← previous
next →
Product available Ships tomorrow

UMC 20x6/3x7 / N38 - cylindrical magnetic holder

cylindrical magnetic holder

Catalog no 320407

GTIN/EAN: 5906301814634

5.00
Load capacity 6.00 kg / 58.84 N
Diameter
20 mm [±1 mm]
internal diameter Ø
6/3 mm [±1 mm]
Height
7 mm [±1 mm]
Weight
12 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
technical parameters »

6.99 zł with VAT / pcs + price for transport

5.68 zł net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
5.68 ZŁ
6.99 ZŁ
price from 100 pcs
5.34 ZŁ
6.57 ZŁ
price from 150 pcs
5.00 ZŁ
6.15 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Hunting for a discount?

Contact us by phone +48 888 99 98 98 or let us know via form the contact page.
Specifications along with shape of a magnet can be reviewed on our online calculation tool.

Same-day processing for orders placed before 14:00.

Technical parameters of the product - UMC 20x6/3x7 / N38 - cylindrical magnetic holder

Specification / characteristics - UMC 20x6/3x7 / N38 - cylindrical magnetic holder

properties
properties values
Cat. no. 320407
GTIN/EAN 5906301814634
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 20 mm [±1 mm]
internal diameter Ø 6/3 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 UMC 20x6/3x7 / 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

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%

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: 320407-2026
Quick Unit Converter

Force (pull)

Field Strength

Simply populate a single box, to let the tool calculate the rest for you.

View more proposals

SM 25x125 [2xM8] / N42 - magnetic separator
Product available Ships tomorrow

SM 25x125 [2xM8] / N42 - magnetic separator

393.60 zł brutto / pcs
UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder
Product available Ships tomorrow

UMP 75x25 [M10x3] GW F200 GOLD Lina / N42 - search holder

200.00 zł brutto / pcs
MPL 5x5x2 / N38 - lamellar magnet
Product available Ships tomorrow

MPL 5x5x2 / N38 - lamellar magnet

0.308 zł brutto / pcs
MPL 12x10x4 / N38 - lamellar magnet
Product available Ships tomorrow

MPL 12x10x4 / N38 - lamellar magnet

1.697 zł brutto / pcs
Cylindrical holders (Type B) distinguish themselves with a large body height, which allows for deep mounting. Used where the magnet must be hidden deep in the material or precisely positioned.
These holders usually have an internal thread (blind or through) on the back wall. The mounting thread allows for stable and secure fixing in a machine or jig.
The construction causes the magnetic flux to short-circuit inside, making the sides practically non-magnetic. This is a key feature when mounting in steel sockets so the magnet doesn't "stick" to the hole walls during insertion.
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. It is an industrial product, not a precise machine element, although the execution is careful.

Pros as well as cons of Nd2Fe14B magnets.

Strengths

Apart from their superior power, neodymium magnets have these key benefits:
  • They do not lose strength, even over nearly 10 years – the decrease in strength is only ~1% (based on measurements),
  • They show high resistance to demagnetization induced by external disturbances,
  • In other words, due to the metallic layer of gold, the element gains a professional look,
  • Magnetic induction on the surface of the magnet turns out to be exceptional,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Due to the possibility of flexible molding and customization to unique projects, NdFeB magnets can be created in a broad palette of forms and dimensions, which amplifies use scope,
  • Key role in advanced technology sectors – they are utilized in data components, drive modules, medical devices, as well as other advanced devices.
  • Thanks to their power density, small magnets offer high operating force, in miniature format,

Limitations

Disadvantages of neodymium magnets:
  • To avoid cracks upon strong impacts, we recommend using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • NdFeB magnets lose power when exposed to high temperatures. After reaching 80°C, many of them experience permanent drop of power (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are very resistant to heat
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material resistant to moisture
  • We suggest casing - magnetic mechanism, due to difficulties in creating threads inside the magnet and complex shapes.
  • Potential hazard resulting from small fragments of magnets can be dangerous, in case of ingestion, which gains importance in the context of child health protection. Furthermore, small elements of these magnets can complicate diagnosis medical in case of swallowing.
  • High unit price – neodymium magnets cost more than other types of magnets (e.g. ferrite), which can limit application in large quantities

Holding force characteristics

Breakaway strength of the magnet in ideal conditions – what affects it?

Breakaway force is the result of a measurement for ideal contact conditions, taking into account:
  • on a block made of mild steel, perfectly concentrating the magnetic field
  • with a cross-section minimum 10 mm
  • with an ideally smooth contact surface
  • with zero gap (without paint)
  • during detachment in a direction perpendicular to the mounting surface
  • at temperature approx. 20 degrees Celsius

What influences lifting capacity in practice

In practice, the actual lifting capacity depends on a number of factors, listed from the most important:
  • Distance – existence of foreign body (rust, dirt, air) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Element thickness – to utilize 100% power, the steel must be sufficiently thick. Thin sheet limits the lifting capacity (the magnet "punches through" it).
  • Chemical composition of the base – low-carbon steel attracts best. Alloy steels reduce magnetic permeability and lifting capacity.
  • Surface finish – full contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Thermal factor – hot environment weakens magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

Holding force was checked on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under attempts to slide the magnet the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate lowers the lifting capacity.

Precautions when working with neodymium magnets
Handling guide

Before use, read the rules. Uncontrolled attraction can break the magnet or hurt your hand. Think ahead.

Allergy Warning

Certain individuals experience a contact allergy to nickel, which is the typical protective layer for neodymium magnets. Frequent touching might lead to a rash. We recommend use protective gloves.

Heat warning

Regular neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. This process is irreversible.

Adults only

Absolutely store magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are tragic.

Phone sensors

Note: neodymium magnets generate a field that confuses sensitive sensors. Maintain a separation from your mobile, tablet, and GPS.

Material brittleness

Watch out for shards. Magnets can explode upon uncontrolled impact, ejecting sharp fragments into the air. Eye protection is mandatory.

Finger safety

Large magnets can break fingers in a fraction of a second. Under no circumstances put your hand between two strong magnets.

Safe distance

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

Machining danger

Mechanical processing of NdFeB material carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.

Medical implants

People with a ICD have to maintain an safe separation from magnets. The magnetism can disrupt the functioning of the implant.

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