FAQ - Frequently Asked Questions

Which magnets do I use for magnet fishing?

Table of Contents
Magnet fishing, similar to Geocaching, has become a veritable sport. The objective is to retrieve metal objects from well shafts, rivers, lakes etc using magnets. With the help of our magnets, customers have salvaged age-old cannonballs, but also rusty bicycles, nails and more.
We are pleased to introduce you to the magnets best suited for the task, according to our experience.

Suitable magnets

The treasure hunter magnet in action
The treasure hunter magnet in action
Of our magnets, the following are especially well suited for magnet fishing:

A pot magnet is a magnet that has been embedded in a steel pot. The steel pot increases the adhesive force of the magnet when making direct contact with a thick iron surface. In contrast, neodymium magnets without pots have a stronger adhesive force at a distance. You can find more information about pot magnets in our FAQ pot magnet characteristics.

Make your own retrieval magnet

Materials for a fishing magnet
Materials for a fishing magnet
You can build your own fishing magnet with very little effort. For example, you could use:
  • A countersunk pot magnet, here we used the CSN-60
  • A countersunk screw with hexagon socket, M8 thread, total length 30 mm
  • A ring nut, M8 internal thread
First, push the screw through the hole in the pot magnet. Now you only need to thread the ring nut onto the screw.


Those who find that the adhesive force of a single magnet is not powerful enough for magnet fishing can, with a little skill, build a “slightly” bigger retrieval magnet. In the customer application Magnet fishing in XL we gathered information on the necessary materials and how to proceed. And if you feel this is a little too ambitious, you can instead find instructions for making a magnetic fishing rod with our strongest ring magnet R-60-06-30-N.

Attaching a rope to the fishing magnet

There are many good knots for tying a rope to the fishing magnet. The important thing is, that the knot holds firm. After all, it would be a pity, if your magnet takes a dive into the water without the rope.
One option is the Palomar knot, which is shown in the pictures below. This knot is especially popular with anglers because it has a high knot strength. In the following pictures, we will show you how to attach the rope to your fishing magnet using this method. Those who would like to watch a video on the topic will find it in this video tutorial.
Step 1
Step 1
Step 2
Step 2
Step 3
Step 3
Step 4
Step 4

Tips for fishing with magnets

Required adhesive force

Please keep in mind: The adhesive force noted for the magnets is the maximum force under ideal conditions. You will need a very strong magnet, if the item to be retrieved is lacquered or painted, has a rough or uneven surface or is not made from pure iron (see specific FAQ about adhesive force). In addition, there is the water pressure that has to be overcome during retrieval. It is much higher than air pressure. If in doubt, always use magnets with an adhesive force of at least 30 kg for magnet fishing.

Storage

Magnets used for magnet fishing must be stored safely. With such a strong adhesive force it is not uncommon for these magnets to inadvertently attach to a ferromagnetic surface while being transported in a car or while being improperly stored. That is why these magnets need to be shielded when not in use. The medium plastic case filled with cubed foam, for example, is suitable for this purpose.

Corrosion

If you repeatedly expose a neodymium magnet to water and without protection, it will eventually start to rust. You should therefore thoroughly dry the magnet after each use. You can also treat the magnet with a waterproof lacquer to provide some protection.
Another option: Our strongest ferrite ring magnet is rust-resistant – but don’t expect any miracles with an adhesive force of 16 kg.

Chipping, breaks

Collisions between strong magnets and coarse metal objects will inevitably lead to damage of the magnet coating, to a point where it could even chip off. Magnets can also break during heavy collisions because they are very brittle. Unfortunately, in combination with the corrosion issues, you can expect having to replace the fishing magnets every now and then.

Safety distances

The magnetic strips of credit and EC cards will be quickly demagnetised by magnets of this size and will not work afterwards. Therefore, when fishing with magnets, please keep your wallet away from these magnets. People with pacemakers and/or hearing aids should be especially careful as well. You can find further information on this topic in our FAQ about safety distances.

Additional safety information

  • Be extremely cautious in areas where unexploded bombs or other munitions may be found! Should you come across explosives while magnet fishing, do not touch them and call the police.
  • If you really do find a treasure, you are usually not allowed to keep it - follow the legal regulations!
  • Magnets used for magnet fishing do not belong in children’s hands. Store your retrieval magnet out of reach for children.
  • The stronger the adhesive force of a magnet, the higher the risk for injury. Always wear safety gloves when magnet fishing. Cut-resistant ones are best.
  • When casting the retrieval magnet, always make sure that it is safe to do so for you and your surroundings. People, animals or boats should not be in close proximity to you and should remain well outside the trajectory route of the magnet.

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