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NCM 20x13.5x5 / N38 - channel magnetic holder

channel magnetic holder

Catalog no 360487

GTIN/EAN: 5906301814863

5.00
Load capacity 8.00 kg / 78.45 N
Diameter Ø
20 mm [±1 mm]
Height
13.5 mm [±1 mm]
Weight
9.2 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel
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Product card - NCM 20x13.5x5 / N38 - channel magnetic holder

Specification / characteristics - NCM 20x13.5x5 / N38 - channel magnetic holder

properties
properties values
Cat. no. 360487
GTIN/EAN 5906301814863
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 20 mm [±1 mm]
Height 13.5 mm [±1 mm]
Weight 9.2 g
Magnetization Direction ↑ axial
Load capacity ~ ? 8.00 kg / 78.45 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics NCM 20x13.5x5 / N38 - channel 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

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%

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: 360487-2026
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Their unique "sandwich" construction (steel-magnet-steel) short-circuits the magnetic field, giving huge force on a small surface. They are very flat and durable, making them ideal for mounting in tight spaces (e.g., in window profiles).
Mounting is done using countersunk head screws, which hide flat in the housing. Hole spacing allows secure fixing even in difficult conditions.
Model NCM 20x13.5x5 / N38 reaches a capacity of up to 8.00 kg, which is an impressive result for such a flat element. This force is available with direct contact with metal over the entire surface.
Magnets are shielded on three sides by steel, increasing their lifespan and crack resistance. They are ideal for heavy doors, machine flaps, molds, and fastening systems in industry.
The steel housing is usually galvanized, providing basic protection against corrosion. To increase resistance to external conditions, they can be varnished or painted.

Strengths and weaknesses of Nd2Fe14B magnets.

Benefits

Besides their stability, neodymium magnets are valued for these benefits:
  • They virtually do not lose strength, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • They retain their magnetic properties even under external field action,
  • A magnet with a shiny gold surface has an effective appearance,
  • Magnetic induction on the working layer of the magnet turns out to be extremely intense,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures reaching 230°C and above...
  • Possibility of exact shaping and adjusting to precise requirements,
  • Key role in modern industrial fields – they are utilized in mass storage devices, electromotive mechanisms, medical equipment, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer high power in small dimensions, which allows their use in miniature devices

Limitations

Disadvantages of NdFeB magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon strong impact they can break. We advise keeping them in a steel housing, which not only protects them against impacts but also increases their durability
  • We warn that neodymium magnets can lose their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
  • When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation and corrosion.
  • Limited ability of making threads in the magnet and complicated shapes - preferred is cover - mounting mechanism.
  • Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which is particularly important in the context of child health protection. Additionally, tiny parts of these products can complicate diagnosis medical in case of swallowing.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Lifting parameters

Best holding force of the magnet in ideal parameters – what affects it?

The lifting capacity listed is a measurement result executed under specific, ideal conditions:
  • on a block made of structural steel, optimally conducting the magnetic flux
  • whose thickness equals approx. 10 mm
  • characterized by lack of roughness
  • with total lack of distance (without impurities)
  • during pulling in a direction vertical to the plane
  • at temperature approx. 20 degrees Celsius

What influences lifting capacity in practice

Please note that the working load may be lower subject to elements below, in order of importance:
  • Clearance – the presence of foreign body (rust, tape, gap) acts as an insulator, which lowers capacity rapidly (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of nominal force).
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Steel type – mild steel attracts best. Alloy steels lower magnetic permeability and holding force.
  • Base smoothness – the more even the surface, the better the adhesion and higher the lifting capacity. Unevenness creates an air distance.
  • Thermal factor – hot environment weakens magnetic field. Too high temperature can permanently damage the magnet.

Lifting capacity was determined using a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under shearing force the lifting capacity is smaller. Additionally, even a minimal clearance between the magnet and the plate reduces the lifting capacity.

Warnings
Handling guide

Before starting, check safety instructions. Sudden snapping can destroy the magnet or hurt your hand. Be predictive.

Phone sensors

GPS units and smartphones are extremely susceptible to magnetic fields. Close proximity with a strong magnet can decalibrate the sensors in your phone.

Flammability

Powder created during machining of magnets is self-igniting. Avoid drilling into magnets without proper cooling and knowledge.

Cards and drives

Intense magnetic fields can destroy records on payment cards, hard drives, and storage devices. Stay away of at least 10 cm.

Beware of splinters

Watch out for shards. Magnets can explode upon violent connection, launching shards into the air. We recommend safety glasses.

Do not overheat magnets

Monitor thermal conditions. Heating the magnet above 80 degrees Celsius will ruin its properties and strength.

Implant safety

Medical warning: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.

Serious injuries

Danger of trauma: The attraction force is so immense that it can cause blood blisters, crushing, and even bone fractures. Use thick gloves.

Sensitization to coating

Some people suffer from a contact allergy to Ni, which is the common plating for NdFeB magnets. Prolonged contact may cause dermatitis. We suggest use safety gloves.

Danger to the youngest

Neodymium magnets are not suitable for play. Eating a few magnets may result in them attracting across intestines, which poses a critical condition and necessitates urgent medical intervention.

Security! Want to know more? Check our post: Are neodymium magnets dangerous?