UMT 29x38 white / N38 - board holder
board holder
Catalog no 230283
GTIN/EAN: 5906301814351
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 white / N38 - board holder
Specification / characteristics - UMT 29x38 white / N38 - board holder
| properties | values |
|---|---|
| Cat. no. | 230283 |
| GTIN/EAN | 5906301814351 |
| 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% |
Sustainability
| 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 neodymium magnets.
Advantages
- They do not lose strength, even after nearly ten years – the drop in power is only ~1% (theoretically),
- Magnets very well defend themselves against loss of magnetization caused by ambient magnetic noise,
- Thanks to the elegant finish, the plating of nickel, gold-plated, or silver-plated gives an modern appearance,
- Neodymium magnets generate maximum magnetic induction on a small area, which increases force concentration,
- Due to their durability and thermal resistance, neodymium magnets can operate (depending on the shape) even at high temperatures reaching 230°C or more...
- Due to the possibility of flexible molding and adaptation to specialized projects, neodymium magnets can be created in a variety of forms and dimensions, which increases their versatility,
- Wide application in future technologies – they are used in magnetic memories, brushless drives, precision medical tools, also other advanced devices.
- Thanks to concentrated force, small magnets offer high operating force, with minimal size,
Cons
- At strong impacts they can crack, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage and increases the magnet's durability.
- We warn that neodymium magnets can lose their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 230°C.
- They oxidize in a humid environment - during use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- We recommend casing - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex shapes.
- Health risk to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the aspect of protecting the youngest. Furthermore, small components of these magnets are able to complicate diagnosis medical when they are in the body.
- With large orders the cost of neodymium magnets can be a barrier,
Lifting parameters
Detachment force of the magnet in optimal conditions – what contributes to it?
- with the contact of a sheet made of low-carbon steel, guaranteeing maximum field concentration
- whose thickness reaches at least 10 mm
- characterized by lack of roughness
- without the slightest air gap between the magnet and steel
- during pulling in a direction perpendicular to the plane
- at conditions approx. 20°C
Determinants of practical lifting force of a magnet
- Gap (between the magnet and the plate), because even a tiny distance (e.g. 0.5 mm) results in a drastic drop in lifting capacity by up to 50% (this also applies to paint, corrosion or dirt).
- Force direction – declared lifting capacity refers to detachment vertically. When applying parallel force, the magnet holds significantly lower power (often approx. 20-30% of maximum force).
- Base massiveness – too thin steel does not accept the full field, causing part of the power to be escaped to the other side.
- Steel type – low-carbon steel attracts best. Higher carbon content lower magnetic properties and lifting capacity.
- Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
- Temperature – heating the magnet results in weakening of force. It is worth remembering the thermal limit for a given model.
Lifting capacity testing was carried out on a smooth plate of optimal thickness, under a perpendicular pulling force, whereas under shearing force the holding force is lower. Moreover, even a small distance between the magnet and the plate lowers the load capacity.
Safety rules for work with neodymium magnets
Keep away from computers
Powerful magnetic fields can corrupt files on payment cards, HDDs, and storage devices. Keep a distance of min. 10 cm.
Keep away from children
Neodymium magnets are not intended for children. Accidental ingestion of a few magnets can lead to them connecting inside the digestive tract, which constitutes a direct threat to life and necessitates immediate surgery.
Fire risk
Dust produced during cutting of magnets is flammable. Do not drill into magnets unless you are an expert.
Power loss in heat
Standard neodymium magnets (grade N) lose magnetization when the temperature surpasses 80°C. The loss of strength is permanent.
Physical harm
Large magnets can crush fingers in a fraction of a second. Never place your hand between two strong magnets.
Metal Allergy
A percentage of the population have a hypersensitivity to Ni, which is the common plating for NdFeB magnets. Frequent touching can result in a rash. We suggest wear protective gloves.
Keep away from electronics
Be aware: rare earth magnets generate a field that confuses sensitive sensors. Keep a separation from your phone, device, and GPS.
Risk of cracking
Beware of splinters. Magnets can explode upon violent connection, ejecting sharp fragments into the air. We recommend safety glasses.
Health Danger
Patients with a pacemaker should keep an safe separation from magnets. The magnetism can disrupt the operation of the life-saving device.
Caution required
Handle magnets with awareness. Their huge power can surprise even professionals. Plan your moves and respect their force.
Tabela kosztu i czasu dostawy
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