UMT 29x38 black / N38 - board holder
board holder
Catalog no 230284
GTIN/EAN: 5906301814368
Diameter Ø
29 mm [±1 mm]
Height
38 mm [±1 mm]
Weight
6 g
Coating
[NiCuNi] Nickel
6.81 ZŁ with VAT / pcs + price for transport
5.54 ZŁ net + 23% VAT / pcs
bulk discounts:
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Product card - UMT 29x38 black / N38 - board holder
Specification / characteristics - UMT 29x38 black / N38 - board holder
| properties | values |
|---|---|
| Cat. no. | 230284 |
| GTIN/EAN | 5906301814368 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 29 mm [±1 mm] |
| Height | 38 mm [±1 mm] |
| Weight | 6 g |
| Coating | [NiCuNi] Nickel |
| Manufacturing Tolerance | ±1 mm |
Magnetic properties of material N38
| 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
| 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 |
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 |
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Strengths and weaknesses of rare earth magnets.
Pros
- Their magnetic field is maintained, and after around ten years it decreases only by ~1% (according to research),
- Neodymium magnets are distinguished by extremely resistant to loss of magnetic properties caused by external field sources,
- Thanks to the shiny finish, the plating of Ni-Cu-Ni, gold, or silver-plated gives an visually attractive appearance,
- Magnetic induction on the top side of the magnet is exceptional,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for operation at temperatures reaching 230°C and above...
- Thanks to versatility in designing and the capacity to adapt to individual projects,
- Versatile presence in electronics industry – they are utilized in computer drives, brushless drives, precision medical tools, as well as modern systems.
- Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,
Disadvantages
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth securing magnets in special housings. Such protection not only protects the magnet but also increases its resistance to damage
- When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size, as well as 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 rust. Therefore during using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material protecting against moisture
- Limited ability of making nuts in the magnet and complex shapes - recommended is casing - mounting mechanism.
- Possible danger resulting from small fragments of magnets are risky, if swallowed, which is particularly important in the aspect of protecting the youngest. Furthermore, small elements of these devices can complicate diagnosis medical in case of swallowing.
- With large orders the cost of neodymium magnets is economically unviable,
Lifting parameters
Highest magnetic holding force – what it depends on?
- on a block made of structural steel, optimally conducting the magnetic field
- whose transverse dimension is min. 10 mm
- with a surface cleaned and smooth
- under conditions of gap-free contact (surface-to-surface)
- for force acting at a right angle (in the magnet axis)
- at temperature room level
Determinants of practical lifting force of a magnet
- Gap (betwixt the magnet and the plate), as even a tiny distance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to paint, corrosion or debris).
- Load vector – highest force is obtained only during pulling at a 90° angle. The shear force of the magnet along the surface is standardly many times lower (approx. 1/5 of the lifting capacity).
- Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
- Material composition – different alloys reacts the same. Alloy additives weaken the attraction effect.
- Smoothness – full contact is obtained only on smooth steel. Rough texture reduce the real contact area, reducing force.
- Temperature influence – hot environment reduces pulling force. Too high temperature can permanently damage the magnet.
Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, however under attempts to slide the magnet the holding force is lower. Additionally, even a slight gap between the magnet and the plate reduces the lifting capacity.
Safe handling of neodymium magnets
Permanent damage
Keep cool. NdFeB magnets are susceptible to temperature. If you need operation above 80°C, ask us about special high-temperature series (H, SH, UH).
Nickel coating and allergies
It is widely known that nickel (the usual finish) is a potent allergen. For allergy sufferers, prevent direct skin contact or select encased magnets.
Crushing force
Protect your hands. Two powerful magnets will snap together instantly with a force of massive weight, destroying everything in their path. Exercise extreme caution!
Precision electronics
A powerful magnetic field disrupts the functioning of magnetometers in phones and GPS navigation. Do not bring magnets near a smartphone to prevent breaking the sensors.
Keep away from computers
Powerful magnetic fields can corrupt files on credit cards, hard drives, and other magnetic media. Maintain a gap of min. 10 cm.
Material brittleness
Beware of splinters. Magnets can explode upon violent connection, launching sharp fragments into the air. Eye protection is mandatory.
Danger to pacemakers
For implant holders: Powerful magnets disrupt electronics. Maintain minimum 30 cm distance or request help to work with the magnets.
Adults only
Strictly store magnets away from children. Choking hazard is significant, and the consequences of magnets connecting inside the body are tragic.
Dust is flammable
Machining of neodymium magnets carries a risk of fire hazard. Neodymium dust reacts violently with oxygen and is difficult to extinguish.
Powerful field
Before use, read the rules. Sudden snapping can destroy the magnet or injure your hand. Be predictive.
Tabela kosztu i czasu dostawy
Płatność przed wysyłką:
GLS kurier
Przesyłka będzie u Ciebie za 2-3 dni
14.99 ZŁ
InPost Paczkomaty 24/7
Przesyłka będzie u Ciebie za 1-2 dni
12.30 ZŁ
Płatność przy odbiorze (pobranie):
GLS kurier
Przesyłka będzie u Ciebie za 1-2 dni
23.00 ZŁ
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