Magnet fishing in XL
Two instructions for making your own magnetic fishing rod
Online since: 27/08/2009, Number of visits: 301081
Table of Contents
Ring magnet as fishing hook
For many years I have been looking for old metal objects with a metal detector. The dream of every collector is finding an old cannonball, which is not easy to do. I knew: There are probably countless of those treasures still in the water. But how could I find them? I almost gave up hope - until I ordered a huge ring magnet with an adhesive force of 120 kg.
- Ring magnet R-60-06-30-N
- Countersunk screw M6 made of chrome steel
- Washer M8 (to increase the bearing surface of the screw head)
- Hollow screw M16
- Stop nut M8
- Ring bolt M8
- Shrinking hose (for fastening the nylon rope)
- Nylon rope 20-25m
The composition of these parts can be seen on the pictures.
Unbelievable how strong this magnet is! The largest cannonball that I dragged out of the water one night had a diameter of almost 11 cm and was pretty heavy. Meanwhile, I fished some smaller ones out of the water.
I always have various spectators when I do my "fishing". They are amazed by the huge things I can fish out of the water with this magnet!
Extreme collection magnet with pot magnets
Addition from Thomas Hirsch, Berlin (Germany):
I used the following components to assemble my retrieval magnet:
- 7 CSN-60
- 1 aluminium bus 100 cm x 3cm x 2 mm
- 7 rust-proof screws M6
- 7 rust-proof stop nuts M6
- 1 rust-proof ring nut M6
- 1 static rope of your choice
You also need a metal saw and a power drill. Saw the aluminium bus into pieces of 6 x 8 cm and 3 x 14 cm. Drill a hole in each center, 1 cm away from both ends. Put it together as shown in the picture. Now you have a big retrieval magnet with a theoretical holding power of 7 x 110 kg, which you can use to "graze" extensive areas. Due to its large scale, stuff really sticks to it. In reality, underwater rust dust and metal splinters quickly stick to the magnets, which reduces their overall adhesive force.
Unfortunately, I didn't have much time to try it out - but here are a few "finds": Various steel ropes, a ring bolt, a torn bicycle lock (Burg-Wächter F1 - according to the company from 1997) and a can bottom dated "07/31/1996."
Creator of the photos for this application is Thomas Hirsch, who made them available under the licence Creative Commons CC-BY 2.0.
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