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UMGW 25x17x8 [M5] GW / N38 - magnetic holder internal thread
magnetic holder internal thread
Catalog no 180317
GTIN/EAN: 5906301813736
Diameter Ø
25 mm [±1 mm]
Height
17 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
25.4 g
Load capacity
17.00 kg / 166.71 N
11.91 ZŁ with VAT / pcs + price for transport
9.68 ZŁ net + 23% VAT / pcs
bulk discounts:
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Parameters and structure of a neodymium magnet can be estimated with our
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Technical - UMGW 25x17x8 [M5] GW / N38 - magnetic holder internal thread
Specification / characteristics - UMGW 25x17x8 [M5] GW / N38 - magnetic holder internal thread
| properties | values |
|---|---|
| Cat. no. | 180317 |
| GTIN/EAN | 5906301813736 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 25 mm [±1 mm] |
| Height | 17 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 25.4 g |
| Load capacity ~ ? | 17.00 kg / 166.71 N |
| 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 |
Chemical composition
| 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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
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Strengths as well as weaknesses of neodymium magnets.
Strengths
- They virtually do not lose strength, because even after ten years the performance loss is only ~1% (according to literature),
- Neodymium magnets are extremely resistant to demagnetization caused by external interference,
- A magnet with a smooth silver surface has better aesthetics,
- Magnets have impressive magnetic induction on the active area,
- Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the form) even at high temperatures reaching 230°C or more...
- Thanks to versatility in forming and the capacity to modify to unusual requirements,
- Versatile presence in modern industrial fields – they find application in magnetic memories, electric motors, medical devices, as well as industrial machines.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Disadvantages
- They are prone to damage upon too strong impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
- We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we recommend our specialized [AH] magnets, which work effectively even at 230°C.
- They oxidize in a humid environment. For use outdoors we recommend using waterproof magnets e.g. in rubber, plastic
- Limited ability of creating threads in the magnet and complicated shapes - preferred is a housing - magnetic holder.
- Health risk resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the context of child health protection. Additionally, small components of these products are able to be problematic in diagnostics medical after entering the body.
- With large orders the cost of neodymium magnets is a challenge,
Holding force characteristics
Detachment force of the magnet in optimal conditions – what affects it?
- on a plate made of mild steel, optimally conducting the magnetic field
- whose transverse dimension equals approx. 10 mm
- with a plane free of scratches
- under conditions of gap-free contact (surface-to-surface)
- for force acting at a right angle (pull-off, not shear)
- at temperature room level
Determinants of practical lifting force of a magnet
- Distance – existence of foreign body (rust, dirt, air) acts as an insulator, which lowers power rapidly (even by 50% at 0.5 mm).
- Loading method – catalog parameter refers to detachment vertically. When slipping, the magnet exhibits much less (often approx. 20-30% of maximum force).
- Base massiveness – too thin sheet does not close the flux, causing part of the power to be lost into the air.
- Steel grade – the best choice is pure iron steel. Cast iron may attract less.
- Surface condition – ground elements guarantee perfect abutment, which increases force. Rough surfaces reduce efficiency.
- Heat – neodymium magnets have a sensitivity to temperature. When it is hot they lose power, and at low temperatures they can be stronger (up to a certain limit).
Lifting capacity was determined with the use of a steel plate with a smooth surface of optimal thickness (min. 20 mm), under vertically applied force, in contrast under parallel forces the load capacity is reduced by as much as 5 times. In addition, even a slight gap between the magnet and the plate reduces the lifting capacity.
Warnings
Maximum temperature
Avoid heat. Neodymium magnets are sensitive to heat. If you need resistance above 80°C, inquire about special high-temperature series (H, SH, UH).
Danger to pacemakers
For implant holders: Strong magnetic fields affect electronics. Maintain minimum 30 cm distance or ask another person to work with the magnets.
Skin irritation risks
Nickel alert: The Ni-Cu-Ni coating contains nickel. If redness appears, immediately stop handling magnets and use protective gear.
Magnetic interference
Remember: neodymium magnets produce a field that disrupts precision electronics. Maintain a safe distance from your mobile, device, and navigation systems.
Dust explosion hazard
Fire hazard: Rare earth powder is highly flammable. Do not process magnets in home conditions as this may cause fire.
Fragile material
Neodymium magnets are ceramic materials, which means they are very brittle. Collision of two magnets will cause them shattering into small pieces.
Threat to electronics
Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Maintain a gap of at least 10 cm.
Do not underestimate power
Be careful. Rare earth magnets act from a long distance and snap with massive power, often faster than you can move away.
Product not for children
Strictly keep magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are tragic.
Serious injuries
Large magnets can break fingers instantly. Never put your hand betwixt two attracting surfaces.
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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