UMH 75x18x68 [M8] / N38 - magnetic holder with hook

Product available Ships in 3 days

UMH 75x18x68 [M8] / N38 - magnetic holder with hook

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

magnetic holder with hook

Catalog no 310432

GTIN/EAN: 5906301814610

5.00

Diameter Ø

75 mm [±1 mm]

Height

68 mm [±1 mm]

Height

18 mm [±1 mm]

Weight

625 g

Magnetization Direction

↑ axial

Load capacity

162.00 kg / 1588.68 N

Coating

[NiCuNi] Nickel

product details »

202.95 ZŁ with VAT / pcs + price for transport

165.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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price from 1 pcs

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145.20 ZŁ

178.60 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Need help making a decision?

Contact us by phone +48 888 99 98 98 alternatively contact us through inquiry form through our site.
Lifting power as well as structure of a magnet can be checked on our magnetic calculator.

Orders submitted before 14:00 will be dispatched today!

Product card - UMH 75x18x68 [M8] / N38 - magnetic holder with hook

Specification / characteristics - UMH 75x18x68 [M8] / N38 - magnetic holder with hook

properties

properties	values
Cat. no.	310432
GTIN/EAN	5906301814610
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	75 mm [±1 mm]
Height	68 mm [±1 mm]
Height	18 mm [±1 mm]
Weight	625 g
Magnetization Direction	↑ axial
Load capacity ~ ?	162.00 kg / 1588.68 N
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMH 75x18x68 [M8] / N38 - magnetic holder with hook

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 specification and ecology

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%

Ecology and recycling (GPSR)

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: 310432-2025

Magnet Unit Converter

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Kilograms (kg)

Force (N)

Force in lbs

Field Strength

Induction (T)

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Holders with a hook are indispensable in large-format stores and warehouses for suspending advertisements (POS systems). In workshops and garages, they work perfectly for guiding cables or hanging work lighting.

The magnet has a standard threaded socket, which allows replacing the hook with any other accessory with a thread. This gives huge application flexibility and allows adapting the holder to current needs.

You will get the greatest force by mounting the magnet on a thick, smooth steel surface vertically. For heavy ceiling ads or tools, we recommend choosing a magnet with a considerable power reserve.

The cup acts as a magnetic armature, intensifying the neodymium action and increasing efficiency. A bare magnet could crack upon sudden application to metal, and the holder is resistant to this.

For outdoor use (in rain), metal hangers may eventually develop a rusty coating over time. In home and office conditions, they will serve for many years without signs of wear.

Strengths and weaknesses of neodymium magnets.

Advantages

In addition to their magnetic capacity, neodymium magnets provide the following advantages:

They retain attractive force for almost 10 years – the drop is just ~1% (based on simulations),
They are extremely resistant to demagnetization induced by external disturbances,
By applying a smooth coating of nickel, the element acquires an nice look,
Magnetic induction on the working part of the magnet remains strong,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
Possibility of exact forming as well as optimizing to individual conditions,
Universal use in innovative solutions – they serve a role in computer drives, drive modules, medical devices, and complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in compact constructions

Disadvantages

Problematic aspects of neodymium magnets: tips and applications.

To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
Neodymium magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (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 very resistant to heat
When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation as well as corrosion.
Limited ability of producing nuts in the magnet and complex shapes - recommended is a housing - magnetic holder.
Possible danger to health – tiny shards of magnets can be dangerous, if swallowed, which becomes key in the context of child safety. Additionally, tiny parts of these products are able to complicate diagnosis medical after entering the body.
With mass production the cost of neodymium magnets can be a barrier,

Pull force analysis

Best holding force of the magnet in ideal parameters – what affects it?

Holding force of 162.00 kg is a measurement result conducted under the following configuration:

using a base made of low-carbon steel, serving as a circuit closing element
possessing a massiveness of minimum 10 mm to avoid saturation
with an ideally smooth touching surface
without any clearance between the magnet and steel
for force acting at a right angle (pull-off, not shear)
in stable room temperature

What influences lifting capacity in practice

It is worth knowing that the magnet holding will differ subject to elements below, starting with the most relevant:

Air gap (betwixt the magnet and the plate), since even a tiny clearance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to paint, rust or debris).
Direction of force – maximum parameter is obtained only during perpendicular pulling. The shear force of the magnet along the plate is usually many times lower (approx. 1/5 of the lifting capacity).
Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux penetrates through instead of converting into lifting capacity.
Steel type – mild steel gives the best results. Alloy admixtures decrease magnetic properties and holding force.
Plate texture – ground elements ensure maximum contact, which improves force. Uneven metal reduce efficiency.
Temperature influence – hot environment reduces pulling force. Too high temperature can permanently demagnetize the magnet.

Lifting capacity was measured by applying a steel plate with a smooth surface of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under attempts to slide the magnet the holding force is lower. Moreover, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

Precautions when working with neodymium magnets

Bodily injuries

Mind your fingers. Two large magnets will join instantly with a force of several hundred kilograms, crushing everything in their path. Be careful!

Safe operation

Be careful. Neodymium magnets attract from a distance and snap with massive power, often faster than you can move away.

Impact on smartphones

A powerful magnetic field negatively affects the operation of magnetometers in phones and GPS navigation. Maintain magnets near a smartphone to avoid breaking the sensors.

Keep away from computers

Data protection: Strong magnets can ruin data carriers and sensitive devices (pacemakers, medical aids, mechanical watches).

Danger to pacemakers

Health Alert: Neodymium magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.

Magnets are brittle

NdFeB magnets are sintered ceramics, which means they are fragile like glass. Clashing of two magnets leads to them breaking into small pieces.

Maximum temperature

Watch the temperature. Exposing the magnet above 80 degrees Celsius will ruin its magnetic structure and strength.

Swallowing risk

Adult use only. Small elements pose a choking risk, causing serious injuries. Keep away from kids and pets.

Fire warning

Powder created during cutting of magnets is flammable. Do not drill into magnets unless you are an expert.

Nickel coating and allergies

Studies show that the nickel plating (standard magnet coating) is a strong allergen. For allergy sufferers, avoid direct skin contact or select versions in plastic housing.

Important! Looking for details? Check our post: Why are neodymium magnets dangerous?

UMH 75x18x68 [M8] / N38 - magnetic holder with hook

Product card - UMH 75x18x68 [M8] / N38 - magnetic holder with hook

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Material specification

Ecology and recycling (GPSR)

Force (pull)

Field Strength

Other deals

SM 32x100 [2xM8] / N42 - magnetic separator

MW 25x6 / N38 - cylindrical magnet

SM 25x200 [2xM8] / N52 - magnetic separator

MP 10x7/3.5x3 / N38 - ring magnet

Strengths and weaknesses of neodymium magnets.

Advantages

Disadvantages

Pull force analysis

Best holding force of the magnet in ideal parameters – what affects it?

What influences lifting capacity in practice

Precautions when working with neodymium magnets

Bodily injuries

Safe operation

Impact on smartphones

Keep away from computers

Danger to pacemakers

Magnets are brittle

Maximum temperature

Swallowing risk

Fire warning

Nickel coating and allergies

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C