← previous
next →
Product available Ships in 2 days

UMS 42x12.5x6.5x9 / N38 - conical magnetic holder

conical magnetic holder

Catalog no 220331

GTIN/EAN: 5906301814214

5.00

Diameter Ø

42 mm [±1 mm]

cone dimension Ø

12.5x6.5 mm [±1 mm]

Height

9 mm [±1 mm]

Weight

72 g

Magnetization Direction

↑ axial

Load capacity

37.00 kg / 362.85 N

Coating

[NiCuNi] Nickel

technical specifications »

27.06 ZŁ with VAT / pcs + price for transport

22.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
22.00 ZŁ
27.06 ZŁ
price from 20 pcs
18.70 ZŁ
23.00 ZŁ
price from 40 pcs
14.30 ZŁ
17.59 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Not sure about your choice?

Call us now +48 888 99 98 98 alternatively get in touch through request form the contact page.
Weight and form of a magnet can be reviewed on our power calculator.

Order by 14:00 and we’ll ship today!

Technical specification of the product - UMS 42x12.5x6.5x9 / N38 - conical magnetic holder

Specification / characteristics - UMS 42x12.5x6.5x9 / N38 - conical magnetic holder

properties
properties values
Cat. no. 220331
GTIN/EAN 5906301814214
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 42 mm [±1 mm]
cone dimension Ø 12.5x6.5 mm [±1 mm]
Height 9 mm [±1 mm]
Weight 72 g
Magnetization Direction ↑ axial
Load capacity ~ ? 37.00 kg / 362.85 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMS 42x12.5x6.5x9 / 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

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: 220331-2026
Measurement Calculator
Force (pull)
Magnetic Field
Just populate any input, and the calculator calculate the rest automatically.

Other products

SM 25x325 [2xM8] / N52 - magnetic separator
Product available Ships in 2 days

SM 25x325 [2xM8] / N52 - magnetic separator

984.00 ZŁ brutto / pcs
MW 33x30 / N38 - cylindrical magnet
Product available Ships in 2 days

MW 33x30 / N38 - cylindrical magnet

52.89 ZŁ brutto / pcs
SM 25x350 [2xM8] / N42 - magnetic separator
Product available Ships in 2 days

SM 25x350 [2xM8] / N42 - magnetic separator

984.00 ZŁ brutto / pcs
MP 14x8/4x3 / N38 - ring magnet
Product available Ships in 2 days

MP 14x8/4x3 / N38 - ring magnet

2.47 ZŁ brutto / pcs
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 42x12.5x6.5x9 / N38 will successfully hold inspection doors, tools in the workshop, or shop display elements.
Despite the steel housing, the magnet itself is prone to cracking under strong point pressure. 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.
To create a pair (magnet-magnet), you need one holder with an N pole on the chamfer and another with an S pole. In our offer, we try to mark or pair holders if explicitly stated in the description. A set of magnet + plate is cheaper and holds just as strongly.
The declared capacity (e.g., 37.00 kg) refers to the perpendicular force needed to detach the magnet from thick steel. 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.
Thanks to the metal cup, the magnetic field is concentrated on the active side, which significantly increases force. The housing absorbs impacts, preventing the magnet from crumbling and cracking. A bare ring has a dispersed field on both sides but is weaker in point holding.

Strengths and weaknesses of rare earth magnets.

Strengths

Besides their immense pulling force, neodymium magnets offer the following advantages:
  • They retain attractive force for nearly 10 years – the loss is just ~1% (according to analyses),
  • Neodymium magnets are exceptionally resistant to loss of magnetic properties caused by external magnetic fields,
  • A magnet with a metallic gold surface has better aesthetics,
  • The surface of neodymium magnets generates a intense magnetic field – this is a distinguishing feature,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Thanks to modularity in shaping and the ability to modify to client solutions,
  • Versatile presence in innovative solutions – they find application in hard drives, motor assemblies, medical equipment, also multitasking production systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Characteristics of disadvantages of neodymium magnets: application proposals
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only secures them against impacts but also increases their 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 stability even at temperatures up to 230°C
  • They rust in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • We suggest cover - magnetic mechanism, due to difficulties in realizing nuts inside the magnet and complicated shapes.
  • Possible danger related to microscopic parts of magnets can be dangerous, if swallowed, which gains importance in the context of child health protection. It is also worth noting that small components of these products can be problematic in diagnostics medical when they are in the body.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Maximum holding power of the magnet – what contributes to it?

Magnet power is the result of a measurement for ideal contact conditions, taking into account:
  • using a plate made of high-permeability steel, acting as a circuit closing element
  • whose thickness is min. 10 mm
  • characterized by lack of roughness
  • with direct contact (no impurities)
  • under perpendicular force direction (90-degree angle)
  • in temp. approx. 20°C

Magnet lifting force in use – key factors

It is worth knowing that the magnet holding will differ depending on the following factors, in order of importance:
  • Clearance – the presence of any layer (rust, tape, air) acts as an insulator, which lowers power steeply (even by 50% at 0.5 mm).
  • Load vector – highest force is available only during pulling at a 90° angle. The shear force of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
  • Wall thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Material composition – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
  • Surface condition – smooth surfaces ensure maximum contact, which increases force. Rough surfaces weaken the grip.
  • Thermal environment – temperature increase causes a temporary drop of force. It is worth remembering the thermal limit for a given model.

Lifting capacity was assessed with the use of a smooth steel plate of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the holding force is lower. Additionally, even a minimal clearance between the magnet’s surface and the plate lowers the holding force.

Precautions when working with neodymium magnets
GPS Danger

Be aware: neodymium magnets produce a field that confuses sensitive sensors. Keep a separation from your phone, device, and GPS.

Medical implants

People with a ICD have to maintain an safe separation from magnets. The magnetism can interfere with the functioning of the life-saving device.

Hand protection

Big blocks can break fingers instantly. Do not put your hand betwixt two strong magnets.

Fire risk

Combustion risk: Rare earth powder is explosive. Avoid machining magnets in home conditions as this may cause fire.

Eye protection

Neodymium magnets are sintered ceramics, which means they are very brittle. Clashing of two magnets will cause them breaking into small pieces.

Thermal limits

Regular neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. This process is irreversible.

Immense force

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

Avoid contact if allergic

A percentage of the population have a sensitization to nickel, which is the standard coating for NdFeB magnets. Frequent touching might lead to skin redness. We recommend wear safety gloves.

Protect data

Equipment safety: Neodymium magnets can ruin data carriers and delicate electronics (heart implants, hearing aids, mechanical watches).

Choking Hazard

Neodymium magnets are not intended for children. Eating multiple magnets can lead to them attracting across intestines, which poses a severe health hazard and necessitates immediate surgery.

Warning! Need more info? Check our post: Are neodymium magnets dangerous?