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

product 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

Want to talk magnets?

Pick up the phone and ask +48 22 499 98 98 alternatively let us know by means of request form the contact section.
Parameters and form of neodymium magnets can be calculated on our force calculator.

Same-day processing for orders placed before 14:00.

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

Technical specification and ecology

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%

Environmental data

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

Magnet Unit Converter

Pulling force

Kilograms (kg)

Force (N)

lbs

Field Strength

Induction (Gs)

Tesla (T)

Simply fill in one field, to let the tool calculate everything else instantly.

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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. 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. Often a more convenient and cheaper solution is using one magnet and a steel washer (plate) as an armature. Mounting a magnet to a plate eliminates the problem of matching poles and is easier.

This value is the maximum achievement a magnet can obtain on a thick sheet. 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.

A magnet in a housing is stronger on one side (from the chamfer side) than a bare magnet of the same dimensions. It is a more durable and safer solution in everyday use than a bare ring. A bare ring has a dispersed field on both sides but is weaker in point holding.

Pros as well as cons of Nd₂Fe₁₄B magnets.

Strengths

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

They retain attractive force for almost ten years – the drop is just ~1% (based on simulations),
They show high resistance to demagnetization induced by external magnetic fields,
A magnet with a metallic nickel surface looks better,
They are known for high magnetic induction at the operating surface, which increases their power,
Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures approaching 230°C and above...
Possibility of accurate forming and optimizing to precise conditions,
Versatile presence in modern technologies – they serve a role in magnetic memories, drive modules, advanced medical instruments, also industrial machines.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Disadvantages

Disadvantages of neodymium magnets:

They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only protects 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
Magnets exposed to a humid environment can rust. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
Limited possibility of creating nuts in the magnet and complicated forms - recommended is casing - magnetic holder.
Health risk related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the context of child health protection. Additionally, small components of these products are able to complicate diagnosis medical after entering the body.
Due to complex production process, their price is higher than average,

Lifting parameters

Maximum lifting force for a neodymium magnet – what affects it?

The specified lifting capacity concerns the maximum value, obtained under optimal environment, meaning:

on a plate made of mild steel, perfectly concentrating the magnetic flux
with a thickness no less than 10 mm
with a plane cleaned and smooth
without any insulating layer between the magnet and steel
for force applied at a right angle (in the magnet axis)
in stable room temperature

Lifting capacity in practice – influencing factors

Please note that the application force may be lower depending on elements below, starting with the most relevant:

Distance (between the magnet and the metal), as even a tiny distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
Direction of force – maximum parameter is reached only during pulling at a 90° angle. The shear force of the magnet along the surface is typically many times smaller (approx. 1/5 of the lifting capacity).
Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of converting into lifting capacity.
Plate material – low-carbon steel attracts best. Alloy steels lower magnetic permeability and holding force.
Surface finish – full contact is obtained only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
Heat – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures they can be stronger (up to a certain limit).

Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, in contrast under parallel forces the holding force is lower. Moreover, even a small distance between the magnet and the plate decreases the lifting capacity.

Safety rules for work with NdFeB magnets

Operating temperature

Watch the temperature. Heating the magnet above 80 degrees Celsius will permanently weaken its properties and strength.

GPS and phone interference

GPS units and smartphones are extremely susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can permanently damage the internal compass in your phone.

Magnet fragility

NdFeB magnets are ceramic materials, meaning they are very brittle. Collision of two magnets leads to them shattering into small pieces.

Dust explosion hazard

Fire warning: Neodymium dust is explosive. Do not process magnets in home conditions as this may cause fire.

Metal Allergy

Studies show that nickel (the usual finish) is a common allergen. If you have an allergy, prevent direct skin contact or select encased magnets.

Safe distance

Avoid bringing magnets close to a purse, computer, or screen. The magnetic field can irreversibly ruin these devices and wipe information from cards.

Danger to the youngest

Only for adults. Small elements can be swallowed, causing serious injuries. Keep out of reach of kids and pets.

Immense force

Use magnets with awareness. Their powerful strength can shock even experienced users. Plan your moves and do not underestimate their force.

Pinching danger

Risk of injury: The attraction force is so immense that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Medical interference

For implant holders: Strong magnetic fields affect electronics. Maintain at least 30 cm distance or ask another person to handle the magnets.

Attention! Learn more about risks 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

Chemical composition

Environmental data

Pulling force

Field Strength

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SM 18x200 [2xM5] / N42 - magnetic separator

UI 45x13x6 [Z323] / N38 - badge holder

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MW 18.9x10 / N38 - cylindrical magnet

Pros as well as cons of Nd2Fe14B magnets.

Strengths

Disadvantages

Lifting parameters

Maximum lifting force for a neodymium magnet – what affects it?

Lifting capacity in practice – influencing factors

Safety rules for work with NdFeB magnets

Operating temperature

GPS and phone interference

Magnet fragility

Dust explosion hazard

Metal Allergy

Safe distance

Danger to the youngest

Immense force

Pinching danger

Medical interference

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C

Pros as well as cons of Nd₂Fe₁₄B magnets.