UMH 42x9x46 [M6] / N38 - magnetic holder with hook

UMH 42x9x46 [M6] / N38 - magnetic holder with hook - ujęcie 2

Product available Ships in 2 days

UMH 42x9x46 [M6] / 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 310429

GTIN/EAN: 5906301814580

5.00

Diameter Ø

42 mm [±1 mm]

Height

46 mm [±1 mm]

Height

9 mm [±1 mm]

Weight

90 g

Magnetization Direction

↑ axial

Load capacity

66.00 kg / 647.24 N

Coating

[NiCuNi] Nickel

view technical data »

35.99 ZŁ with VAT / pcs + price for transport

29.26 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

Need advice?

Pick up the phone and ask +48 22 499 98 98 or let us know through request form the contact section.
Weight as well as shape of neodymium magnets can be tested using our modular calculator.

Orders placed before 14:00 will be shipped the same business day.

Technical specification - UMH 42x9x46 [M6] / N38 - magnetic holder with hook

Specification / characteristics - UMH 42x9x46 [M6] / N38 - magnetic holder with hook

properties

properties	values
Cat. no.	310429
GTIN/EAN	5906301814580
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	42 mm [±1 mm]
Height	46 mm [±1 mm]
Height	9 mm [±1 mm]
Weight	90 g
Magnetization Direction	↑ axial
Load capacity ~ ?	66.00 kg / 647.24 N
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMH 42x9x46 [M6] / 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

Engineering data and GPSR

Chemical composition

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%

Environmental data

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: 310429-2026

Measurement Calculator

Force (pull)

Kilograms (kg)

lbs

Magnetic Induction

Gauss (Gs)

Simply complete one field, to let the tool compute the rest automatically.

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They serve to create mobile suspension points without the need to drill holes in beams. In workshops and garages, they work perfectly for guiding cables or hanging work lighting.

Yes, the hook is an element screwed into a bushing with a metric thread (e.g., M4, M5, M6 - check description). 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. When mounting on a wall (vertically), the holding force is much lower due to shear force (the magnet may slide).

Thanks to the metal cover, attraction force is concentrated, which significantly increases capacity compared to a bare magnet. Additionally, steel protects the brittle magnet from cracking upon hitting the ceiling or beam.

Standard holders are coated with a layer of nickel or zinc, which protects them from corrosion indoors. Metal elements can rust with constant contact with atmospheric moisture.

Advantages and disadvantages of neodymium magnets.

Strengths

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

They have unchanged lifting capacity, and over nearly ten years their attraction force decreases symbolically – ~1% (in testing),
Magnets very well protect themselves against loss of magnetization caused by external fields,
A magnet with a shiny gold surface has an effective appearance,
Magnetic induction on the working layer of the magnet is very high,
Through (adequate) combination of ingredients, they can achieve high thermal strength, enabling operation at temperatures approaching 230°C and above...
Due to the ability of free shaping and customization to specialized projects, neodymium magnets can be modeled in a wide range of geometric configurations, which expands the range of possible applications,
Universal use in electronics industry – they are commonly used in hard drives, electromotive mechanisms, precision medical tools, as well as technologically advanced constructions.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Cons

Disadvantages of NdFeB magnets:

To avoid cracks under impact, we suggest using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
Neodymium magnets lose their force under the influence of heating. As soon as 80°C is exceeded, many of them start losing their force. Therefore, we recommend our special magnets marked [AH], which maintain stability 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.
Due to limitations in creating threads and complex shapes in magnets, we recommend using casing - magnetic mount.
Potential hazard related to microscopic parts of magnets are risky, if swallowed, which gains importance in the context of child health protection. Furthermore, small elements of these devices are able to complicate diagnosis medical when they are in the body.
Due to neodymium price, their price is relatively high,

Lifting parameters

Magnetic strength at its maximum – what affects it?

The declared magnet strength concerns the maximum value, recorded under laboratory conditions, meaning:

using a sheet made of high-permeability steel, functioning as a ideal flux conductor
possessing a massiveness of minimum 10 mm to avoid saturation
with an ideally smooth touching surface
with zero gap (no paint)
under axial application of breakaway force (90-degree angle)
at temperature room level

Magnet lifting force in use – key factors

In practice, the real power is determined by several key aspects, listed from crucial:

Clearance – the presence of foreign body (paint, dirt, air) interrupts the magnetic circuit, which lowers power rapidly (even by 50% at 0.5 mm).
Force direction – declared lifting capacity refers to pulling vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of nominal force).
Element thickness – to utilize 100% power, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
Chemical composition of the base – low-carbon steel gives the best results. Alloy admixtures lower magnetic permeability and lifting capacity.
Base smoothness – the more even the surface, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
Thermal conditions – neodymium magnets have a sensitivity to temperature. At higher temperatures they are weaker, and at low temperatures gain strength (up to a certain limit).

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, in contrast under shearing force the holding force is lower. Additionally, even a slight gap between the magnet and the plate reduces the lifting capacity.

Warnings

Do not overheat magnets

Monitor thermal conditions. Heating the magnet to high heat will destroy its magnetic structure and pulling force.

Caution required

Handle magnets consciously. Their powerful strength can shock even experienced users. Be vigilant and do not underestimate their power.

Fire risk

Fire warning: Rare earth powder is highly flammable. Avoid machining magnets without safety gear as this risks ignition.

Protective goggles

NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Impact of two magnets will cause them breaking into small pieces.

Skin irritation risks

Some people experience a sensitization to Ni, which is the standard coating for neodymium magnets. Frequent touching might lead to skin redness. It is best to use protective gloves.

Choking Hazard

Strictly store magnets out of reach of children. Risk of swallowing is high, and the consequences of magnets clamping inside the body are tragic.

Keep away from electronics

Remember: rare earth magnets generate a field that confuses sensitive sensors. Keep a separation from your phone, device, and navigation systems.

Magnetic media

Powerful magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Keep a distance of at least 10 cm.

Danger to pacemakers

For implant holders: Strong magnetic fields affect medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.

Bodily injuries

Mind your fingers. Two large magnets will join instantly with a force of massive weight, destroying everything in their path. Exercise extreme caution!

Important! Learn more about risks in the article: Magnet Safety Guide.

UMH 42x9x46 [M6] / N38 - magnetic holder with hook

Technical specification - UMH 42x9x46 [M6] / N38 - magnetic holder with hook

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Chemical composition

Environmental data

Force (pull)

Magnetic Induction

Other products

UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread

SMZR 32x250 / N52 - magnetic separator with handle

UMN 410x44x15 / N52 - knife holder

UMGW 32x18x8 [M6] GW / N38 - magnetic holder internal thread

Advantages and disadvantages of neodymium magnets.

Strengths

Cons

Lifting parameters

Magnetic strength at its maximum – what affects it?

Magnet lifting force in use – key factors

Warnings

Do not overheat magnets

Caution required

Fire risk

Protective goggles

Skin irritation risks

Choking Hazard

Keep away from electronics

Magnetic media

Danger to pacemakers

Bodily injuries

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C