UMS 16x6.5x3.5x5 / N38 - conical magnetic holder

Product available Ships tomorrow

UMS 16x6.5x3.5x5 / 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 220326

GTIN/EAN: 5906301814160

5.00

Diameter Ø

16 mm [±1 mm]

cone dimension Ø

6.5x3.5 mm [±1 mm]

Height

5 mm [±1 mm]

Weight

5.5 g

Magnetization Direction

↑ axial

Load capacity

5.00 kg / 49.03 N

Coating

[NiCuNi] Nickel

technical parameters »

4.48 ZŁ with VAT / pcs + price for transport

3.64 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety

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Detailed specification - UMS 16x6.5x3.5x5 / N38 - conical magnetic holder

Specification / characteristics - UMS 16x6.5x3.5x5 / N38 - conical magnetic holder

properties

properties	values
Cat. no.	220326
GTIN/EAN	5906301814160
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	16 mm [±1 mm]
cone dimension Ø	6.5x3.5 mm [±1 mm]
Height	5 mm [±1 mm]
Weight	5.5 g
Magnetization Direction	↑ axial
Load capacity ~ ?	5.00 kg / 49.03 N
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMS 16x6.5x3.5x5 / 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

Material specification

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: 220326-2026

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Kilograms (kg)

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Countersunk magnets are indispensable in carpentry, furniture making, and modeling as hidden closures. Thanks to the hole with a chamfer (conical), the screw head hides in the magnet, ensuring a flat contact surface. Model UMS 16x6.5x3.5x5 / 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. It is best to use a screw with a countersunk head perfectly matched to the hole. 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. 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.

The declared capacity (e.g., 5.00 kg) refers to the perpendicular force needed to detach the magnet from thick steel. In practice, when mounted on a wall (shear force), the magnet will hold significantly less (approx. 20-30% of nominal). When selecting a magnet for a cabinet, remember that the air gap (e.g., bumpers, seals) weakens the grip.

The steel housing (cup/pot) acts as a magnetic shield, directing all power to the front of the holder. The housing absorbs impacts, preventing the magnet from crumbling and cracking. The countersunk holder is a professional mounting solution with increased durability.

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.

Benefits

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

They have constant strength, and over nearly ten years their performance decreases symbolically – ~1% (in testing),
Neodymium magnets prove to be exceptionally resistant to demagnetization caused by external interference,
By using a lustrous layer of silver, the element has an modern look,
Magnetic induction on the working part of the magnet turns out to be very high,
Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
In view of the potential of flexible molding and adaptation to custom projects, NdFeB magnets can be modeled in a broad palette of shapes and sizes, which increases their versatility,
Significant place in innovative solutions – they are commonly used in hard drives, brushless drives, medical equipment, and technologically advanced constructions.
Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in miniature devices

Limitations

Disadvantages of NdFeB magnets:

To avoid cracks upon strong impacts, we recommend using special steel holders. Such a solution secures the magnet and simultaneously improves its durability.
Neodymium magnets decrease their power 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 durability even at temperatures up to 230°C
Magnets exposed to a humid environment can rust. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
We recommend casing - magnetic mount, due to difficulties in producing threads inside the magnet and complex shapes.
Possible danger to health – tiny shards of magnets are risky, if swallowed, which becomes key in the context of child health protection. It is also worth noting that small components of these magnets can disrupt the diagnostic process medical when they are in the body.
Due to neodymium price, their price is higher than average,

Lifting parameters

Highest magnetic holding force – what affects it?

Magnet power was defined for the most favorable conditions, including:

on a plate made of mild steel, optimally conducting the magnetic flux
whose transverse dimension equals approx. 10 mm
with an ideally smooth contact surface
under conditions of no distance (surface-to-surface)
for force applied at a right angle (in the magnet axis)
in stable room temperature

Key elements affecting lifting force

In real-world applications, the actual lifting capacity depends on a number of factors, listed from most significant:

Gap (betwixt the magnet and the metal), since even a very small clearance (e.g. 0.5 mm) leads to a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
Direction of force – highest force is available only during perpendicular pulling. The shear force of the magnet along the surface is usually several times lower (approx. 1/5 of the lifting capacity).
Substrate thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
Material composition – different alloys attracts identically. High carbon content weaken the attraction effect.
Surface quality – the more even the surface, the better the adhesion and stronger the hold. Roughness creates an air distance.
Thermal factor – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was measured by applying a polished steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under attempts to slide the magnet the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate decreases the holding force.

H&S for magnets

Precision electronics

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

Machining danger

Drilling and cutting of NdFeB material carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is hard to extinguish.

Nickel allergy

Nickel alert: The nickel-copper-nickel coating contains nickel. If redness appears, cease working with magnets and wear gloves.

Maximum temperature

Do not overheat. Neodymium magnets are sensitive to heat. If you require operation above 80°C, look for HT versions (H, SH, UH).

Beware of splinters

Despite the nickel coating, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.

Swallowing risk

These products are not intended for children. Eating several magnets can lead to them connecting inside the digestive tract, which poses a severe health hazard and necessitates urgent medical intervention.

Magnetic media

Equipment safety: Strong magnets can ruin payment cards and sensitive devices (pacemakers, medical aids, mechanical watches).

Pinching danger

Pinching hazard: The attraction force is so immense that it can cause blood blisters, crushing, and broken bones. Protective gloves are recommended.

Handling guide

Handle magnets consciously. Their powerful strength can surprise even professionals. Stay alert and respect their force.

Warning for heart patients

Individuals with a heart stimulator have to keep an safe separation from magnets. The magnetism can stop the functioning of the implant.

Danger! Learn more about hazards in the article: Magnet Safety Guide.

UMS 16x6.5x3.5x5 / N38 - conical magnetic holder

Detailed specification - UMS 16x6.5x3.5x5 / N38 - conical magnetic holder

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Material specification

Ecology and recycling (GPSR)

Magnet pull force

Magnetic Induction

Other deals

MW 10x3 / N38 - cylindrical magnet

UMGGZ 34x6 [M4] GZ / N38 - rubber magnetic holder external thread

UMP 67x28 [M8+M10] GW F120 Lina / N38 - search holder

MPL 20x10x1 / N38 - lamellar magnet

Advantages as well as disadvantages of Nd2Fe14B magnets.

Benefits

Limitations

Lifting parameters

Highest magnetic holding force – what affects it?

Key elements affecting lifting force

H&S for magnets

Precision electronics

Machining danger

Nickel allergy

Maximum temperature

Beware of splinters

Swallowing risk

Magnetic media

Pinching danger

Handling guide

Warning for heart patients

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Advantages as well as disadvantages of Nd₂Fe₁₄B magnets.