![Rubberized magnet UMGGW 29x8 [M4] GW / N38](https://cdn3.dhit.pl/graphics/banners/magnet.webp "Rubberized magnet UMGGW 29x8 [M4] GW / N38")
![UMGGW 29x8 [M4] GW / N38 - magnetic holder rubber internal thread](https://cdn3.dhit.pl/graphics/products/umg-29x8-m4-gw-duf.jpg)
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:
Need more?
Contact us by phone
+48 888 99 98 98
or contact us through
our online form
the contact page.
Parameters as well as appearance of magnets can be tested on our
magnetic mass calculator.
Orders submitted before 14:00 will be dispatched today!
Technical specification of the product - 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 |
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% |
Sustainability
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Check out more deals
![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")
![SM 18x175 [2xM5] / N42 - magnetic separator](https://cdn3.dhit.pl/graphics/products/sm-18x175-2xm5-rov.jpg "SM 18x175 [2xM5] / N42 - magnetic separator")
Advantages as well as disadvantages of neodymium magnets.
Pros
- They do not lose power, even during nearly 10 years – the drop in lifting capacity is only ~1% (according to tests),
- Magnets effectively resist against loss of magnetization caused by external fields,
- In other words, due to the reflective surface of gold, the element is aesthetically pleasing,
- Magnets have extremely high magnetic induction on the outer side,
- 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 flexibility in shaping and the capacity to adapt to client solutions,
- Fundamental importance in modern technologies – they are utilized in data components, electromotive mechanisms, diagnostic systems, also complex engineering applications.
- Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which allows their use in small systems
Disadvantages
- At very strong impacts they can break, therefore we recommend placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
- We warn that neodymium magnets can lose their strength 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 rust. Therefore when using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
- Limited ability of producing threads in the magnet and complicated shapes - preferred is casing - magnet mounting.
- Potential hazard resulting from small fragments of magnets are risky, when accidentally swallowed, which becomes key in the context of child health protection. It is also worth noting that tiny parts of these products are able to complicate diagnosis medical in case of swallowing.
- Due to complex production process, their price is relatively high,
Lifting parameters
Maximum lifting force for a neodymium magnet – what affects it?
- using a base made of mild steel, functioning as a circuit closing element
- whose transverse dimension reaches at least 10 mm
- with an polished touching surface
- without the slightest insulating layer between the magnet and steel
- for force acting at a right angle (pull-off, not shear)
- in temp. approx. 20°C
Determinants of practical lifting force of a magnet
- Clearance – the presence of any layer (paint, dirt, gap) acts as an insulator, which reduces capacity rapidly (even by 50% at 0.5 mm).
- Force direction – note that the magnet has greatest strength perpendicularly. Under sliding down, the capacity drops significantly, often to levels of 20-30% of the maximum value.
- Metal thickness – the thinner the sheet, the weaker the hold. Magnetic flux passes through the material instead of converting into lifting capacity.
- Material composition – different alloys attracts identically. High carbon content weaken the interaction with the magnet.
- Surface condition – ground elements ensure maximum contact, which improves field saturation. Uneven metal weaken the grip.
- Temperature influence – hot environment weakens pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.
Lifting capacity was assessed by applying a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under attempts to slide the magnet the holding force is lower. Additionally, even a small distance between the magnet and the plate reduces the load capacity.
Safety rules for work with NdFeB magnets
Magnets are brittle
NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Impact of two magnets leads to them breaking into small pieces.
GPS Danger
GPS units and smartphones are highly sensitive to magnetism. Direct contact with a powerful NdFeB magnet can decalibrate the sensors in your phone.
This is not a toy
Absolutely keep magnets away from children. Ingestion danger is high, and the effects of magnets connecting inside the body are fatal.
Serious injuries
Big blocks can crush fingers in a fraction of a second. Never place your hand betwixt two strong magnets.
Handling guide
Exercise caution. Neodymium magnets attract from a distance and snap with huge force, often faster than you can move away.
Fire warning
Combustion risk: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.
Heat sensitivity
Standard neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. This process is irreversible.
Health Danger
Individuals with a pacemaker must maintain an safe separation from magnets. The magnetic field can interfere with the operation of the implant.
Skin irritation risks
It is widely known that the nickel plating (the usual finish) is a strong allergen. For allergy sufferers, refrain from touching magnets with bare hands and select encased magnets.
Threat to electronics
Data protection: Strong magnets can ruin payment cards and sensitive devices (pacemakers, hearing aids, mechanical watches).
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