e-mail: bok@dhit.pl

neodymium magnets

We provide yellow color magnets Nd2Fe14B - our proposal. Practically all magnesy neodymowe on our website are available for immediate delivery (check the list). See the magnet price list for more details see the magnet price list

Magnet for water searching F300 GOLD

Where to buy very strong magnet? Magnetic holders in airtight, solid enclosure are ideally suited for use in challenging weather, including during snow and rain more...

magnets with holders

Magnetic holders can be used to enhance production, exploring underwater areas, or locating meteors made of ore check...

We promise to ship ordered magnets if the order is placed before 2:00 PM on working 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 [±0,1 mm]

75 mm

Height [±0,1 mm]

24 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

Do you have a dilemma?

Pick up the phone and ask +48 888 99 98 98 otherwise get in touch via form the contact page.
Parameters and structure of a neodymium magnet can be tested on our online calculation tool.

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 [±0,1 mm]
Height
24 mm [±0,1 mm]
Weight
900 g [±0,1 mm]
Load capacity ~ ?
280 kg / 2745.86 N
Coating
[NiCuNi] nickel
Manufacturing Tolerance
± 0.1 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. Model UMP 75x24 [M8+M10] GW F 200 kg offers an optimal weight-to-pull force ratio, which is important for repeated throwing. For beginners, we recommend lighter single-sided models (F80-F200), for advanced users - heavier double-sided (Two-Side) ones.
Double-sided holders (Two-Side) have two active magnetic surfaces and two mounting holes. Side mounting is ideal for throwing from the shore, as the magnet drags flat along the bottom. Single-sided magnets are usually lighter and cheaper but less effective for long throws.
This construction protects the brittle neodymium from direct impact against stones and the bottom. Avoid throwing the magnet against bridge pillars or hard obstacles. After each fishing trip, we recommend rinsing the magnet with fresh water and drying it.
Most of our starter kits are complete and ready to use. 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. Dirt, rust, paint, and algae create a distance that weakens the magnet by even 70-80%. A large power reserve is essential in real search conditions.
Possessing and using a neodymium magnet to clean the bottom is generally legal, provided you are not searching for artifacts protected by law. We recommend familiarizing yourself with current local regulations and heritage protection laws.

Strengths and weaknesses of neodymium magnets.

Besides their stability, neodymium magnets are valued for these benefits:

  • They do not lose power, even over around 10 years – the decrease in lifting capacity is only ~1% (based on measurements),
  • They are resistant to demagnetization induced by external disturbances,
  • In other words, due to the smooth surface of gold, the element gains visual value,
  • Magnets are distinguished by impressive magnetic induction on the active area,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their shape) at temperatures up to 230°C and above...
  • Thanks to versatility in forming and the ability to customize to client solutions,
  • Universal use in innovative solutions – they are utilized in mass storage devices, brushless drives, medical equipment, also complex engineering applications.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

What to avoid - cons of neodymium magnets and proposals for their use:

  • They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also increases its resistance to damage
  • NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
  • We recommend a housing - magnetic holder, due to difficulties in realizing nuts inside the magnet and complex shapes.
  • Health risk resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these products are able to complicate diagnosis medical after entering the body.
  • Due to neodymium price, their price exceeds standard values,

Maximum magnetic pulling forcewhat it depends on?

Breakaway force was determined for the most favorable conditions, assuming:

  • on a plate made of mild steel, effectively closing the magnetic flux
  • possessing a thickness of min. 10 mm to avoid saturation
  • with an ideally smooth touching surface
  • with total lack of distance (no impurities)
  • under vertical force direction (90-degree angle)
  • at conditions approx. 20°C

Determinants of practical lifting force of a magnet

Effective lifting capacity is affected by specific conditions, mainly (from most important):

  • Space between surfaces – every millimeter of distance (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Wall thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
  • Chemical composition of the base – mild steel gives the best results. Higher carbon content decrease magnetic properties and lifting capacity.
  • Surface structure – the smoother and more polished the plate, the better the adhesion and stronger the hold. Unevenness creates an air distance.
  • Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

* Lifting capacity was determined by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, however under shearing force the holding force is lower. Additionally, even a small distance {between} the magnet and the plate reduces the load capacity.

Warnings

Permanent damage

Avoid heat. NdFeB magnets are sensitive to heat. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Allergic reactions

Certain individuals suffer from a sensitization to Ni, which is the standard coating for NdFeB magnets. Frequent touching may cause a rash. We suggest wear protective gloves.

Cards and drives

Do not bring magnets close to a purse, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.

Material brittleness

NdFeB magnets are ceramic materials, meaning they are fragile like glass. Clashing of two magnets leads to them breaking into shards.

Medical implants

Warning for patients: Strong magnetic fields disrupt medical devices. Keep at least 30 cm distance or request help to work with the magnets.

Threat to navigation

Note: rare earth magnets produce a field that confuses precision electronics. Keep a separation from your phone, tablet, and GPS.

Keep away from children

Absolutely keep magnets out of reach of children. Ingestion danger is significant, and the effects of magnets connecting inside the body are fatal.

Hand protection

Pinching hazard: The pulling power is so immense that it can result in hematomas, pinching, and even bone fractures. Use thick gloves.

Flammability

Fire warning: Rare earth powder is explosive. Avoid machining magnets without safety gear as this may cause fire.

Immense force

Before starting, check safety instructions. Sudden snapping can break the magnet or injure your hand. Think ahead.

Danger!

Need more info? Check our post: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98