FAQ
Order Status

tel: +48 22 499 98 98

Strong neodymium magnets: discs and cylinders

Need reliable magnetic field? We have in stock wide selection of various shapes and sizes. They are ideal for domestic applications, workshop and industrial tasks. See products available immediately.

see full offer

Equipment for treasure hunters

Discover your passion related to seabed exploration! Our specialized grips (F200, F400) provide safety guarantee and immense power. Stainless steel construction and strong lines will perform in any water.

choose your water magnet

Industrial magnetic grips industrial

Proven solutions for fixing non-invasive. Threaded mounts (external or internal) provide instant organization of work on production halls. They are indispensable installing lighting, sensors and banners.

check industrial applications

🚚 Order by 14:00 – we'll ship today!

Dhit sp. z o.o.
0
0.00 ZŁ
  1. home
  2. cylindrical magnetic handles for screw heads type-b
  3. cylindrical holder umc 48x11/7x11.5 / n38
← previous
next →
Product available Ships today (order by 14:00)

UMC 48x11/7x11.5 / N38 - cylindrical magnetic holder

cylindrical magnetic holder

Catalog no 320412

GTIN/EAN: 5906301814689

Diameter

48 mm [±1 mm]

internal diameter Ø

11/7 mm [±1 mm]

Height

11.5 mm [±1 mm]

Weight

114 g

Load capacity

63.00 kg / 617.82 N

Coating

[NiCuNi] Nickel

product parameters »

45.10 ZŁ with VAT / pcs + price for transport

36.67 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
36.67 ZŁ
45.10 ZŁ
price from 10 pcs
34.47 ZŁ
42.40 ZŁ
price from 30 pcs
32.27 ZŁ
39.69 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Not sure about your choice?

Call us now +48 888 99 98 98 alternatively send us a note using contact form the contact page.
Lifting power along with appearance of a neodymium magnet can be analyzed with our magnetic calculator.

Orders placed before 14:00 will be shipped the same business day.

Technical data of the product - UMC 48x11/7x11.5 / N38 - cylindrical magnetic holder

Specification / characteristics - UMC 48x11/7x11.5 / N38 - cylindrical magnetic holder

properties
properties values
Cat. no. 320412
GTIN/EAN 5906301814689
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 48 mm [±1 mm]
internal diameter Ø 11/7 mm [±1 mm]
Height 11.5 mm [±1 mm]
Weight 114 g
Load capacity ~ ? 63.00 kg / 617.82 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMC 48x11/7x11.5 / N38 - cylindrical 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 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%
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: 320412-2025
Quick Unit Converter
Pulling force
Magnetic Induction
Enter a number into any field, to see all other values will update in real-time.

Check out also proposals

MPL 10x10x10 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 10x10x10 / N38 - lamellar magnet

5.29 ZŁ brutto / pcs
MW 38x12 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 38x12 / N38 - cylindrical magnet

32.10 ZŁ brutto / pcs
UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread
Product available Ships today (order by 14:00)

UMGGW 34x8 [M4] GW / N38 - magnetic holder rubber internal thread

9.84 ZŁ brutto / pcs
MPL 30x20x4 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 30x20x4 / N38 - lamellar magnet

10.23 ZŁ brutto / pcs
These are magnets in the shape of a rod in a brass or steel sleeve, ideal for embedding in deep sockets. They are used in positioning elements, injection molds, dies, and automation.
Mounting is done by screwing with a bolt from the back of the device or machine. Thanks to the long body, the magnet is stable in the hole and does not tilt.
The construction causes the magnetic flux to short-circuit inside, making the sides practically non-magnetic. It enables precise point action without side interference.
The neodymium magnet is deeply embedded (glued) in a solid block of steel or brass, making it very resistant. Suitable for working in difficult workshop and industrial conditions.
We recommend making the mounting hole with slight clearance and using glue for certainty. If high precision is required, measure the specific batch with a caliper before machining sockets.

Strengths as well as weaknesses of rare earth magnets.

Pros

Besides their tremendous strength, neodymium magnets offer the following advantages:
  • They virtually do not lose strength, because even after ten years the performance loss is only ~1% (according to literature),
  • They are extremely resistant to demagnetization induced by external field influence,
  • A magnet with a smooth nickel surface has better aesthetics,
  • Magnetic induction on the top side of the magnet is exceptional,
  • Thanks to resistance to high temperature, they are able to function (depending on the shape) even at temperatures up to 230°C and higher...
  • Thanks to freedom in constructing and the ability to customize to client solutions,
  • Fundamental importance in future technologies – they find application in data components, electric motors, advanced medical instruments, as well as industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which makes them useful in miniature devices

Disadvantages

What to avoid - cons of neodymium magnets: application proposals
  • They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in a protective case. Such protection not only protects the magnet but also increases 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 stability even at temperatures up to 230°C
  • When exposed to humidity, magnets usually rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which secure oxidation and corrosion.
  • Due to limitations in producing nuts and complicated shapes in magnets, we recommend using cover - magnetic holder.
  • Possible danger to health – tiny shards of magnets pose a threat, if swallowed, which is particularly important in the context of child health protection. Furthermore, small elements of these magnets can be problematic in diagnostics medical in case of swallowing.
  • With large orders the cost of neodymium magnets is a challenge,

Lifting parameters

Maximum lifting capacity of the magnet – what affects it?

Breakaway force is the result of a measurement for ideal contact conditions, including:
  • using a sheet made of high-permeability steel, acting as a magnetic yoke
  • whose thickness is min. 10 mm
  • characterized by smoothness
  • without any insulating layer between the magnet and steel
  • during pulling in a direction perpendicular to the plane
  • at room temperature

Lifting capacity in real conditions – factors

Bear in mind that the magnet holding will differ depending on elements below, starting with the most relevant:
  • Space between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) significantly weakens the pulling force, often by half at just 0.5 mm.
  • Direction of force – maximum parameter is available only during pulling at a 90° angle. The shear force of the magnet along the plate is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Metal type – not every steel attracts identically. High carbon content worsen the interaction with the magnet.
  • Surface structure – the smoother and more polished the surface, the larger the contact zone and stronger the hold. Roughness creates an air distance.
  • Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, however under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a small distance between the magnet’s surface and the plate decreases the lifting capacity.

H&S for magnets
Finger safety

Danger of trauma: The attraction force is so great that it can result in hematomas, crushing, and even bone fractures. Use thick gloves.

Demagnetization risk

Watch the temperature. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.

Dust explosion hazard

Drilling and cutting of neodymium magnets carries a risk of fire risk. Neodymium dust oxidizes rapidly with oxygen and is difficult to extinguish.

Risk of cracking

Despite metallic appearance, the material is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Electronic devices

Equipment safety: Neodymium magnets can ruin data carriers and sensitive devices (heart implants, medical aids, mechanical watches).

Life threat

People with a ICD have to keep an large gap from magnets. The magnetism can interfere with the operation of the implant.

Threat to navigation

Remember: neodymium magnets generate a field that disrupts sensitive sensors. Maintain a safe distance from your phone, tablet, and GPS.

Immense force

Be careful. Rare earth magnets act from a long distance and snap with huge force, often quicker than you can react.

Sensitization to coating

It is widely known that nickel (standard magnet coating) is a common allergen. If you have an allergy, prevent direct skin contact and opt for versions in plastic housing.

Adults only

Strictly keep magnets out of reach of children. Ingestion danger is high, and the consequences of magnets clamping inside the body are life-threatening.

Attention! Details about risks in the article: Safety of working with magnets.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98