Pack of 1 - single 12 x 2 mm N42 neodymium disc magnet on a half-inch reference grid

12mm x 2mm N42 Neodymium Disc Magnets

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$3.52
$3.52
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Pack of 1 - single 12 x 2 mm N42 neodymium disc magnet on a half-inch reference grid
  • Pack of 1 - single 12 x 2 mm N42 neodymium disc magnet on a half-inch reference grid
  • Overview panel for 12 x 2 mm N42 neodymium disc magnets - 1500 g calculated pull to steel at zero gap, NiCuNi plating, axial magnetisation
  • Stacked rows of 12 x 2 mm N42 neodymium disc magnets shown at real size
  • Infographic - calculated pull reference of 1500 g for a 12 x 2 mm N42 disc magnet on clean flat steel with zero gap
  • Rows of 12 x 2 mm neodymium disc magnets stacked into long columns on a dark background
  • Angled view of 12 x 2 mm neodymium disc magnets stacked in parallel rows on a dark background
  • Wide block of 12 x 2 mm neodymium disc magnets stacked in parallel rows
  • Stacked rows of 12 x 2 mm neodymium disc magnets arranged side by side on a dark background
  • Long stacked rows of 12 x 2 mm neodymium disc magnets viewed end-on on a dark background
  • Magnet safety warning panel: swallowing two or more magnets can cause serious internal injury; keep away from children and medical devices, handle and store with care
  • Infographic - separating small disc magnets safely: slide sideways, keep the stack controlled, mind loose steel and blades
  • Infographic - how diameter and thickness affect disc magnet holding strength and how to read the D x H size format
  • Size chart comparing 2 x 1 mm, 3 x 2 mm and 5 x 3 mm disc magnets on a cutting mat with calculated zero-gap pull of 50 g, 210 g and 650 g
  • Infographic explaining magnet holding force: full pull at direct contact, weaker shear under sideways load, reduced hold across a gap
12mm x 2mm N42 Neodymium Disc Magnets
Hobby Heaven

12mm x 2mm N42 Neodymium Disc Magnets

$3.52
$3.52
Shipping calculated at checkout.
Pack Size
Number of packs

In stock · same-day dispatch before 3pm

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DWG · Product Information

PROJ: MAG/D12X2/1 · SHEET 2 / 4

View · Overview

Product overview

These 12 × 2 mm N42 neodymium discs are the widest low-profile option in the range: a broad contact face with only 2 mm of magnet thickness. The NiCuNi coating protects the surface during normal handling, while axial magnetisation places the poles on the two flat faces for clean, repeatable alignment.

This size is aimed at closures and removable fixings where width is available but drilling depth is limited. It suits box and display-case lids, lightweight doors, removable panels and broad scenery sections that need to sit flat rather than pivot around a small contact point. Its 1,500 g pull is a calculated, zero-gap reference figure for comparison between sizes; the sideways shear estimate is approximately 220 g. Compared with moving up to a 15 × 3 mm disc, the 12 × 2 mm keeps the recess shallower and is easier to package into thin panels or low-profile assemblies.

For timber or plastic, use a 12 mm bit and cut a flat-bottomed recess 2.2 mm deep so there is room for adhesive without leaving the magnet proud. In a 3D-printed part, specify a 12.1 mm hole. Seat the disc level with the surface and check polarity before bonding the second side of the closure.

Notes · Q & A

Which magnet size should I choose for miniatures?

A 2×1 mm disc suits infantry weapon swaps, while 3×1 mm is a practical step up for arms and small components. Sizes around 3×2 to 5×2 mm work well for basing and larger parts, with 5×3 mm and above better suited to vehicles, large models and army transport. Each listing includes a calculated pull figure in grams so you can compare sizes on the same basis.

What does the N42 magnet grade mean?

The grade describes the magnetic material: at identical dimensions, a higher number generally produces more pull. N52 is typically around 20–25% stronger than N42 at the same size, but increasing the magnet's diameter or thickness usually makes a larger practical difference than changing grade alone. Our range is clearly specified as N42.

How do I keep the polarity consistent?

Before separating the stack, mark one face with a permanent marker and use that mark as your polarity reference. Dry-fit every pair before applying adhesive, and glue the two halves while the magnets are still attracting each other in the intended orientation. Reversing one magnet is one of the most common magnetisation mistakes.

What size hole should I drill for a magnet?

Use a drill matching the magnet diameter; for a designed 3D-printed socket, allow roughly 0.1 mm extra diameter. Make the recess approximately the magnet thickness plus 0.2 mm for adhesive so the face can sit level with the surrounding surface. CA adhesive is suitable for fixing these magnets into plastic, resin or metal parts.

How should neodymium magnets be handled safely?

Swallowing two or more magnets can cause serious internal injury, so keep loose magnets away from children and use them only for adult hobby work. Neodymium magnets are also brittle and may chip if allowed to snap together. Bring them together slowly from the edge rather than letting their flat faces strike each other.

Notes · Logistics

Shipping

Orders placed before 3pm (Mon–Fri) are dispatched the same day. UK delivery is by Royal Mail 24 Tracked. Free UK delivery on orders over £70. International delivery available via Royal Mail International Tracked or courier.

Returns

If you're not happy with your purchase, contact us within 30 days for a full refund or exchange. Items must be unused and in original packaging.

Table · Specification

Technical specifications

Product details
Brand
Hobby Heaven
Product code
MAG/D12X2/1
Type
Accessories
Made in
China
Dimensions & contents
Diameter
12 mm
Thickness
2 mm
Weight per magnet
1.72 g
Magnetic properties
Grade
N42
Pull to steel (calculated, zero gap)
1500 g
Pull to steel
14.71 N
Magnet-to-magnet pull
1500 g
Shear resistance (estimate)
220 g
Magnetisation
Axial
Max working temperature
80 °C
Coating
Nickel-Copper-Nickel (NiCuNi)
Usage & compatibility
Drill bit
12 mm
Hole in 3D prints
12.1 mm
Recess depth
2.2 mm
Size comparison
12 mm — two-thirds of a 5p coin (18 mm)
Related sizes
Also consider
10mm x 2mm N42 Neodymium Disc Magnets
8mm x 3mm N42 Neodymium Disc Magnets
10mm x 3mm N42 Neodymium Disc Magnets
15mm x 3mm N42 Neodymium Disc Magnets

Product

12mm x 2mm N42 Neodymium Disc Magnets

Code (proj)

MAG/D12X2/1

Brand

Hobby Heaven

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