← previous

Product available Ships today (order by 14:00)

UMGGZ 66x8.5 [M8] GZ / N38 - rubber magnetic holder external thread

rubber magnetic holder external thread

Catalog no 340423

GTIN: 5906301814764

5.00

Diameter Ø

66 mm [±1 mm]

Height

8.5 mm [±1 mm]

Weight

100 g

Load capacity

18.40 kg / 180.44 N

23.37 ZŁ with VAT / pcs + price for transport

19.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs

19.00 ZŁ

23.37 ZŁ

price from 20 pcs

17.86 ZŁ

21.97 ZŁ

price from 50 pcs

16.72 ZŁ

20.57 ZŁ

Carbon Footprint – environmental impact GPSR Regulation – product safety

Need help making a decision?

Call us now +48 888 99 98 98 otherwise send us a note using request form through our site.
Parameters along with appearance of a neodymium magnet can be verified on our modular calculator.

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

UMGGZ 66x8.5 [M8] GZ / N38 - rubber magnetic holder external thread

Specification / characteristics UMGGZ 66x8.5 [M8] GZ / N38 - rubber magnetic holder external thread

properties

properties	values
Cat. no.	340423
GTIN	5906301814764
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	66 mm [±1 mm]
Height	8.5 mm [±1 mm]
Weight	100 g
Load capacity ~ ?	18.40 kg / 180.44 N
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMGGZ 66x8.5 [M8] 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	T
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 106	°C^-1
Thermal expansion perpendicular (⊥) to orientation (M)	-(1-3) x 10-6	°C^-1
Young's modulus	1.7 x 104	kg/mm²

Quick Unit Converter

Force (Pull)

Force (N)

Pounds (lbs)

Field Strength

Input data in any box, to see the remaining fields convert automatically.

View more deals

Product available Ships today (order by 14:00)

MPL 30x15x10 / N38 - lamellar magnet

24.48 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

UMP 97x40 [M8+M10] GW F300 Lina / N38 - search holder

370.00 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread

9.84 ZŁ brutto / pcs

Product available Ships today (order by 14:00)

MW 22x6 / N38 - cylindrical magnet

6.11 ZŁ brutto / pcs

The protruding thread allows instant screwing of a lamp or holder using a nut. It is a safe and durable mounting without drilling holes in the bodywork.

It can be safely used outdoors all year round, in rain, snow, and frost. The rubber is resistant to UV radiation and does not crack in the sun.

Soft rubber provides a barrier between the hard magnet and the paint, eliminating the risk of scratches. A clean surface under the magnet guarantees no scratches and maximum adhesion.

The thread size is standard and fits typical nuts available in hardware stores. The stud is an integral part of the steel base and cannot be unscrewed.

Although nominal capacity (e.g., 18.40 kg) is lower than a bare magnet, real adhesion on slippery paint is much better. Model UMGGZ 66x8.5 [M8] GZ / N38 is adapted to hold elements at road speeds if you choose the right number of mounting points.

Strengths and weaknesses of Nd₂Fe₁₄B magnets.

Strengths

Besides their magnetic performance, neodymium magnets are valued for these benefits:

They do not lose power, even over nearly 10 years – the reduction in lifting capacity is only ~1% (according to tests),
They are extremely resistant to demagnetization induced by external magnetic fields,
The use of an shiny finish of noble metals (nickel, gold, silver) causes the element to look better,
They feature high magnetic induction at the operating surface, which increases their power,
Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
Possibility of individual modeling and modifying to precise applications,
Wide application in innovative solutions – they are utilized in hard drives, drive modules, precision medical tools, as well as modern systems.
Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Weaknesses

Disadvantages of NdFeB magnets:

To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
When exposed to high temperature, neodymium magnets experience 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
They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
We suggest a housing - magnetic mount, due to difficulties in realizing threads inside the magnet and complex forms.
Possible danger resulting from small fragments of magnets can be dangerous, when accidentally swallowed, which becomes key in the context of child health protection. Furthermore, small components of these products can complicate diagnosis medical after entering the body.
High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Optimal lifting capacity of a neodymium magnet – what it depends on?

The specified lifting capacity concerns the limit force, recorded under optimal environment, specifically:

using a plate made of high-permeability steel, acting as a circuit closing element
with a cross-section of at least 10 mm
characterized by smoothness
under conditions of gap-free contact (surface-to-surface)
for force acting at a right angle (in the magnet axis)
in stable room temperature

Impact of factors on magnetic holding capacity in practice

In practice, the actual lifting capacity depends on many variables, listed from crucial:

Gap between surfaces – every millimeter of distance (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
Load vector – highest force is reached only during pulling at a 90° angle. The shear force of the magnet along the plate is standardly many times lower (approx. 1/5 of the lifting capacity).
Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the attraction force (the magnet "punches through" it).
Plate material – low-carbon steel gives the best results. Alloy steels decrease magnetic permeability and lifting capacity.
Smoothness – full contact is obtained only on smooth steel. Rough texture create air cushions, weakening the magnet.
Heat – NdFeB sinters have a sensitivity to temperature. At higher temperatures they are weaker, and in frost they can be stronger (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a small distance between the magnet and the plate reduces the load capacity.

Warnings

Finger safety

Protect your hands. Two powerful magnets will snap together instantly with a force of several hundred kilograms, destroying everything in their path. Be careful!

Electronic hazard

Equipment safety: Neodymium magnets can ruin payment cards and delicate electronics (pacemakers, hearing aids, mechanical watches).

ICD Warning

For implant holders: Powerful magnets affect electronics. Keep at least 30 cm distance or request help to handle the magnets.

Handling rules

Be careful. Rare earth magnets attract from a distance and connect with huge force, often faster than you can react.

Metal Allergy

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 choose versions in plastic housing.

Compass and GPS

GPS units and mobile phones are highly sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can permanently damage the sensors in your phone.

Beware of splinters

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

Heat sensitivity

Standard neodymium magnets (grade N) lose power when the temperature surpasses 80°C. Damage is permanent.

Product not for children

Strictly keep magnets out of reach of children. Risk of swallowing is high, and the effects of magnets connecting inside the body are fatal.

Flammability

Fire hazard: Neodymium dust is highly flammable. Avoid machining magnets in home conditions as this risks ignition.

Warning! More info about hazards in the article: Safety of working with magnets.

UMGGZ 66x8.5 [M8] GZ / N38 - rubber magnetic holder external thread

Need help making a decision?

UMGGZ 66x8.5 [M8] GZ / N38 - rubber magnetic holder external thread

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Force (Pull)

Field Strength

View more deals

MPL 30x15x10 / N38 - lamellar magnet

UMP 97x40 [M8+M10] GW F300 Lina / N38 - search holder

UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread

MW 22x6 / N38 - cylindrical magnet

Strengths and weaknesses of Nd2Fe14B magnets.

Strengths

Weaknesses

Lifting parameters

Optimal lifting capacity of a neodymium magnet – what it depends on?

Impact of factors on magnetic holding capacity in practice

Finger safety

Electronic hazard

ICD Warning

Handling rules

Metal Allergy

Compass and GPS

Beware of splinters

Heat sensitivity

Product not for children

Flammability

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Strengths and weaknesses of Nd₂Fe₁₄B magnets.