UMS 20x8.6x4.5x7 / N38 - conical magnetic holder

Product available Ships tomorrow

UMS 20x8.6x4.5x7 / 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 220327

GTIN/EAN: 5906301814177

5.00

Diameter Ø

20 mm [±1 mm]

cone dimension Ø

8.6x4.5 mm [±1 mm]

Height

7 mm [±1 mm]

Weight

12 g

Magnetization Direction

↑ axial

Load capacity

6.00 kg / 58.84 N

Coating

[NiCuNi] Nickel

view properties »

6.46 ZŁ with VAT / pcs + price for transport

5.25 ZŁ net + 23% VAT / pcs

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Technical data of the product - UMS 20x8.6x4.5x7 / N38 - conical magnetic holder

Specification / characteristics - UMS 20x8.6x4.5x7 / N38 - conical magnetic holder

properties

properties	values
Cat. no.	220327
GTIN/EAN	5906301814177
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	20 mm [±1 mm]
cone dimension Ø	8.6x4.5 mm [±1 mm]
Height	7 mm [±1 mm]
Weight	12 g
Magnetization Direction	↑ axial
Load capacity ~ ?	6.00 kg / 58.84 N
Coating	[NiCuNi] Nickel
Manufacturing Tolerance	±1 mm

Magnetic properties of material N38

Specification / characteristics UMS 20x8.6x4.5x7 / 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

Elemental analysis

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: 220327-2026

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This type of holder is perfect for mounting magnetic latches in cabinets, doors, and flaps. The ability to flush the screw with the magnet surface allows for perfect closing without gaps. Model UMS 20x8.6x4.5x7 / 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. The screw head should not protrude above the magnet surface, but it cannot burst it either.

For two magnets screwed with cones facing each other (faces) to attract, they must have different polarity. In our offer, we try to mark or pair holders if explicitly stated in the description. Mounting a magnet to a plate eliminates the problem of matching poles and is easier.

The declared capacity (e.g., 6.00 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). 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. The countersunk holder is a professional mounting solution with increased durability.

Strengths as well as weaknesses of rare earth magnets.

Strengths

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

They retain attractive force for around 10 years – the loss is just ~1% (based on simulations),
They feature excellent resistance to weakening of magnetic properties due to external magnetic sources,
In other words, due to the aesthetic surface of gold, the element looks attractive,
Neodymium magnets generate maximum magnetic induction on a their surface, which ensures high operational effectiveness,
Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
Thanks to the option of accurate shaping and adaptation to individualized requirements, magnetic components can be produced in a broad palette of shapes and sizes, which amplifies use scope,
Universal use in future technologies – they are used in mass storage devices, motor assemblies, precision medical tools, also technologically advanced constructions.
Compactness – despite small sizes they generate large force, making them ideal for precision applications

Limitations

Characteristics of disadvantages of neodymium magnets: weaknesses and usage proposals

They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
Magnets exposed to a humid environment can rust. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
Limited ability of creating threads in the magnet and complex shapes - preferred is casing - mounting mechanism.
Health risk related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the context of child health protection. It is also worth noting that small components of these products are able to complicate diagnosis medical in case of swallowing.
High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Pull force analysis

Maximum magnetic pulling force – what affects it?

Holding force of 6.00 kg is a measurement result executed under standard conditions:

on a base made of structural steel, optimally conducting the magnetic flux
possessing a thickness of at least 10 mm to ensure full flux closure
with an ground touching surface
without the slightest clearance between the magnet and steel
for force applied at a right angle (in the magnet axis)
at room temperature

Practical lifting capacity: influencing factors

Effective lifting capacity impacted by specific conditions, mainly (from priority):

Clearance – existence of foreign body (paint, tape, gap) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
Direction of force – maximum parameter is available only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
Substrate thickness – for full efficiency, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
Material type – the best choice is high-permeability steel. Cast iron may attract less.
Plate texture – ground elements guarantee perfect abutment, which increases field saturation. Uneven metal reduce efficiency.
Thermal environment – heating the magnet results in weakening of force. It is worth remembering the maximum operating temperature for a given model.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, however under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate decreases the load capacity.

Warnings

Operating temperature

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

Keep away from children

Product intended for adults. Tiny parts can be swallowed, causing intestinal necrosis. Keep away from children and animals.

Serious injuries

Watch your fingers. Two powerful magnets will join instantly with a force of massive weight, crushing anything in their path. Exercise extreme caution!

Handling rules

Handle with care. Rare earth magnets act from a long distance and snap with massive power, often quicker than you can move away.

Keep away from electronics

A strong magnetic field interferes with the functioning of magnetometers in phones and navigation systems. Maintain magnets near a smartphone to prevent damaging the sensors.

Warning for allergy sufferers

Allergy Notice: The nickel-copper-nickel coating contains nickel. If skin irritation occurs, immediately stop handling magnets and use protective gear.

Implant safety

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

Dust explosion hazard

Powder created during grinding of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Eye protection

Protect your eyes. Magnets can fracture upon uncontrolled impact, launching shards into the air. Eye protection is mandatory.

Threat to electronics

Intense magnetic fields can corrupt files on credit cards, hard drives, and storage devices. Keep a distance of at least 10 cm.

Caution! Looking for details? Read our article: Are neodymium magnets dangerous?

UMS 20x8.6x4.5x7 / N38 - conical magnetic holder

Technical data of the product - UMS 20x8.6x4.5x7 / N38 - conical magnetic holder

Magnetic properties of material N38

Physical properties of sintered neodymium magnets Nd2Fe14B at 20°C

Elemental analysis

Ecology and recycling (GPSR)

Force (pull)

Field Strength

Other proposals

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

SM 18x225 [2xM5] / N42 - magnetic separator

UMGGZ 43x6 [M6] GZ / N38 - rubber magnetic holder external thread

MP 15x7/3.5x5 / N38 - ring magnet

Strengths as well as weaknesses of rare earth magnets.

Strengths

Limitations

Pull force analysis

Maximum magnetic pulling force – what affects it?

Practical lifting capacity: influencing factors

Warnings

Operating temperature

Keep away from children

Serious injuries

Handling rules

Keep away from electronics

Warning for allergy sufferers

Implant safety

Dust explosion hazard

Eye protection

Threat to electronics

Physical properties of sintered neodymium magnets Nd₂Fe₁₄B at 20°C