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Neodyimium hook magnets
Block vs. Disc Magnets – Which Shape Is Best for Your Project?
Magnets come in a wide range of shapes, but block and disc magnets are among the most popular due to their versatility and strength. In this article, we’ll compare both forms, show typical applications, and list common sizes to help you choose the best option for your project.
What Is a Block Magnet?
Block magnets have a rectangular, square, or cube-like shape. Their geometry distributes magnetic force evenly across flat surfaces, making them ideal for flush mounting.
Common applications:
- Furniture construction (e.g., hidden closures)
- Mechanical engineering
- Tool holders or wall mounts
- Model building
Example sizes for neodymium block magnets:
- 10 × 5 × 2 mm – for compact craft projects
- 20 × 10 × 5 mm – a versatile size for general use
- 40 × 20 × 10 mm – strong enough for industrial use
- 60 × 30 × 15 mm – extremely powerful for heavy-duty applications
What Is a Disc Magnet?
Disc magnets are round and flat, with the magnetic force concentrated along the vertical axis. Their shape makes them ideal for cylindrical slots or centered force applications.
Common applications:
- Sensors and electronics
- Magnetic stirrers
- Packaging and closures
- Craft and DIY projects
Example sizes for neodymium disc magnets:
- Ø 6 × 2 mm – for small clasps and light fixtures
- Ø 10 × 3 mm – an all-purpose size
- Ø 20 × 5 mm – for stronger holding power
- Ø 30 × 10 mm – very strong, used in industrial setups
Comparison Table: Block vs. Disc Magnets
| Feature | Block Magnet | Disc Magnet |
|---|---|---|
| Shape | Rectangular / cube-shaped | Round / cylindrical |
| Magnetic force | Spread across a flat surface | Focused along vertical axis |
| Mounting surface | Best for flat surfaces | Best for round recesses |
| Typical use | Furniture, machines, tool holders | Sensors, packaging, electronics |
| Popular size | e.g., 20 × 10 × 5 mm | e.g., Ø 10 × 3 mm |
Conclusion: Which Magnet Should You Choose?
Choose block magnets if your application requires broad, even contact with a surface – for example, in furniture design or tool storage. Choose disc magnets when you need a round shape or centralized pull force, such as for electronics or closures.
Both shapes can be incredibly strong when made of neodymium, even in small sizes. Your project goals and design constraints will determine the best shape and size.