UMH 20x7x35 [M4] / N38 - magnetic holder with hook

Product available Ships today (order by 14:00)

UMH 20x7x35 [M4] / 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: PLN 1-6500
Rating: 5

magnetic holder with hook

Catalog no 310425

GTIN/EAN: 5906301814542

5.00

Diameter Ø

20 mm [±1 mm]

Height

35 mm [±1 mm]

Height

7 mm [±1 mm]

Weight

21 g

Magnetization Direction

↑ axial

Load capacity

14.50 kg / 142.20 N

Coating

[NiCuNi] Nickel

technical parameters »

8.59 ZŁ with VAT / pcs + price for transport

6.98 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Contact us by phone +48 888 99 98 98 if you prefer contact us by means of form through our site.
Parameters and shape of neodymium magnets can be tested using our magnetic calculator.

Same-day shipping for orders placed before 14:00.

Technical parameters - UMH 20x7x35 [M4] / N38 - magnetic holder with hook

Specification / characteristics - UMH 20x7x35 [M4] / N38 - magnetic holder with hook

properties

properties	values
Cat. no.	310425
GTIN/EAN	5906301814542
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	20 mm [±1 mm]
Height	35 mm [±1 mm]
Height	7 mm [±1 mm]
Weight	21 g
Magnetization Direction	↑ axial
Load capacity ~ ?	14.50 kg / 142.20 N
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMH 20x7x35 [M4] / 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 and environmental data

Elemental analysis

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: 310425-2026

Measurement Calculator

Magnet pull force

Kilograms (kg)

Force (N)

Force in lbs

Magnetic Induction

Induction (T)

Just complete a single box, to let the calculator compute the rest instantly.

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They serve to create mobile suspension points without the need to drill holes in beams. It is a universal hanger that you can move to another place at any time without a trace.

The tip is fully demountable - you can unscrew the hook and screw in a bolt, eyelet, or other element in its place. Thanks to this, one magnet can perform many functions - sometimes be a hook, and sometimes a holder for a bolt.

The given value defines the maximum load when suspended under a thick, horizontal ceiling beam. If you hang the magnet on a wall, the real capacity is approx. 20-30% of the nominal value.

Thanks to the metal cover, attraction force is concentrated, which significantly increases capacity compared to a bare magnet. 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 Nd₂Fe₁₄B magnets.

Pros

Besides their high retention, neodymium magnets are valued for these benefits:

They retain attractive force for almost ten years – the loss is just ~1% (according to analyses),
Neodymium magnets are highly resistant to magnetic field loss caused by external interference,
In other words, due to the shiny surface of nickel, the element looks attractive,
Magnetic induction on the working part of the magnet remains strong,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
In view of the potential of flexible forming and customization to specialized projects, neodymium magnets can be produced in a broad palette of forms and dimensions, which amplifies use scope,
Wide application in modern technologies – they are commonly used in data components, drive modules, medical devices, and technologically advanced constructions.
Thanks to efficiency per cm³, small magnets offer high operating force, occupying minimum space,

Cons

Disadvantages of neodymium magnets:

At strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage and increases the magnet's durability.
When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material resistant to moisture, when using outdoors
We recommend cover - magnetic mount, due to difficulties in realizing nuts inside the magnet and complex forms.
Possible danger related to microscopic parts of magnets can be dangerous, in case of ingestion, which becomes key in the context of child safety. Furthermore, tiny parts of these magnets are able to complicate diagnosis medical after entering the body.
Due to complex production process, their price exceeds standard values,

Holding force characteristics

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

Information about lifting capacity is the result of a measurement for optimal configuration, assuming:

using a base made of mild steel, serving as a ideal flux conductor
possessing a massiveness of min. 10 mm to ensure full flux closure
with an ground contact surface
under conditions of no distance (metal-to-metal)
during detachment in a direction vertical to the plane
in neutral thermal conditions

Magnet lifting force in use – key factors

Please note that the working load may be lower depending on the following factors, in order of importance:

Space between surfaces – every millimeter of separation (caused e.g. by veneer or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
Force direction – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet holds much less (typically approx. 20-30% of maximum force).
Plate thickness – too thin steel does not accept the full field, causing part of the power to be wasted into the air.
Steel grade – ideal substrate is pure iron steel. Stainless steels may have worse magnetic properties.
Surface quality – the more even the plate, the better the adhesion and stronger the hold. Roughness creates an air distance.
Temperature influence – hot environment weakens magnetic field. Too high temperature can permanently demagnetize the magnet.

Lifting capacity testing was performed on a smooth plate of suitable thickness, under a perpendicular pulling force, however under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a small distance between the magnet and the plate reduces the load capacity.

Safe handling of neodymium magnets

Protect data

Do not bring magnets close to a purse, computer, or TV. The magnetic field can permanently damage these devices and wipe information from cards.

Avoid contact if allergic

Allergy Notice: The nickel-copper-nickel coating contains nickel. If redness occurs, immediately stop working with magnets and wear gloves.

Adults only

NdFeB magnets are not toys. Accidental ingestion of a few magnets can lead to them connecting inside the digestive tract, which poses a direct threat to life and requires immediate surgery.

Physical harm

Big blocks can smash fingers instantly. Do not place your hand betwixt two attracting surfaces.

Thermal limits

Do not overheat. NdFeB magnets are susceptible to heat. If you require operation above 80°C, ask us about special high-temperature series (H, SH, UH).

Protective goggles

Despite metallic appearance, neodymium is brittle and cannot withstand shocks. Do not hit, as the magnet may crumble into hazardous fragments.

Impact on smartphones

Navigation devices and mobile phones are extremely sensitive to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Respect the power

Handle with care. Rare earth magnets act from a long distance and connect with huge force, often faster than you can move away.

Fire warning

Powder created during machining of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Health Danger

Medical warning: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.

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

UMH 20x7x35 [M4] / N38 - magnetic holder with hook

Technical parameters - UMH 20x7x35 [M4] / N38 - magnetic holder with hook

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Elemental analysis

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Induction

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MW 20x2 / N38 - cylindrical magnet

Strengths and weaknesses of Nd2Fe14B magnets.

Pros

Cons

Holding force characteristics

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

Magnet lifting force in use – key factors

Safe handling of neodymium magnets

Protect data

Avoid contact if allergic

Adults only

Physical harm

Thermal limits

Protective goggles

Impact on smartphones

Respect the power

Fire warning

Health Danger

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Strengths and weaknesses of Nd₂Fe₁₄B magnets.