UMS 25x10.5x5.5x8 / N38 - conical magnetic holder
conical magnetic holder
Catalog no 220328
GTIN/EAN: 5906301814184
Diameter Ø
25 mm [±1 mm]
cone dimension Ø
10.5x5.5 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
21 g
Magnetization Direction
↑ axial
Load capacity
14.00 kg / 137.29 N
Coating
[NiCuNi] Nickel
9.72 ZŁ with VAT / pcs + price for transport
7.90 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us
+48 888 99 98 98
alternatively get in touch by means of
form
the contact section.
Weight and form of neodymium magnets can be calculated with our
magnetic calculator.
Same-day shipping for orders placed before 14:00.
Product card - UMS 25x10.5x5.5x8 / N38 - conical magnetic holder
Specification / characteristics - UMS 25x10.5x5.5x8 / N38 - conical magnetic holder
| properties | values |
|---|---|
| Cat. no. | 220328 |
| GTIN/EAN | 5906301814184 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 25 mm [±1 mm] |
| cone dimension Ø | 10.5x5.5 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 21 g |
| Magnetization Direction | ↑ axial |
| Load capacity ~ ? | 14.00 kg / 137.29 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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
![BM 850x180x70 [4x M8] - magnetic beam](https://cdn3.dhit.pl/graphics/products/bm-850x180x70-4x-m8-mep.jpg "BM 850x180x70 [4x M8] - magnetic beam")
![UMGGZ 34x6 [M4] GZ / N38 - rubber magnetic holder external thread](https://cdn3.dhit.pl/graphics/products/umg-34x6-m4-gz-rad.jpg "UMGGZ 34x6 [M4] GZ / N38 - rubber magnetic holder external thread")
Pros and cons of rare earth magnets.
Strengths
- They do not lose magnetism, even during nearly 10 years – the reduction in lifting capacity is only ~1% (theoretically),
- Magnets perfectly defend themselves against demagnetization caused by ambient magnetic noise,
- By covering with a reflective coating of silver, the element acquires an modern look,
- The surface of neodymium magnets generates a unique magnetic field – this is one of their assets,
- Through (appropriate) combination of ingredients, they can achieve high thermal strength, enabling functioning at temperatures reaching 230°C and above...
- Possibility of custom machining as well as adapting to atypical conditions,
- Wide application in high-tech industry – they find application in hard drives, electric motors, precision medical tools, also multitasking production systems.
- Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,
Cons
- Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only secures them against impacts but also raises their durability
- NdFeB magnets lose strength when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (a factor is the shape and dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
- Magnets exposed to a humid environment can corrode. Therefore during using outdoors, we suggest using water-impermeable magnets made of rubber, plastic or other material resistant to moisture
- Limited ability of making nuts in the magnet and complex forms - recommended is cover - magnet mounting.
- Health risk to health – tiny shards of magnets are risky, in case of ingestion, which gains importance in the context of child health protection. Furthermore, small components of these devices can be problematic in diagnostics medical in case of swallowing.
- Due to complex production process, their price is higher than average,
Pull force analysis
Maximum holding power of the magnet – what contributes to it?
- with the contact of a yoke made of special test steel, ensuring full magnetic saturation
- whose thickness is min. 10 mm
- with a plane perfectly flat
- with total lack of distance (no coatings)
- under axial force direction (90-degree angle)
- at standard ambient temperature
Magnet lifting force in use – key factors
- Air gap (betwixt the magnet and the metal), as even a tiny clearance (e.g. 0.5 mm) leads to a reduction in lifting capacity by up to 50% (this also applies to varnish, corrosion or dirt).
- Direction of force – highest force is obtained only during perpendicular pulling. The shear force of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
- Base massiveness – insufficiently thick plate does not accept the full field, causing part of the flux to be lost to the other side.
- Steel type – mild steel attracts best. Alloy steels reduce magnetic permeability and holding force.
- Surface finish – ideal contact is possible only on polished steel. Rough texture create air cushions, reducing force.
- Temperature influence – hot environment reduces pulling force. Exceeding the limit temperature can permanently damage the magnet.
Lifting capacity was measured by applying a steel plate with a smooth surface of optimal thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the load capacity is reduced by as much as 75%. Additionally, even a slight gap between the magnet’s surface and the plate lowers the load capacity.
H&S for magnets
Bodily injuries
Protect your hands. Two powerful magnets will join instantly with a force of massive weight, crushing everything in their path. Exercise extreme caution!
Product not for children
Product intended for adults. Small elements pose a choking risk, causing intestinal necrosis. Store out of reach of children and animals.
Pacemakers
Warning for patients: Strong magnetic fields disrupt electronics. Keep minimum 30 cm distance or request help to handle the magnets.
Sensitization to coating
Some people experience a contact allergy to nickel, which is the common plating for neodymium magnets. Frequent touching can result in skin redness. It is best to wear safety gloves.
Phone sensors
Navigation devices and smartphones are highly susceptible to magnetic fields. Close proximity with a powerful NdFeB magnet can decalibrate the internal compass in your phone.
Do not underestimate power
Be careful. Rare earth magnets attract from a long distance and connect with huge force, often quicker than you can react.
Risk of cracking
NdFeB magnets are sintered ceramics, which means they are very brittle. Impact of two magnets will cause them cracking into small pieces.
Safe distance
Data protection: Neodymium magnets can ruin payment cards and sensitive devices (heart implants, medical aids, mechanical watches).
Mechanical processing
Fire hazard: Rare earth powder is highly flammable. Avoid machining magnets without safety gear as this may cause fire.
Permanent damage
Avoid heat. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, look for HT versions (H, SH, UH).
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
Rate the product
Your rating