![Magnet with screw UMGZ 20x15x7 [M4] GZ / N38](https://cdn3.dhit.pl/graphics/banners/magnet.webp "Magnet with screw UMGZ 20x15x7 [M4] GZ / N38")
![UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread](https://cdn3.dhit.pl/graphics/products/um-20x15x7-m4-gz-vaf.jpg)
![UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread - ujęcie 2](https://cdn3.dhit.pl/graphics/products/umgw-20x15x7-m4-gz-jeb.jpg)
UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread
magnetic holder external thread
Catalog no 190322
GTIN/EAN: 5906301813811
Diameter Ø
20 mm [±1 mm]
Height
15 mm [±1 mm]
Height
7 mm [±1 mm]
Weight
14 g
Load capacity
9.00 kg / 88.26 N
7.22 ZŁ with VAT / pcs + price for transport
5.87 ZŁ net + 23% VAT / pcs
bulk discounts:
Need more?
Give us a call
+48 888 99 98 98
alternatively send us a note through
contact form
the contact form page.
Lifting power and form of magnetic components can be verified using our
magnetic calculator.
Orders placed before 14:00 will be shipped the same business day.
Technical of the product - UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread
Specification / characteristics - UMGZ 20x15x7 [M4] GZ / N38 - magnetic holder external thread
| properties | values |
|---|---|
| Cat. no. | 190322 |
| GTIN/EAN | 5906301813811 |
| Production/Distribution | Dhit sp. z o.o. |
| Country of origin | Poland / China / Germany |
| Customs code | 85059029 |
| Diameter Ø | 20 mm [±1 mm] |
| Height | 15 mm [±1 mm] |
| Height | 7 mm [±1 mm] |
| Weight | 14 g |
| Load capacity ~ ? | 9.00 kg / 88.26 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% |
Environmental data
| recyclability (EoL) | 100% |
| recycled raw materials | ~10% (pre-cons) |
| carbon footprint | low / zredukowany |
| waste code (EWC) | 16 02 16 |
Other proposals
![UMGGW 22x6 [M4] GW / N38 - magnetic holder rubber internal thread](https://cdn3.dhit.pl/graphics/products/umg-22x6-m4-gw-jek.jpg "UMGGW 22x6 [M4] GW / N38 - magnetic holder rubber internal thread")
Pros as well as cons of rare earth magnets.
Strengths
- They do not lose strength, even over approximately ten years – the decrease in strength is only ~1% (theoretically),
- They possess excellent resistance to weakening of magnetic properties due to external magnetic sources,
- By using a shiny layer of silver, the element acquires an nice look,
- They show high magnetic induction at the operating surface, which increases their power,
- Through (appropriate) combination of ingredients, they can achieve high thermal resistance, enabling operation at temperatures approaching 230°C and above...
- Thanks to freedom in forming and the ability to adapt to individual projects,
- Key role in innovative solutions – they are used in data components, brushless drives, diagnostic systems, as well as modern systems.
- Thanks to concentrated force, small magnets offer high operating force, occupying minimum space,
Weaknesses
- To avoid cracks under impact, we recommend using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
- When exposed to high temperature, neodymium magnets suffer a drop in force. Often, when the temperature exceeds 80°C, their power 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
- They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
- Limited possibility of creating threads in the magnet and complex shapes - preferred is a housing - magnetic holder.
- Potential hazard related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Furthermore, small elements of these products can disrupt the diagnostic process medical when they are in the body.
- High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which can limit application in large quantities
Pull force analysis
Maximum holding power of the magnet – what it depends on?
- on a base made of mild steel, perfectly concentrating the magnetic flux
- possessing a thickness of minimum 10 mm to avoid saturation
- with a plane free of scratches
- without any air gap between the magnet and steel
- during pulling in a direction perpendicular to the mounting surface
- at room temperature
Determinants of lifting force in real conditions
- Space between surfaces – even a fraction of a millimeter of separation (caused e.g. by varnish or dirt) drastically reduces the pulling force, often by half at just 0.5 mm.
- Angle of force application – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the plate is usually many times lower (approx. 1/5 of the lifting capacity).
- Steel thickness – too thin plate causes magnetic saturation, causing part of the power to be lost into the air.
- Steel grade – ideal substrate is high-permeability steel. Cast iron may have worse magnetic properties.
- Surface finish – ideal contact is possible only on smooth steel. Rough texture create air cushions, weakening the magnet.
- Thermal environment – temperature increase causes a temporary drop of induction. It is worth remembering the thermal limit for a given model.
Lifting capacity testing was conducted on a smooth plate of optimal thickness, under perpendicular forces, whereas under parallel forces the lifting capacity is smaller. In addition, even a minimal clearance between the magnet and the plate decreases the load capacity.
H&S for magnets
Heat sensitivity
Standard neodymium magnets (grade N) lose magnetization when the temperature exceeds 80°C. Damage is permanent.
Do not drill into magnets
Fire warning: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.
Protect data
Avoid bringing magnets close to a wallet, laptop, or TV. The magnetism can permanently damage these devices and erase data from cards.
GPS and phone interference
Note: neodymium magnets generate a field that interferes with precision electronics. Maintain a safe distance from your mobile, device, and GPS.
Bodily injuries
Pinching hazard: The attraction force is so great that it can cause blood blisters, crushing, and broken bones. Use thick gloves.
Shattering risk
Protect your eyes. Magnets can explode upon violent connection, ejecting shards into the air. We recommend safety glasses.
Swallowing risk
Absolutely store magnets out of reach of children. Choking hazard is high, and the consequences of magnets clamping inside the body are fatal.
Nickel coating and allergies
Studies show that the nickel plating (the usual finish) is a common allergen. If your skin reacts to metals, avoid touching magnets with bare hands or select coated magnets.
Respect the power
Handle with care. Neodymium magnets act from a long distance and snap with huge force, often faster than you can move away.
Implant safety
Life threat: Strong magnets can deactivate pacemakers and defibrillators. Do not approach if you have electronic implants.
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