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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

Magnetization Direction

↑ axial

Load capacity

63.00 kg / 617.82 N

Coating

[NiCuNi] Nickel

technical parameters »

45.10 ZŁ with VAT / pcs + price for transport

36.67 ZŁ net + 23% VAT / pcs

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Carbon Footprint – environmental impact GPSR Regulation – product safety
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Technical - 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
Magnetization Direction ↑ axial
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
Engineering data and GPSR
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%
Sustainability
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: 320412-2026
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They are characterized by point action of the magnetic field exclusively on the front surface. They are used in positioning elements, injection molds, dies, and automation.
These holders usually have an internal thread (blind or through) on the back wall. Thanks to the long body, the magnet is stable in the hole and does not tilt.
All magnet energy is directed exclusively to the front (active surface), increasing point force. This is a key feature when mounting in steel sockets so the magnet doesn't "stick" to the hole walls during insertion.
The steel housing provides excellent mechanical protection for the brittle magnet against impacts. The risk of magnet cracking with normal use is minimal as it is shielded.
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.

Advantages and disadvantages of rare earth magnets.

Benefits

Besides their immense field intensity, neodymium magnets offer the following advantages:
  • They have constant strength, and over more than ten years their attraction force decreases symbolically – ~1% (according to theory),
  • They maintain their magnetic properties even under external field action,
  • By covering with a reflective layer of gold, the element acquires an proper look,
  • Magnetic induction on the surface of the magnet turns out to be exceptional,
  • Due to their durability and thermal resistance, neodymium magnets can operate (depending on the form) even at high temperatures reaching 230°C or more...
  • Thanks to freedom in forming and the capacity to modify to unusual requirements,
  • Universal use in modern industrial fields – they find application in computer drives, brushless drives, medical devices, also other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Cons

Disadvantages of NdFeB magnets:
  • At strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Magnets exposed to a humid environment can corrode. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in realizing threads and complex forms in magnets, we propose using a housing - magnetic mount.
  • Potential hazard 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 tiny parts of these devices can disrupt the diagnostic process medical after entering the body.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities

Lifting parameters

Maximum lifting capacity of the magnet – what affects it?

The force parameter is a measurement result performed under specific, ideal conditions:
  • using a plate made of high-permeability steel, functioning as a magnetic yoke
  • whose thickness is min. 10 mm
  • with a plane cleaned and smooth
  • with direct contact (without impurities)
  • during detachment in a direction vertical to the mounting surface
  • at ambient temperature approx. 20 degrees Celsius

Practical aspects of lifting capacity – factors

Real force impacted by working environment parameters, mainly (from priority):
  • Clearance – existence of any layer (paint, dirt, gap) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
  • Force direction – remember that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
  • Steel thickness – too thin plate does not accept the full field, causing part of the power to be wasted into the air.
  • Plate material – low-carbon steel attracts best. Alloy admixtures lower magnetic properties and holding force.
  • Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Uneven metal weaken the grip.
  • Thermal environment – heating the magnet results in weakening of induction. Check the thermal limit for a given model.

Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, whereas under parallel forces the lifting capacity is smaller. Additionally, even a small distance between the magnet and the plate reduces the holding force.

Safe handling of neodymium magnets
Cards and drives

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

Conscious usage

Before starting, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Think ahead.

Keep away from electronics

Be aware: neodymium magnets generate a field that interferes with sensitive sensors. Maintain a safe distance from your mobile, device, and navigation systems.

Fire warning

Powder created during machining of magnets is self-igniting. Avoid drilling into magnets unless you are an expert.

Fragile material

Despite the nickel coating, neodymium is delicate and not impact-resistant. Do not hit, as the magnet may crumble into hazardous fragments.

Physical harm

Large magnets can smash fingers instantly. Under no circumstances place your hand betwixt two attracting surfaces.

Skin irritation risks

Some people suffer from a sensitization to nickel, which is the standard coating for NdFeB magnets. Frequent touching may cause a rash. We suggest use safety gloves.

Danger to pacemakers

Warning for patients: Strong magnetic fields affect electronics. Maintain at least 30 cm distance or ask another person to handle the magnets.

Permanent damage

Regular neodymium magnets (N-type) lose power when the temperature exceeds 80°C. This process is irreversible.

Adults only

NdFeB magnets are not intended for children. Eating a few magnets can lead to them pinching intestinal walls, which constitutes a severe health hazard and necessitates urgent medical intervention.

Security! More info about hazards in the article: Magnet Safety Guide.