UMC 42x7/4x9 / N38 - cylindrical magnetic holder
cylindrical magnetic holder
Catalog no 320411
GTIN/EAN: 5906301814672
Diameter
42 mm [±1 mm]
internal diameter Ø
7/4 mm [±1 mm]
Height
9 mm [±1 mm]
Weight
72 g
Magnetization Direction
↑ axial
Load capacity
32.00 kg / 313.81 N
Coating
[NiCuNi] Nickel
29.99 ZŁ with VAT / pcs + price for transport
24.38 ZŁ net + 23% VAT / pcs
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Technical data - UMC 42x7/4x9 / N38 - cylindrical magnetic holder
Specification / characteristics - UMC 42x7/4x9 / N38 - cylindrical magnetic holder
| properties | values |
|---|---|
| Cat. no. | 320411 |
| GTIN/EAN | 5906301814672 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter | 42 mm [±1 mm] |
| internal diameter Ø | 7/4 mm [±1 mm] |
| Height | 9 mm [±1 mm] |
| Weight | 72 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 32.00 kg / 313.81 N |
| 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 |
Elemental analysis
| 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 |
See more products
![HH 16x5.3 [M3] / N38 - through hole magnetic holder](https://cdn3.dhit.pl/graphics/products/hh-16x5.3-m3-sud.jpg "HH 16x5.3 [M3] / N38 - through hole magnetic holder")
Strengths as well as weaknesses of rare earth magnets.
Advantages
- They virtually do not lose power, because even after ten years the decline in efficiency is only ~1% (in laboratory conditions),
- Magnets perfectly protect themselves against loss of magnetization caused by ambient magnetic noise,
- Thanks to the shiny finish, the surface of nickel, gold, or silver gives an visually attractive appearance,
- The surface of neodymium magnets generates a maximum magnetic field – this is one of their assets,
- Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
- Possibility of accurate machining and adjusting to complex conditions,
- Fundamental importance in modern technologies – they are utilized in magnetic memories, electromotive mechanisms, diagnostic systems, and industrial machines.
- Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,
Limitations
- They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting 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 suffer a drop in power. Often, when the temperature exceeds 80°C, their power 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
- They rust in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Limited ability of producing threads in the magnet and complex forms - preferred is a housing - magnet mounting.
- Potential hazard to health – tiny shards of magnets are risky, when accidentally swallowed, which is particularly important in the context of child health protection. It is also worth noting that small elements of these devices can be problematic in diagnostics medical after entering the body.
- Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications
Holding force characteristics
Maximum lifting force for a neodymium magnet – what it depends on?
- using a plate made of mild steel, serving as a ideal flux conductor
- possessing a thickness of min. 10 mm to avoid saturation
- with a plane free of scratches
- with total lack of distance (without coatings)
- under vertical force vector (90-degree angle)
- at ambient temperature approx. 20 degrees Celsius
Determinants of practical lifting force of a magnet
- Gap between magnet and steel – every millimeter of distance (caused e.g. by veneer or dirt) diminishes the magnet efficiency, often by half at just 0.5 mm.
- Angle of force application – maximum parameter is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is typically many times lower (approx. 1/5 of the lifting capacity).
- Element thickness – for full efficiency, the steel must be adequately massive. Thin sheet limits the attraction force (the magnet "punches through" it).
- Material composition – different alloys attracts identically. Alloy additives worsen the attraction effect.
- Plate texture – smooth surfaces guarantee perfect abutment, which improves field saturation. Uneven metal reduce efficiency.
- Operating temperature – NdFeB sinters have a sensitivity to temperature. When it is hot they are weaker, and in frost they can be stronger (up to a certain limit).
Lifting capacity testing was carried out on a smooth plate of optimal thickness, under perpendicular forces, however under shearing force the load capacity is reduced by as much as 75%. In addition, even a minimal clearance between the magnet and the plate decreases the lifting capacity.
Safe handling of NdFeB magnets
Caution required
Handle with care. Neodymium magnets act from a long distance and connect with massive power, often faster than you can react.
Heat warning
Do not overheat. Neodymium magnets are sensitive to temperature. If you require operation above 80°C, inquire about special high-temperature series (H, SH, UH).
Metal Allergy
Some people suffer from a contact allergy to Ni, which is the common plating for NdFeB magnets. Prolonged contact may cause a rash. It is best to wear protective gloves.
Dust explosion hazard
Fire hazard: Neodymium dust is explosive. Avoid machining magnets in home conditions as this may cause fire.
Hand protection
Large magnets can smash fingers instantly. Under no circumstances put your hand betwixt two strong magnets.
Danger to the youngest
Only for adults. Tiny parts can be swallowed, leading to severe trauma. Store away from kids and pets.
Risk of cracking
Neodymium magnets are ceramic materials, meaning they are prone to chipping. Collision of two magnets will cause them breaking into small pieces.
Cards and drives
Device Safety: Strong magnets can ruin data carriers and sensitive devices (heart implants, medical aids, timepieces).
Danger to pacemakers
Life threat: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.
GPS Danger
Navigation devices and mobile phones are extremely susceptible to magnetism. Direct contact with a powerful NdFeB magnet can permanently damage the internal compass in your phone.
Tabela kosztu i czasu dostawy
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