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UMP 65x45 [M8]x2 GW / N38 - search holder

Name: Dhit sp. z o.o.
Address: Kościuszki 6A, Ożarów Mazowiecki, Poland, 05-850, PL
Telephone: +48 22 499 98 98
Price range: PLN 1-6500
Rating: 5

search holder

Catalog no 210348

GTIN/EAN: 5906301813996

5.00

Diameter Ø

65 mm [±1 mm]

Height

45 mm [±1 mm]

Weight

1170 g

Load capacity

230.00 kg / 2255.53 N

Coating

[NiCuNi] Nickel

see properties »

150.00 ZŁ with VAT / pcs + price for transport

121.95 ZŁ net + 23% VAT / pcs

bulk discounts:

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Want to talk magnets?

Call us now +48 888 99 98 98 or send us a note by means of inquiry form our website.
Lifting power as well as form of a magnet can be reviewed with our online calculation tool.

Orders submitted before 14:00 will be dispatched today!

💡 Guide: How to choose a decent magnet and not get ripped off?

Don't be fooled by amateur online tests – go for certified quality and specific parameters that guarantee success:

📏 Magnet thickness in the casing (min. 10mm) – This is what matters most! Thin magnets are weak. Thanks to the 1cm thickness of N52 neodymium, your magnet "sees" metal even through thick rust and mud.
🛡️ Armored protection (Black Epoxy) – Forget about rust. This coating doesn't chip when hitting rocks and protects the magnet in water much better than regular nickel, which fails quickly.
🧲 Eyelets that don't steal power – Made of special non-magnetic steel, so they don't stick to the magnet and don't block the force. Important: mount only one eyelet at a time! Using 3 at once is a mistake that weakens the magnet.
🧶 Certified rope (min. 8mm) – You gain the certainty that your gear won't stay at the bottom. It's thick and comfortable, so it doesn't cut your fingers when pulling out heavy scrap metal.
🚀 Our advantage: We are the only ones combining the strongest N52 neodymium (10mm thick) with non-magnetic eyelets. This is real power and durability you won't find anywhere else.

Invest in solid equipment and enjoy the results!

Technical specification of the product - UMP 65x45 [M8]x2 GW / N38 - search holder

Specification / characteristics - UMP 65x45 [M8]x2 GW / N38 - search holder

properties

properties	values
Cat. no.	210348
GTIN/EAN	5906301813996
Production/Distribution	Dhit sp. z o.o. ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin	Poland / China / Germany
Customs code	85059029
Diameter Ø	65 mm [±1 mm]
Height	45 mm [±1 mm]
Weight	1170 g
Load capacity ~ ?	230.00 kg / 2255.53 N
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMP 65x45 [M8]x2 GW / N38 - search holder

properties	values	units
remenance Br [min. - max.] ?	12.2-12.6	kGs
remenance Br [min. - max.] ?	1220-1260	mT
coercivity bHc ?	10.8-11.5	kOe
coercivity bHc ?	860-915	kA/m
actual internal force iHc	≥ 12	kOe
actual internal force iHc	≥ 955	kA/m
energy density [min. - max.] ?	36-38	BH max MGOe
energy density [min. - max.] ?	287-303	BH max KJ/m
max. temperature ?	≤ 80	°C

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 10^-6	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10^-6	°C^-1
Young's modulus	1.7 x 10⁴	kg/mm²

Technical and environmental data

Material specification

iron (Fe)	64% – 68%
neodymium (Nd)	29% – 32%
boron (B)	1.1% – 1.2%
dysprosium (Dy)	0.5% – 2.0%
coating (Ni-Cu-Ni)	< 0.05%

Sustainability

recyclability (EoL)	100%
recycled raw materials	~10% (pre-cons)
carbon footprint	low / zredukowany
waste code (EWC)	16 02 16

Safety card (GPSR)

responsible entity

Dhit sp. z o.o.

ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki

tel: +48 22 499 98 98 | e-mail: bok@dhit.pl

batch number/type

id: 210348-2026

Measurement Calculator

Pulling force

Force in kg

Force in lbs

Magnetic Induction

Gauss (Gs)

Input a figure in just one field to generate results for all other fields immediately.

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For underwater searches, we recommend specialized holders from the GOLD series, designed for working in difficult conditions. This specific magnet ensures a laboratory lifting capacity of up to 230.00 kg, which translates into high effectiveness in water. The choice depends on whether you plan to throw from the shore (double-sided) or from a bridge (single-sided).

The double-sided model attracts from above and below, increasing the chance of hooking a find. The side eyelet ensures the magnet doesn't stand sideways or "on edge" during pulling. 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.

Most of our starter kits are complete and ready to use. In the package, you will find everything needed: strong rope (e.g., 20m), gloves, and hardware. Using thread glue is crucial to not lose the magnet in silt.

The capacity given in the name (e.g., 230.00 kg) is the maximum value measured in laboratory conditions. In a river, objects are often rusty, silted, or irregular in shape (e.g., pipes), which drastically reduces grip strength. Therefore, to pull objects weighing 10kg from the water, a magnet with a capacity of 200-300kg is often needed.

Searches are allowed as long as you do not interfere with archaeological sites or search for weapons. It is worth acting responsibly, cleaning up after yourself, and caring for the environment by removing fished-out scrap.

It is the smartest investment because for the identical price, you buy a premium mount that will serve you for many seasons than generic imports.

Most magnets on the market have weak shells that deform during the any strong impact against concrete or rocks.

Many distributors use a trick by promoting the power measured exclusively on the top hook. Crucially, in the web, there are virtually no recordings testing the real side-pull force of competitor products on the side hook.

{By choosing GOLD mounts, you bet on Polish engineering that knows the conditions of local rivers and lakes. Instead of risking with random brands, it is better to choose proven gear that ensures the satisfaction of searcher.

Pros and cons of Nd₂Fe₁₄B magnets.

Strengths

In addition to their pulling strength, neodymium magnets provide the following advantages:

They virtually do not lose strength, because even after ten years the performance loss is only ~1% (according to literature),
They are extremely resistant to demagnetization induced by presence of other magnetic fields,
By applying a smooth coating of gold, the element has an aesthetic look,
Magnetic induction on the working layer of the magnet remains extremely intense,
Thanks to resistance to high temperature, they are capable of working (depending on the shape) even at temperatures up to 230°C and higher...
In view of the ability of free molding and customization to custom needs, magnetic components can be manufactured in a variety of geometric configurations, which increases their versatility,
Huge importance in modern industrial fields – they are commonly used in hard drives, electromotive mechanisms, medical devices, and other advanced devices.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

What to avoid - cons of neodymium magnets: weaknesses and usage proposals

Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a special holder, which not only protects them against impacts but also raises their durability
NdFeB magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture, in case of application outdoors
We suggest a housing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complex forms.
Possible danger resulting from small fragments of magnets are risky, in case of ingestion, which is particularly important in the context of child safety. Additionally, small components of these products are able to complicate diagnosis medical when they are in the body.
High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Holding force characteristics

Maximum holding power of the magnet – what it depends on?

The declared magnet strength represents the peak performance, obtained under laboratory conditions, namely:

on a plate made of structural steel, optimally conducting the magnetic field
with a thickness minimum 10 mm
characterized by even structure
under conditions of no distance (metal-to-metal)
for force acting at a right angle (pull-off, not shear)
at conditions approx. 20°C

What influences lifting capacity in practice

Bear in mind that the application force will differ subject to the following factors, starting with the most relevant:

Gap (betwixt the magnet and the plate), since even a microscopic distance (e.g. 0.5 mm) results in a reduction in force by up to 50% (this also applies to varnish, rust or debris).
Pull-off angle – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the maximum value.
Steel thickness – insufficiently thick steel does not close the flux, causing part of the flux to be escaped to the other side.
Metal type – not every steel reacts the same. Alloy additives worsen the interaction with the magnet.
Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Uneven metal weaken the grip.
Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was conducted on a smooth plate of suitable thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a minimal clearance between the magnet and the plate reduces the holding force.

Warnings

Implant safety

People with a heart stimulator should keep an large gap from magnets. The magnetic field can stop the operation of the life-saving device.

Do not underestimate power

Before use, read the rules. Sudden snapping can break the magnet or hurt your hand. Be predictive.

Cards and drives

Avoid bringing magnets near a purse, laptop, or screen. The magnetism can destroy these devices and wipe information from cards.

Skin irritation risks

Studies show that the nickel plating (the usual finish) is a common allergen. If you have an allergy, refrain from touching magnets with bare hands and opt for encased magnets.

Physical harm

Large magnets can smash fingers in a fraction of a second. Never place your hand betwixt two strong magnets.

Fire warning

Combustion risk: Neodymium dust is highly flammable. Avoid machining magnets without safety gear as this may cause fire.

Demagnetization risk

Standard neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. Damage is permanent.

Fragile material

Despite metallic appearance, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may shatter into hazardous fragments.

Do not give to children

Product intended for adults. Tiny parts can be swallowed, causing intestinal necrosis. Keep away from children and animals.

GPS and phone interference

GPS units and smartphones are highly sensitive to magnetic fields. Direct contact with a strong magnet can permanently damage the sensors in your phone.

Warning! Learn more about risks in the article: Safety of working with magnets.

UMP 65x45 [M8]x2 GW / N38 - search holder

Technical specification of the product - UMP 65x45 [M8]x2 GW / N38 - search holder

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Material specification

Sustainability

Pulling force

Magnetic Induction

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Pros and cons of Nd2Fe14B magnets.

Strengths

Disadvantages

Holding force characteristics

Maximum holding power of the magnet – what it depends on?

What influences lifting capacity in practice

Warnings

Implant safety

Do not underestimate power

Cards and drives

Skin irritation risks

Physical harm

Fire warning

Demagnetization risk

Fragile material

Do not give to children

GPS and phone interference

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Pros and cons of Nd₂Fe₁₄B magnets.