Product available Ships tomorrow

UMGGZ 22x6 [M4] GZ / N38 - rubber magnetic holder external thread

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

rubber magnetic holder external thread

Catalog no 340310

GTIN/EAN: 5906301814726

5.00

Diameter Ø

22 mm [±1 mm]

Height

6 mm [±1 mm]

Weight

15 g

Load capacity

5.10 kg / 50.01 N

7.38 ZŁ with VAT / pcs + price for transport

6.00 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Call us now +48 22 499 98 98 if you prefer let us know using form through our site.
Lifting power along with form of neodymium magnets can be checked with our power calculator.

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UMGGZ 22x6 [M4] GZ / N38 - rubber magnetic holder external thread

Specification / characteristics UMGGZ 22x6 [M4] GZ / N38 - rubber magnetic holder external thread

properties

properties	values
Cat. no.	340310
GTIN/EAN	5906301814726
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	22 mm [±1 mm]
Height	6 mm [±1 mm]
Weight	15 g
Load capacity ~ ?	5.10 kg / 50.01 N
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMGGZ 22x6 [M4] GZ / N38 - rubber magnetic holder external thread

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%

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: 340310-2025

Quick Unit Converter

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Force (N)

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Gauss (Gs)

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UMGGW 22x6 [M4] GW / N38 - magnetic holder rubber internal thread

7.38 ZŁ brutto / pcs

This type of holder is standard when mounting lighting (beacons), antennas, searchlights, and cameras on a car roof. Thanks to the rubber coating, the magnet is waterproof and does not scratch paint, which is crucial in automotive.

The magnet is tightly sealed with rubber, which protects it from water, road salt, mud, and corrosion. Guarantees no rusty stains on the paint, which happen with regular magnets.

Thanks to the rubber properties, the holder does not slide on the roof, preventing micro-scratches. However, it is worth remembering to wipe the roof of dust and sand before mounting so that it does not get under the magnet.

The magnet has a permanently built-in stud with a metric thread (usually M4, M6, or M8). The stud is an integral part of the steel base and cannot be unscrewed.

Although nominal capacity (e.g., 5.10 kg) is lower than a bare magnet, real adhesion on slippery paint is much better. Holding force depends on the roof sheet thickness.

Strengths and weaknesses of rare earth magnets.

Pros

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

Their power is durable, and after approximately ten years it decreases only by ~1% (theoretically),
They feature excellent resistance to weakening of magnetic properties when exposed to external magnetic sources,
The use of an elegant coating of noble metals (nickel, gold, silver) causes the element to look better,
They are known for high magnetic induction at the operating surface, making them more effective,
Thanks to resistance to high temperature, they can operate (depending on the shape) even at temperatures up to 230°C and higher...
Thanks to flexibility in forming and the ability to customize to complex applications,
Wide application in future technologies – they are used in magnetic memories, electric drive systems, diagnostic systems, as well as industrial machines.
Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Weaknesses

Disadvantages of neodymium magnets:

At very strong impacts they can crack, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
Neodymium magnets decrease 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 magnets in rubber or plastics, which secure oxidation and corrosion.
Limited possibility of producing threads in the magnet and complex shapes - preferred is a housing - mounting mechanism.
Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, tiny parts of these devices can complicate diagnosis medical in case of swallowing.
Higher cost of purchase is one of the disadvantages compared to ceramic magnets, especially in budget applications

Holding force characteristics

Breakaway strength of the magnet in ideal conditions – what it depends on?

Information about lifting capacity is the result of a measurement for the most favorable conditions, assuming:

on a base made of structural steel, perfectly concentrating the magnetic flux
possessing a massiveness of minimum 10 mm to avoid saturation
characterized by even structure
without any clearance between the magnet and steel
for force applied at a right angle (pull-off, not shear)
in stable room temperature

Practical aspects of lifting capacity – factors

In practice, the real power results from many variables, presented from most significant:

Air gap (between the magnet and the plate), as even a very small distance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
Force direction – catalog parameter refers to detachment vertically. When attempting to slide, the magnet holds much less (often approx. 20-30% of nominal force).
Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
Material type – ideal substrate is pure iron steel. Hardened steels may generate lower lifting capacity.
Surface condition – smooth surfaces ensure maximum contact, which improves force. Rough surfaces reduce efficiency.
Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Lifting capacity was determined using a polished steel plate of optimal thickness (min. 20 mm), under perpendicular pulling force, whereas under shearing force the lifting capacity is smaller. In addition, even a slight gap between the magnet’s surface and the plate reduces the lifting capacity.

Safety rules for work with neodymium magnets

Crushing force

Large magnets can smash fingers instantly. Do not put your hand betwixt two strong magnets.

Powerful field

Before use, read the rules. Uncontrolled attraction can destroy the magnet or injure your hand. Be predictive.

Fire risk

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

Phone sensors

GPS units and smartphones are highly susceptible to magnetism. Close proximity with a strong magnet can ruin the internal compass in your phone.

Product not for children

Always store magnets out of reach of children. Choking hazard is significant, and the consequences of magnets connecting inside the body are fatal.

Metal Allergy

Medical facts indicate that nickel (the usual finish) is a common allergen. For allergy sufferers, prevent direct skin contact and choose coated magnets.

Material brittleness

Despite metallic appearance, neodymium is brittle and not impact-resistant. Avoid impacts, as the magnet may shatter into sharp, dangerous pieces.

ICD Warning

People with a ICD must maintain an absolute distance from magnets. The magnetism can disrupt the operation of the implant.

Maximum temperature

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

Protect data

Avoid bringing magnets close to a wallet, computer, or TV. The magnetic field can irreversibly ruin these devices and erase data from cards.

Attention! More info about risks in the article: Magnet Safety Guide.

UMGGZ 22x6 [M4] GZ / N38 - rubber magnetic holder external thread

Can't decide what to choose?

UMGGZ 22x6 [M4] GZ / N38 - rubber magnetic holder external thread

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Chemical composition

Sustainability

Magnet pull force

Field Strength

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UMS 42x12.5x6.5x9 / N38 - conical magnetic holder

MW 3x1 / N38 - cylindrical magnet

MPL 25x12.5x5 / N38 - lamellar magnet

UMGGW 22x6 [M4] GW / N38 - magnetic holder rubber internal thread

Strengths and weaknesses of rare earth magnets.

Pros

Weaknesses

Holding force characteristics

Breakaway strength of the magnet in ideal conditions – what it depends on?

Practical aspects of lifting capacity – factors

Crushing force

Powerful field

Fire risk

Phone sensors

Product not for children

Metal Allergy

Material brittleness

ICD Warning

Maximum temperature

Protect data

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C