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

product specifications »

44.92 ZŁ with VAT / pcs + price for transport

36.52 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Pick up the phone and ask +48 888 99 98 98 otherwise send us a note by means of inquiry form the contact section.
Specifications as well as shape of a neodymium magnet can be reviewed using our magnetic mass calculator.

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Detailed specification - 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

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%

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: 220403-2026

Measurement Calculator

Force (pull)

Force in kg

Force (N)

lbs

Magnetic Field

Induction (T)

Type your figure in any box, and the remaining fields convert instantly.

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Countersunk magnets are indispensable in carpentry, furniture making, and modeling as hidden closures. The holder can be screwed directly to wood, wall, metal, or plastic. The steel cup strengthens the magnet force and protects it from cracking upon impact.

Despite the steel housing, the magnet itself is prone to cracking under strong point pressure. Avoid forceful tightening when you feel resistance. Using too large a countersunk screw may cause the magnetic ring to crack.

Two identical magnets (e.g., both N) bought randomly will repel each other with mounting sides. If you need a pair, ask about availability of complementary sets or check the description. Mounting a magnet to a plate eliminates the problem of matching poles and is easier.

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. Paint or veneer on metal also reduces effective attraction force.

The steel housing (cup/pot) acts as a magnetic shield, directing all power to the front of the holder. Furthermore, steel protects the brittle neodymium from mechanical damage when closing cabinets (impacts). The countersunk holder is a professional mounting solution with increased durability.

Pros as well as cons of neodymium magnets.

Pros

In addition to their magnetic capacity, neodymium magnets provide the following advantages:

They retain magnetic properties for almost 10 years – the loss is just ~1% (based on simulations),
Magnets very well resist against demagnetization caused by external fields,
By covering with a lustrous coating of silver, the element has an aesthetic look,
Magnets are characterized by very high magnetic induction on the outer layer,
Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
Possibility of custom creating and modifying to individual requirements,
Key role in innovative solutions – they are utilized in hard drives, motor assemblies, diagnostic systems, also technologically advanced constructions.
Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in small dimensions, which enables their usage in compact constructions

Limitations

Drawbacks and weaknesses of neodymium magnets: application proposals

They are prone to damage upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also improves its resistance to damage
Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
Due to limitations in producing threads and complicated shapes in magnets, we recommend using a housing - magnetic mount.
Health risk resulting from small fragments of magnets can be dangerous, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these devices are able to disrupt the diagnostic process medical in case of swallowing.
With budget limitations the cost of neodymium magnets can be a barrier,

Lifting parameters

Maximum magnetic pulling force – what affects it?

The declared magnet strength concerns the limit force, recorded under optimal environment, meaning:

using a sheet made of mild steel, functioning as a magnetic yoke
whose transverse dimension equals approx. 10 mm
with an ground touching surface
without the slightest air gap between the magnet and steel
for force applied at a right angle (in the magnet axis)
at temperature room level

Impact of factors on magnetic holding capacity in practice

Bear in mind that the magnet holding will differ depending on elements below, starting with the most relevant:

Distance – existence of foreign body (paint, dirt, gap) interrupts the magnetic circuit, which lowers power steeply (even by 50% at 0.5 mm).
Direction of force – highest force is obtained only during pulling at a 90° angle. The force required to slide of the magnet along the surface is standardly many times smaller (approx. 1/5 of the lifting capacity).
Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
Steel type – mild steel attracts best. Alloy steels reduce magnetic permeability and holding force.
Surface quality – the more even the surface, the larger the contact zone and higher the lifting capacity. Unevenness acts like micro-gaps.
Thermal conditions – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and in frost they can be stronger (up to a certain limit).

Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under parallel forces the lifting capacity is smaller. In addition, even a slight gap between the magnet and the plate decreases the load capacity.

Safety rules for work with NdFeB magnets

Allergic reactions

It is widely known that nickel (the usual finish) is a common allergen. If your skin reacts to metals, refrain from direct skin contact and opt for coated magnets.

Data carriers

Do not bring magnets close to a purse, laptop, or TV. The magnetism can destroy these devices and erase data from cards.

Pinching danger

Big blocks can crush fingers instantly. Never place your hand betwixt two attracting surfaces.

Precision electronics

Be aware: neodymium magnets produce a field that confuses precision electronics. Keep a safe distance from your phone, device, and GPS.

Heat warning

Watch the temperature. Exposing the magnet to high heat will ruin its properties and strength.

Do not give to children

Adult use only. Tiny parts can be swallowed, causing intestinal necrosis. Store out of reach of kids and pets.

Fire risk

Mechanical processing of neodymium magnets poses a fire hazard. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Magnets are brittle

Neodymium magnets are ceramic materials, which means they are fragile like glass. Impact of two magnets will cause them breaking into small pieces.

Health Danger

For implant holders: Powerful magnets disrupt electronics. Maintain at least 30 cm distance or ask another person to handle the magnets.

Immense force

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

Danger! Need more info? Check our post: Why are neodymium magnets dangerous?

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

Detailed specification - 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

Ecology and recycling (GPSR)

Force (pull)

Magnetic Field

Other proposals

SM 25x100 [2xM8] / N42 - magnetic separator

MW 40x10 / N38 - cylindrical magnet

MPL 15x10x2 / N38 - lamellar magnet

SM 32x250 [2xM8] / N42 - magnetic separator

Pros as well as cons of neodymium magnets.

Pros

Limitations

Lifting parameters

Maximum magnetic pulling force – what affects it?

Impact of factors on magnetic holding capacity in practice

Safety rules for work with NdFeB magnets

Allergic reactions

Data carriers

Pinching danger

Precision electronics

Heat warning

Do not give to children

Fire risk

Magnets are brittle

Health Danger

Immense force

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C