Wide Surface Area, High-Grade N52
We supply large neodymium block magnets for your application.
- Include heavy-duty magnet fishing, salvage operations, industrial retrieval, etc.
Standard round “pot magnets” usually come with a small spot.
A large NdFeB block magnet (e.g., 100mm or 150mm length) can act as a magnetic sweeper.
When dragged behind a boat or from a bridge, its wide profile covers more ground with every pass.
This maximizes the chance of snagging scrap metal, tools, or safes from the bottom of waterways.
Why Use a Block for Fishing?
The block shape offers a distinct advantage for serious salvage operations.
1. The “Wide Path” Advantage:
The Physics:
A round magnet captures debris at a single point.
A long rectangular block creates a “magnetic line.”
The Benefit:
Ideally suited for Trawling.
By orienting the block perpendicular to the drag direction, you increase your sweep width by 300-400% compared to a disc magnet.
2. Multi-Face Attraction:
The Benefit:
Unless encased in a steel cup, a raw block magnet emits force from both large faces.
This means it doesn’t matter if the magnet flips over underwater; it stays active on both sides.
Durability Advisory: Protection is Mandatory
A raw Neodymium block is brittle.
It cannot survive underwater impact alone.
1. The “U-Channel” Solution:
We strongly recommend that these large blocks be mounted inside a Stainless Steel U-Channel or casing.
Why:
If a raw 100mm block hits a rock underwater, it will shatter.
A steel channel protects the brittle corners while focusing the magnetic field downwards (increasing vertical pull force).
Our Service:
We can supply the magnet with Countersunk Holes to bolt securely into your protective housing.
2. Anti-Corrosion Strategy:
The Risk:
River water is corrosive.
Standard Nickel plating may eventually peel if scratched by rocks.
The Solution:
For dedicated fishing blocks, we recommend Epoxy Coating (Black) or Rubberizing (after assembly).
Such coatings provide a waterproof shock-absorbing layer.
Manufacturing Capabilities
Dimensions:
– Length: Custom up to 200mm (for wide drag bars).
– Thickness: Up to 50mm (for deep magnetic reach).
– Mounting: We can machine Countersunk Holes (M8, M10) directly into the magnet block for attaching eye-bolts.
Material Grade:
N45 – N52:
We recommend the highest grades.
Ensure the magnet is strong enough to pull heavy objects through deep silt or mud.
Ideal Applications
Magnet Fishing: Dragging rivers and canals for scrap metal and relics.
Industrial Tank Cleaning: Dropped tool retrieval in large dip tanks.
Conveyor Sweepers: Hanging above conveyor belts to catch tramp iron.
Marina Cleanup: Recovering keys and tools dropped from docks.
Ordering Guide: Build Your Rig
To supply the right block, we need to know your mounting plan:
1). Dimensions: Length x Width x Thickness.
2). Mounting Style:
– Solid Block: (You will build a cage for it).
– Countersunk: (You need holes to bolt an eyelet directly through it).
3). Hole Count: “One central hole, or two holes (one at each end) for stability?”
4). Coating: Ni-Cu-Ni (Standard) or Epoxy (Black/Salt Resistant).
Packing Method
It is important to guarantee safe transit for big NdFeB magnets.
And comply with international IATA and IMDG regulations.
We follow a 3-stage shielding method for all large neodymium shipments.
1). First, we put the magnets in dense foam to create a protective air gap.
2). Then, line the shipping cartons with steel plates to securely contain the intense magnetic flux.
- When shipping multiple pieces, we will alternate pole alignments.
- Neutralize stray magnetic fields.
- Insert sturdy spacers between the magnets.
This way, we can ensure safe, pinch-free separation upon unpacking.
3). Finally, every package will undergo stringent field-strength testing before sending to shippers.
Follow these 3 essential steps, we can guarantee such big strong magnets pass airline safety standards.
And assure a secure and hassle-free delivery to you.
