tel: +48 888 99 98 98

neodymium magnets

We offer blue color magnetic Nd2Fe14B - our store's offer. All "magnets" in our store are available for immediate purchase (check the list). See the magnet pricing for more details see the magnet price list

Magnets for fishing F200 GOLD

Where to purchase strong magnet? Magnetic holders in solid and airtight enclosure are perfect for use in variable and difficult weather, including during snow and rain see

magnets with holders

Magnetic holders can be applied to enhance production processes, exploring underwater areas, or finding meteorites from gold more information...

We promise to ship your order on the day of purchase before 2:00 PM on business days.

Dhit sp. z o.o.
Product on order Ships in 3-5 days

UMP 75x24 [M8+M10] GW F 200 kg - search holder

search holder

Catalog no 210336

GTIN: 5906301813958

0

Diameter Ø

75 mm [±1 mm]

Height

24 mm [±1 mm]

Weight

900 g

Load capacity

280 kg / 2745.86 N

Coating

[NiCuNi] nickel

200.00 with VAT / pcs + price for transport

162.60 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
162.60 ZŁ
200.00 ZŁ
price from 10 pcs
152.84 ZŁ
188.00 ZŁ
price from 20 pcs
143.09 ZŁ
176.00 ZŁ

Not sure where to buy?

Contact us by phone +48 888 99 98 98 if you prefer drop us a message through form through our site.
Parameters as well as structure of neodymium magnets can be checked on our magnetic mass calculator.

Order by 14:00 and we’ll ship today!

UMP 75x24 [M8+M10] GW F 200 kg - search holder
Specification/characteristics UMP 75x24 [M8+M10] GW F 200 kg - search holder
properties
values
Cat. no.
210336
GTIN
5906301813958
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
75 mm [±1 mm]
Height
24 mm [±1 mm]
Weight
900 g
Load capacity ~ ?
280 kg / 2745.86 N
Coating
[NiCuNi] nickel
Manufacturing Tolerance
±1 mm

Magnetic properties of material

properties
values
units

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

properties
values
units
Vickers hardness
≥550
Hv
Density
≥7.4
g/cm3
Curie Temperature TC
312 - 380
°C
Curie Temperature TF
593 - 716
°F
Specific resistance
150
μΩ⋅Cm
Bending strength
250
Mpa
Compressive strength
1000~1100
Mpa
Thermal expansion parallel (∥) to orientation (M)
(3-4) x 106
°C-1
Thermal expansion perpendicular (⊥) to orientation (M)
-(1-3) x 10-6
°C-1
Young's modulus
1.7 x 104
kg/mm²

Shopping tips

For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. It is equipment that can handle pulling heavy and silted objects from the river bottom. For beginners, we recommend lighter single-sided models (F80-F200), for advanced users - heavier double-sided (Two-Side) ones.
The 2xTwo-Side version is more versatile, allowing the eyelet to be mounted in two positions. Top mounting works well when fishing from a bridge, pier, or well (vertical technique). Single-sided magnets are usually lighter and cheaper but less effective for long throws.
Our holders have a thick steel housing covered with an anti-corrosion layer (chrome, nickel, zinc). Despite solid construction, neodymium is a brittle material and can chip upon very strong impact (e.g., against concrete). After each fishing trip, we recommend rinsing the magnet with fresh water and drying it.
We offer both standalone holders and ready-made gift sets (depending on the selected option in the store). A full set usually contains: magnet, polypropylene rope with appropriate strength, protective gloves, hook, and carabiner. We recommend always securing the thread with glue or tightening the eyelet firmly before first use.
It is a technical parameter defining perpendicular break force, not the weight of an object in water. The magnet may slide on round elements (bicycle frame) due to the small contact area. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.
If you find a dangerous object (unexploded ordnance) or an antique, you have a legal obligation to report it to appropriate services (Police, conservator). It is worth acting responsibly, cleaning up after yourself, and caring for the environment by removing fished-out scrap.

Strengths and weaknesses of rare earth magnets.

Besides their tremendous magnetic power, neodymium magnets offer the following advantages:

  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (based on calculations),
  • They feature excellent resistance to magnetic field loss when exposed to opposing magnetic fields,
  • A magnet with a shiny nickel surface has an effective appearance,
  • They show high magnetic induction at the operating surface, making them more effective,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • Possibility of individual forming and optimizing to atypical conditions,
  • Universal use in electronics industry – they are utilized in data components, electromotive mechanisms, precision medical tools, also technologically advanced constructions.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Disadvantages of neodymium magnets:

  • At very strong impacts they can crack, therefore we recommend placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
  • Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • We recommend a housing - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complicated shapes.
  • Possible danger related to microscopic parts of magnets are risky, if swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small components of these devices are able to complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Maximum lifting capacity of the magnetwhat affects it?

Holding force of 280 kg is a measurement result executed under the following configuration:

  • using a sheet made of low-carbon steel, functioning as a ideal flux conductor
  • whose thickness is min. 10 mm
  • with an ground contact surface
  • with zero gap (without paint)
  • for force applied at a right angle (pull-off, not shear)
  • in stable room temperature

Determinants of practical lifting force of a magnet

Bear in mind that the working load may be lower influenced by the following factors, in order of importance:

  • Distance – the presence of foreign body (rust, dirt, air) interrupts the magnetic circuit, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Load vector – highest force is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of generating force.
  • Chemical composition of the base – low-carbon steel gives the best results. Alloy admixtures lower magnetic properties and holding force.
  • Smoothness – ideal contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
  • Temperature influence – high temperature weakens magnetic field. Exceeding the limit temperature can permanently damage the magnet.

* Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under shearing force the lifting capacity is smaller. Moreover, even a slight gap {between} the magnet and the plate lowers the lifting capacity.

Precautions when working with neodymium magnets

Flammability

Fire hazard: Rare earth powder is highly flammable. Avoid machining magnets in home conditions as this may cause fire.

Adults only

Always keep magnets away from children. Risk of swallowing is significant, and the consequences of magnets clamping inside the body are tragic.

Material brittleness

Despite the nickel coating, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Handling guide

Be careful. Neodymium magnets attract from a distance and snap with huge force, often faster than you can react.

Operating temperature

Monitor thermal conditions. Exposing the magnet to high heat will permanently weaken its magnetic structure and pulling force.

Allergic reactions

Certain individuals have a sensitization to Ni, which is the typical protective layer for NdFeB magnets. Frequent touching might lead to a rash. We strongly advise wear protective gloves.

Life threat

Patients with a heart stimulator must maintain an large gap from magnets. The magnetic field can interfere with the functioning of the implant.

Electronic hazard

Very strong magnetic fields can erase data on credit cards, hard drives, and storage devices. Keep a distance of min. 10 cm.

Bone fractures

Danger of trauma: The pulling power is so great that it can result in blood blisters, pinching, and broken bones. Protective gloves are recommended.

Threat to navigation

GPS units and mobile phones are extremely sensitive to magnetic fields. Close proximity with a strong magnet can permanently damage the sensors in your phone.

Security!

More info about hazards in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98