	Yes, removable	N38	+80 deg C	Chrome plated	13.70
18.9mm dia x 8mm	M5 tapped hole	No	N38	+80 deg C	Chrome plated	9.20
20mm dia x 16mm	M4 tapped hole	Yes, removable	N38	+80 deg C	Chrome plated	19.60
25mm dia x 8mm	M5 tapped hole	No	N38	+80 deg C	Chrome plated	12.00
32mm dia x 8mm	M5 tapped hole	No	N38	+80 deg C	Chrome plated	15.40
40mm dia x 15mm	M6 tapped hole	No	N38	+80 deg C	Chrome plated	50.00
50mm dia x 40mm	M8 tapped hole	No	N38	+80 deg C	Chrome plated	50.00

NdFeB Pot Magnet with Countersunk Mounting

The NdFeB Pot Magnet with Countersunk Mounting is easily fixed in place with a M4 or M5 countersunk screw. It has a maximum pull of between10kg and 50kg. Custom sized Pot Magnets can be made upon request.

Size	Hole Size	Countersunk hole	Grade	Max Operating Temperature	Coating type	Max Pull (kg)
20mm dia x 6mm	D4.5mm	Yes	N38	+80 deg C	Zinc plated	10.00
25mm dia x 8mm	D5.4mm	Yes	N38	+80 deg C	Nickel plated	14.00
32mm dia x 7mm	D5.5mm	Yes	N38	+80 deg C	Zinc plated	35.00
40mm dia x 8mm	D5.5mm	Yes	N38	+80 deg C	Zinc plated	50.00

NdFeB Pot Magnet with Through Hole Mounting

The NdFeB Pot Magnet with Through Hole Mounting contains a NdFeB ring magnet within a plated steel casing. A cap screw can be used to securely clamp the pot magnet in place (clamping onto steelwork rather than the magnet) – the holes are 3, 5 and 6mm in diameter.

Other sizes of Pot Magnet can be produced upon request.

Size	Hole Size	Keeper supplied	Grade	Max Operating Temperature	Coating type	Max Pull (kg)
20mm dia x 4mm	D3.1mm	Yes, D20mm x 2mm with 3mm csk hole	N35H	+120 deg C	Zinc plated	11.00
25mm dia x 7mm	D6mm	No	N38	+80 deg C	Zinc plated	18.00
29mm dia x 3mm	D6mm	No	N38	+80 deg C	Rubber plated	8.00
32mm dia x 7mm	D5mm	No	N38	+80 deg C	Nickel plated	33.00
40mm dia x 8mm	D5mm	No	N38	+80 deg C	Zinc plated	50