![Magnet with screw UMGZ 42x20x9 [M8] GZ / N38](https://cdn3.dhit.pl/graphics/banners/magnet.webp "Magnet with screw UMGZ 42x20x9 [M8] GZ / N38")
![UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread](https://cdn3.dhit.pl/graphics/products/um-42x20x9-m8-gz-fof.jpg)
![UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread - ujęcie 2](https://cdn3.dhit.pl/graphics/products/umgw-42x20x9-m8-gz-cer.jpg)
UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread
magnetic holder external thread
Catalog no 190332
GTIN/EAN: 5906301813859
Diameter Ø
42 mm [±1 mm]
Height
20 mm [±1 mm]
Height
9 mm [±1 mm]
Weight
80 g
Load capacity
66.00 kg / 647.24 N
33.96 ZŁ with VAT / pcs + price for transport
27.61 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Call us now
+48 22 499 98 98
if you prefer let us know by means of
our online form
the contact section.
Parameters along with appearance of neodymium magnets can be analyzed using our
online calculation tool.
Order by 14:00 and we’ll ship today!
Technical details - UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread
Specification / characteristics - UMGZ 42x20x9 [M8] GZ / N38 - magnetic holder external thread
| properties | values |
|---|---|
| Cat. no. | 190332 |
| GTIN/EAN | 5906301813859 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 42 mm [±1 mm] |
| Height | 20 mm [±1 mm] |
| Height | 9 mm [±1 mm] |
| Weight | 80 g |
| Load capacity ~ ? | 66.00 kg / 647.24 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 |
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 |
View also products
Pros as well as cons of neodymium magnets.
Advantages
- They retain attractive force for nearly 10 years – the drop is just ~1% (in theory),
- They are extremely resistant to demagnetization induced by external field influence,
- The use of an aesthetic coating of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
- Neodymium magnets ensure maximum magnetic induction on a contact point, which allows for strong attraction,
- Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the shape) even at a temperature of 230°C or more...
- Possibility of accurate forming as well as adjusting to specific applications,
- Wide application in modern technologies – they find application in data components, brushless drives, precision medical tools, as well as multitasking production systems.
- Relatively small size with high pulling force – neodymium magnets offer high power in compact dimensions, which enables their usage in miniature devices
Weaknesses
- They are prone to damage 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
- When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength 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
- When exposed to humidity, magnets start to rust. For applications outside, it is recommended to use protective magnets, such as magnets in rubber or plastics, which prevent oxidation and corrosion.
- We suggest casing - magnetic mount, due to difficulties in producing threads inside the magnet and complicated shapes.
- Possible danger to health – tiny shards of magnets can be dangerous, when accidentally swallowed, which gains importance in the context of child safety. Additionally, small components of these magnets can be problematic in diagnostics medical when they are in the body.
- Due to complex production process, their price is higher than average,
Pull force analysis
Optimal lifting capacity of a neodymium magnet – what contributes to it?
- using a base made of mild steel, acting as a ideal flux conductor
- whose thickness equals approx. 10 mm
- characterized by smoothness
- without the slightest air gap between the magnet and steel
- for force acting at a right angle (in the magnet axis)
- at ambient temperature room level
Practical aspects of lifting capacity – factors
- Air gap (betwixt the magnet and the metal), because even a tiny clearance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to paint, rust or debris).
- Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
- Plate thickness – too thin steel causes magnetic saturation, causing part of the power to be escaped into the air.
- Steel grade – the best choice is pure iron steel. Hardened steels may have worse magnetic properties.
- Surface condition – smooth surfaces ensure maximum contact, which increases field saturation. Uneven metal weaken the grip.
- Thermal environment – temperature increase causes a temporary drop of force. Check the maximum operating temperature for a given model.
Lifting capacity was measured using a smooth steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, in contrast under shearing force the load capacity is reduced by as much as fivefold. Additionally, even a slight gap between the magnet and the plate reduces the load capacity.
Precautions when working with NdFeB magnets
Keep away from computers
Equipment safety: Neodymium magnets can ruin data carriers and delicate electronics (heart implants, medical aids, mechanical watches).
Sensitization to coating
Studies show that the nickel plating (the usual finish) is a common allergen. For allergy sufferers, avoid touching magnets with bare hands and select versions in plastic housing.
Do not overheat magnets
Watch the temperature. Exposing the magnet to high heat will ruin its properties and strength.
Do not drill into magnets
Combustion risk: Neodymium dust is explosive. Do not process magnets without safety gear as this risks ignition.
Magnets are brittle
NdFeB magnets are ceramic materials, which means they are prone to chipping. Clashing of two magnets leads to them shattering into shards.
Pacemakers
Health Alert: Strong magnets can turn off pacemakers and defibrillators. Do not approach if you have medical devices.
Handling rules
Be careful. Rare earth magnets act from a distance and snap with huge force, often faster than you can react.
Crushing risk
Large magnets can break fingers in a fraction of a second. Never put your hand between two strong magnets.
Keep away from children
These products are not toys. Accidental ingestion of multiple magnets may result in them connecting inside the digestive tract, which constitutes a severe health hazard and necessitates immediate surgery.
Threat to navigation
Be aware: rare earth magnets produce a field that disrupts precision electronics. Keep a separation from your phone, tablet, and GPS.
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