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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+48 22 499 98 98
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Force as well as shape of a magnet can be checked using our
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Physical properties - 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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Pros as well as cons of rare earth magnets.
Benefits
- They retain magnetic properties for around ten years – the loss is just ~1% (according to analyses),
- Magnets effectively protect themselves against loss of magnetization caused by ambient magnetic noise,
- The use of an metallic finish of noble metals (nickel, gold, silver) causes the element to present itself better,
- Magnetic induction on the top side of the magnet turns out to be maximum,
- Thanks to resistance to high temperature, they can operate (depending on the form) even at temperatures up to 230°C and higher...
- Thanks to flexibility in designing and the ability to customize to client solutions,
- Significant place in advanced technology sectors – they find application in hard drives, electric drive systems, diagnostic systems, also other advanced devices.
- Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,
Limitations
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only protects the magnet but also improves its resistance to damage
- 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.
- Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we advise using waterproof magnets made of rubber, plastic or other material resistant to moisture
- Due to limitations in producing threads and complex shapes in magnets, we propose using casing - magnetic holder.
- Potential hazard related to microscopic parts of magnets are risky, when accidentally swallowed, which becomes key in the aspect of protecting the youngest. Furthermore, small elements of these products are able to complicate diagnosis medical after entering the body.
- With mass production the cost of neodymium magnets is a challenge,
Lifting parameters
Highest magnetic holding force – what affects it?
- using a sheet made of mild steel, serving as a ideal flux conductor
- whose transverse dimension equals approx. 10 mm
- with an ground contact surface
- under conditions of gap-free contact (surface-to-surface)
- during pulling in a direction vertical to the plane
- in temp. approx. 20°C
Key elements affecting lifting force
- Clearance – existence of any layer (paint, tape, air) acts as an insulator, which reduces power steeply (even by 50% at 0.5 mm).
- Angle of force application – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is usually many times smaller (approx. 1/5 of the lifting capacity).
- Steel thickness – too thin steel does not accept the full field, causing part of the flux to be wasted into the air.
- Steel grade – the best choice is high-permeability steel. Hardened steels may have worse magnetic properties.
- Surface structure – the more even the surface, the better the adhesion and stronger the hold. Roughness acts like micro-gaps.
- Temperature – heating the magnet causes a temporary drop of force. Check the thermal limit for a given model.
Holding force was measured on a smooth steel plate of 20 mm thickness, when the force acted perpendicularly, in contrast under parallel forces the load capacity is reduced by as much as fivefold. In addition, even a slight gap between the magnet and the plate decreases the load capacity.
Safety rules for work with neodymium magnets
Phone sensors
A powerful magnetic field interferes with the operation of compasses in phones and navigation systems. Maintain magnets near a device to prevent breaking the sensors.
Magnets are brittle
NdFeB magnets are ceramic materials, which means they are very brittle. Collision of two magnets leads to them cracking into small pieces.
Conscious usage
Before starting, check safety instructions. Sudden snapping can break the magnet or hurt your hand. Be predictive.
Fire risk
Powder produced during cutting of magnets is flammable. Avoid drilling into magnets unless you are an expert.
Nickel allergy
Some people suffer from a contact allergy to nickel, which is the standard coating for neodymium magnets. Extended handling may cause a rash. We strongly advise use protective gloves.
This is not a toy
NdFeB magnets are not suitable for play. Accidental ingestion of multiple magnets may result in them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates immediate surgery.
ICD Warning
Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Do not approach if you have medical devices.
Operating temperature
Standard neodymium magnets (N-type) lose magnetization when the temperature goes above 80°C. Damage is permanent.
Serious injuries
Mind your fingers. Two large magnets will join immediately with a force of massive weight, destroying everything in their path. Be careful!
Data carriers
Intense magnetic fields can destroy records on credit cards, hard drives, and other magnetic media. Maintain a gap of at least 10 cm.
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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