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UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread
magnetic holder rubber internal thread
Catalog no 160305
GTIN/EAN: 5906301813637
Diameter Ø
29 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
18 g
Load capacity
6.40 kg / 62.76 N
8.61 ZŁ with VAT / pcs + price for transport
7.00 ZŁ net + 23% VAT / pcs
bulk discounts:
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Technical specification - UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread
Specification / characteristics - UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread
| properties | values |
|---|---|
| Cat. no. | 160305 |
| GTIN/EAN | 5906301813637 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 29 mm [±1 mm] |
| Height | 8 mm [±1 mm] |
| Weight | 18 g |
| Load capacity ~ ? | 6.40 kg / 62.76 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% |
Ecology and recycling (GPSR)
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
See also proposals
![SM 25x275 [2xM8] / N52 - magnetic separator](https://cdn3.dhit.pl/graphics/products/sm-25x275-2xm8-vih.jpg "SM 25x275 [2xM8] / N52 - magnetic separator")
Strengths and weaknesses of Nd2Fe14B magnets.
Strengths
- They do not lose magnetism, even over approximately 10 years – the decrease in power is only ~1% (according to tests),
- They possess excellent resistance to magnetic field loss due to external magnetic sources,
- The use of an metallic finish of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
- The surface of neodymium magnets generates a maximum magnetic field – this is a distinguishing feature,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling action at temperatures approaching 230°C and above...
- Possibility of precise forming and adapting to precise requirements,
- Wide application in advanced technology sectors – they are utilized in mass storage devices, drive modules, diagnostic systems, also technologically advanced constructions.
- Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,
Cons
- They are fragile upon too strong impacts. To avoid cracks, it is worth protecting magnets in special housings. Such protection not only shields the magnet but also improves its resistance to damage
- Neodymium magnets lose their power under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
- Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
- Due to limitations in realizing threads and complex shapes in magnets, we propose using cover - magnetic mount.
- Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the aspect of protecting the youngest. Furthermore, small elements of these products are able to be problematic in diagnostics medical after entering the body.
- With mass production the cost of neodymium magnets can be a barrier,
Holding force characteristics
Best holding force of the magnet in ideal parameters – what contributes to it?
- with the use of a sheet made of low-carbon steel, ensuring full magnetic saturation
- with a thickness minimum 10 mm
- with an polished contact surface
- with direct contact (no impurities)
- for force applied at a right angle (in the magnet axis)
- in stable room temperature
Key elements affecting lifting force
- Gap between surfaces – every millimeter of distance (caused e.g. by veneer or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
- Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds much less (often approx. 20-30% of maximum force).
- Steel thickness – too thin plate does not close the flux, causing part of the flux to be lost into the air.
- Steel grade – the best choice is pure iron steel. Hardened steels may attract less.
- Smoothness – ideal contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
- Temperature – temperature increase results in weakening of force. Check the thermal limit for a given model.
Holding force was tested on the plate surface of 20 mm thickness, when the force acted perpendicularly, whereas under parallel forces the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate reduces the load capacity.
Precautions when working with NdFeB magnets
Allergic reactions
Studies show that nickel (the usual finish) is a strong allergen. If your skin reacts to metals, prevent direct skin contact or select versions in plastic housing.
Shattering risk
NdFeB magnets are sintered ceramics, meaning they are fragile like glass. Impact of two magnets will cause them shattering into shards.
Keep away from computers
Very strong magnetic fields can erase data on payment cards, HDDs, and other magnetic media. Maintain a gap of min. 10 cm.
Caution required
Handle magnets with awareness. Their immense force can surprise even experienced users. Plan your moves and respect their power.
Heat sensitivity
Standard neodymium magnets (N-type) lose power when the temperature exceeds 80°C. Damage is permanent.
Crushing risk
Large magnets can crush fingers instantly. Under no circumstances place your hand between two strong magnets.
Adults only
Absolutely store magnets out of reach of children. Risk of swallowing is significant, and the effects of magnets clamping inside the body are life-threatening.
Medical interference
Warning for patients: Powerful magnets affect medical devices. Keep at least 30 cm distance or request help to work with the magnets.
Flammability
Powder generated during grinding of magnets is combustible. Do not drill into magnets without proper cooling and knowledge.
Magnetic interference
Navigation devices and smartphones are extremely sensitive to magnetic fields. Direct contact with a powerful NdFeB magnet can decalibrate the internal compass in your phone.
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
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12.30 ZŁ
Płatność przy odbiorze (pobranie):
GLS kurier
Przesyłka będzie u Ciebie za 1-2 dni
23.00 ZŁ
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