UMS 48x18x8.5x11.5 / N38 - conical magnetic holder

Product available Ships today (order by 14:00)

UMS 48x18x8.5x11.5 / N38 - conical magnetic holder

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

conical magnetic holder

Catalog no 220403

GTIN/EAN: 5906301814221

5.00

Diameter Ø

48 mm [±1 mm]

cone dimension Ø

18x8.5 mm [±1 mm]

Height

11.5 mm [±1 mm]

Weight

125 g

Magnetization Direction

↑ axial

Load capacity

68.00 kg / 666.85 N

Coating

[NiCuNi] Nickel

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44.92 ZŁ with VAT / pcs + price for transport

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Technical details - UMS 48x18x8.5x11.5 / N38 - conical magnetic holder

Specification / characteristics - UMS 48x18x8.5x11.5 / N38 - conical magnetic holder

properties

properties	values
Cat. no.	220403
GTIN/EAN	5906301814221
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	48 mm [±1 mm]
cone dimension Ø	18x8.5 mm [±1 mm]
Height	11.5 mm [±1 mm]
Weight	125 g
Magnetization Direction	↑ axial
Load capacity ~ ?	68.00 kg / 666.85 N
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMS 48x18x8.5x11.5 / N38 - conical magnetic holder

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

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: 220403-2026

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Kilograms (kg)

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It is the most popular solution for creating aesthetic, invisible door locks. The holder can be screwed directly to wood, wall, metal, or plastic. Model UMS 48x18x8.5x11.5 / N38 will successfully hold inspection doors, tools in the workshop, or shop display elements.

Remember that neodymium breaks easily if the screw is tightened too hard. We recommend tightening manually with feeling (screwdriver), not an impact driver. The screw head should not protrude above the magnet surface, but it cannot burst it either.

Two identical magnets (e.g., both N) bought randomly will repel each other with mounting sides. Often a more convenient and cheaper solution is using one magnet and a steel washer (plate) as an armature. A set of magnet + plate is cheaper and holds just as strongly.

This force is measured in ideal laboratory conditions when pulling at a 90-degree angle. To increase friction and prevent sliding, it is worth sticking a piece of rubber or anti-slip tape on the magnet. When selecting a magnet for a cabinet, remember that the air gap (e.g., bumpers, seals) weakens the grip.

A magnet in a housing is stronger on one side (from the chamfer side) than a bare magnet of the same dimensions. Furthermore, steel protects the brittle neodymium from mechanical damage when closing cabinets (impacts). The countersunk holder is a professional mounting solution with increased durability.

Advantages as well as disadvantages of rare earth magnets.

Benefits

Apart from their superior power, neodymium magnets have these key benefits:

They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (in laboratory conditions),
Magnets perfectly resist against demagnetization caused by external fields,
Thanks to the smooth finish, the layer of nickel, gold-plated, or silver-plated gives an modern appearance,
Magnetic induction on the working part of the magnet turns out to be impressive,
Through (adequate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures approaching 230°C and above...
Thanks to the possibility of accurate shaping and customization to custom requirements, NdFeB magnets can be manufactured in a variety of geometric configurations, which expands the range of possible applications,
Fundamental importance in future technologies – they find application in HDD drives, electric motors, medical devices, as well as complex engineering applications.
Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in miniature devices

Cons

What to avoid - cons of neodymium magnets and proposals for their use:

They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength 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
Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
Due to limitations in creating threads and complex forms in magnets, we propose using cover - magnetic mount.
Potential hazard resulting from small fragments of magnets are risky, in case of ingestion, which gains importance in the context of child safety. Additionally, tiny parts of these devices are able to complicate diagnosis medical after entering the body.
Due to expensive raw materials, their price is higher than average,

Lifting parameters

Magnetic strength at its maximum – what affects it?

Magnet power is the result of a measurement for optimal configuration, taking into account:

on a base made of structural steel, perfectly concentrating the magnetic field
with a cross-section minimum 10 mm
characterized by even structure
under conditions of ideal adhesion (metal-to-metal)
for force acting at a right angle (pull-off, not shear)
in stable room temperature

Practical aspects of lifting capacity – factors

During everyday use, the actual lifting capacity depends on several key aspects, listed from crucial:

Gap (between the magnet and the metal), since even a tiny distance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
Pull-off angle – note that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the maximum value.
Steel thickness – too thin steel causes magnetic saturation, causing part of the flux to be escaped to the other side.
Metal type – not every steel reacts the same. High carbon content weaken the interaction with the magnet.
Plate texture – smooth surfaces ensure maximum contact, which increases field saturation. Uneven metal reduce efficiency.
Heat – neodymium magnets have a sensitivity to temperature. At higher temperatures they lose power, and in frost gain strength (up to a certain limit).

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under attempts to slide the magnet the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet and the plate reduces the holding force.

Safety rules for work with NdFeB magnets

Warning for allergy sufferers

A percentage of the population suffer from a hypersensitivity to Ni, which is the common plating for neodymium magnets. Extended handling may cause dermatitis. We recommend use protective gloves.

Eye protection

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching sharp fragments into the air. We recommend safety glasses.

Product not for children

Product intended for adults. Small elements can be swallowed, causing severe trauma. Keep out of reach of kids and pets.

Safe operation

Exercise caution. Rare earth magnets attract from a distance and connect with massive power, often quicker than you can react.

Data carriers

Powerful magnetic fields can destroy records on payment cards, HDDs, and storage devices. Maintain a gap of at least 10 cm.

Compass and GPS

A powerful magnetic field negatively affects the operation of compasses in smartphones and navigation systems. Do not bring magnets close to a smartphone to avoid breaking the sensors.

Heat sensitivity

Regular neodymium magnets (N-type) lose power when the temperature surpasses 80°C. The loss of strength is permanent.

Life threat

Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Finger safety

Danger of trauma: The pulling power is so immense that it can cause blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Do not drill into magnets

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

Caution! Need more info? Read our article: Why are neodymium magnets dangerous?

UMS 48x18x8.5x11.5 / N38 - conical magnetic holder

Technical details - UMS 48x18x8.5x11.5 / N38 - conical magnetic holder

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Chemical composition

Sustainability

Pulling force

Field Strength

View also proposals

MPL 50x20x10 / N38 - lamellar magnet

MPL 60x10x5 / N38 - lamellar magnet

HH 20x7.2 [M4] / N38 - through hole magnetic holder

SM 32x400 [2xM8] / N42 - magnetic separator

Advantages as well as disadvantages of rare earth magnets.

Benefits

Cons

Lifting parameters

Magnetic strength at its maximum – what affects it?

Practical aspects of lifting capacity – factors

Safety rules for work with NdFeB magnets

Warning for allergy sufferers

Eye protection

Product not for children

Safe operation

Data carriers

Compass and GPS

Heat sensitivity

Life threat

Finger safety

Do not drill into magnets

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C