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UMC 32x11/3x8 / N38 - cylindrical magnetic holder

cylindrical magnetic holder

Catalog no 320409

GTIN/EAN: 5906301814658

5.00

Diameter

32 mm [±1 mm]

internal diameter Ø

11/3 mm [±1 mm]

Height

8 mm [±1 mm]

Weight

36 g

Magnetization Direction

↑ axial

Load capacity

23.00 kg / 225.55 N

Coating

[NiCuNi] Nickel

technical parameters »

17.98 ZŁ with VAT / pcs + price for transport

14.62 ZŁ net + 23% VAT / pcs

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Lifting power along with form of magnets can be reviewed on our magnetic mass calculator.

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Technical specification - UMC 32x11/3x8 / N38 - cylindrical magnetic holder

Specification / characteristics - UMC 32x11/3x8 / N38 - cylindrical magnetic holder

properties
properties values
Cat. no. 320409
GTIN/EAN 5906301814658
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 32 mm [±1 mm]
internal diameter Ø 11/3 mm [±1 mm]
Height 8 mm [±1 mm]
Weight 36 g
Magnetization Direction ↑ axial
Load capacity ~ ? 23.00 kg / 225.55 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMC 32x11/3x8 / 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
Material specification
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: 320409-2026
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Cylindrical holders (Type B) distinguish themselves with a large body height, which allows for deep mounting. 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.
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 steel housing provides excellent mechanical protection for the brittle magnet against impacts. Suitable for working in difficult workshop and industrial conditions.
These holders are produced with standard tolerance for industrial magnets (usually ±0.1 mm or h6). It is an industrial product, not a precise machine element, although the execution is careful.

Pros as well as cons of rare earth magnets.

Strengths

Besides their tremendous magnetic power, neodymium magnets offer the following advantages:
  • They have stable power, and over around ten years their performance decreases symbolically – ~1% (according to theory),
  • They show high resistance to demagnetization induced by external magnetic fields,
  • A magnet with a smooth gold surface looks better,
  • They feature high magnetic induction at the operating surface, making them more effective,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and are able to act (depending on the form) even at a temperature of 230°C or more...
  • Thanks to freedom in shaping and the ability to adapt to specific needs,
  • Universal use in modern technologies – they find application in computer drives, brushless drives, precision medical tools, also technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in miniature devices

Disadvantages

Disadvantages of neodymium magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets experience a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and shape of the magnet). For those who need magnets for extreme conditions, we offer [AH] versions withstanding up to 230°C
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
  • We suggest cover - magnetic mechanism, due to difficulties in realizing threads inside the magnet and complicated forms.
  • Health risk resulting from small fragments of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child health protection. It is also worth noting that tiny parts of these products are able to be problematic in diagnostics medical when they are in the body.
  • With mass production the cost of neodymium magnets is economically unviable,

Pull force analysis

Maximum lifting force for a neodymium magnet – what it depends on?

Magnet power is the result of a measurement for optimal configuration, taking into account:
  • with the use of a yoke made of special test steel, ensuring maximum field concentration
  • possessing a massiveness of min. 10 mm to avoid saturation
  • characterized by smoothness
  • with direct contact (no impurities)
  • for force applied at a right angle (in the magnet axis)
  • at ambient temperature room level

Practical aspects of lifting capacity – factors

In practice, the real power depends on a number of factors, presented from most significant:
  • Gap between magnet and steel – even a fraction of a millimeter of distance (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet exhibits much less (typically approx. 20-30% of nominal force).
  • Wall thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of generating force.
  • Material composition – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
  • Base smoothness – the more even the plate, the better the adhesion and higher the lifting capacity. Unevenness acts like micro-gaps.
  • Temperature influence – high temperature reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Lifting capacity was assessed with the use of a polished steel plate of suitable thickness (min. 20 mm), under perpendicular pulling force, whereas under shearing force the lifting capacity is smaller. Moreover, even a small distance between the magnet’s surface and the plate reduces the load capacity.

Warnings
Nickel allergy

Some people suffer from a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Frequent touching may cause skin redness. We recommend use safety gloves.

Power loss in heat

Do not overheat. NdFeB magnets are susceptible to temperature. If you require resistance above 80°C, ask us about HT versions (H, SH, UH).

Keep away from computers

Intense magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.

This is not a toy

Only for adults. Tiny parts pose a choking risk, leading to serious injuries. Store out of reach of kids and pets.

Caution required

Exercise caution. Rare earth magnets attract from a distance and connect with massive power, often faster than you can move away.

Dust is flammable

Fire hazard: Neodymium dust is explosive. Do not process magnets in home conditions as this risks ignition.

GPS Danger

Remember: rare earth magnets produce a field that interferes with precision electronics. Keep a separation from your mobile, tablet, and GPS.

Crushing force

Big blocks can break fingers in a fraction of a second. Do not put your hand betwixt two attracting surfaces.

Beware of splinters

Despite metallic appearance, neodymium is delicate and cannot withstand shocks. Do not hit, as the magnet may shatter into sharp, dangerous pieces.

Medical interference

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

Safety First! Details about hazards in the article: Magnet Safety Guide.