← previous
next →
Product available Ships today (order by 14:00)

UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread

magnetic holder external thread

Catalog no 190323

GTIN/EAN: 5906301813828

5.00

Diameter Ø

25 mm [±1 mm]

Height

17 mm [±1 mm]

Height

8 mm [±1 mm]

Weight

25 g

Load capacity

17.00 kg / 166.71 N

Coating

[NiCuNi] Nickel

view properties »

12.23 ZŁ with VAT / pcs + price for transport

9.94 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
9.94 ZŁ
12.23 ZŁ
price from 50 pcs
9.34 ZŁ
11.49 ZŁ
price from 100 pcs
8.75 ZŁ
10.76 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Do you have trouble choosing?

Call us now +48 22 499 98 98 alternatively contact us using request form our website.
Weight as well as shape of magnets can be verified using our magnetic calculator.

Orders submitted before 14:00 will be dispatched today!

Detailed specification - UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread

Specification / characteristics - UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread

properties
properties values
Cat. no. 190323
GTIN/EAN 5906301813828
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
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 g
Load capacity ~ ? 17.00 kg / 166.71 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGZ 25x17x8 [M5] GZ / N38 - magnetic holder external thread
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

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
Technical specification and ecology
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%
Ecology and recycling (GPSR)
recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 190323-2026
Magnet Unit Converter
Magnet pull force
Magnetic Field
Just fill in a single box, and the tool fill in the rest instantly.

See also products

UI 33x13x4 [C311] / N38 - badge holder
Product available Ships today (order by 14:00)

UI 33x13x4 [C311] / N38 - badge holder

2.40 ZŁ brutto / pcs
UMT 12x20 green / N38 - board holder
Product available Ships today (order by 14:00)

UMT 12x20 green / N38 - board holder

1.894 ZŁ brutto / pcs
MPL 40x40x15 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 40x40x15 / N38 - lamellar magnet

55.37 ZŁ brutto / pcs
BM 380x180x70 [4x M8] - magnetic beam
Product available Ships today (order by 14:00)

BM 380x180x70 [4x M8] - magnetic beam

4185.08 ZŁ brutto / pcs
A magnet with a built-in screw is great for screwing with a nut to housings, profiles, and flat bars. Thanks to this, you get a solid, magnetized mounting point without welding or gluing. Used for mounting sensors, panels, plates, and exhibition elements.
The threaded stud is an integral part of the steel housing, but avoid overtightening the thread. When assembling, use a torque wrench or tighten with feeling. The magnet itself is protected by a steel cup and is very resistant to impact.
Standard neodymium holders are adapted to work in temperatures up to 80°C. We also offer holders made of ferrite magnets (resistant up to 200°C) or special high-temperature versions. Remember that even momentary overheating can weaken the holder.
Thread size (e.g., M6) is always given in the product name and technical specification. Stud length varies depending on the model (usually from 8 to 15 mm). It is a solid threaded connection, ready for use.
Yes, the steel housing (cup) focuses the magnetic field, significantly increasing attraction force on the active side. However, such a system works point-wise and requires direct contact with metal.

Advantages as well as disadvantages of rare earth magnets.

Advantages

Besides their magnetic performance, neodymium magnets are valued for these benefits:
  • Their power is durable, and after around ten years it drops only by ~1% (theoretically),
  • They do not lose their magnetic properties even under close interference source,
  • By covering with a smooth layer of silver, the element gains an aesthetic look,
  • Neodymium magnets create maximum magnetic induction on a small area, which allows for strong attraction,
  • Thanks to resistance to high temperature, they are capable of working (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of accurate creating and adjusting to individual applications,
  • Universal use in advanced technology sectors – they are commonly used in computer drives, electromotive mechanisms, precision medical tools, also multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which makes them useful in small systems

Cons

Disadvantages of neodymium magnets:
  • To avoid cracks upon strong impacts, we suggest using special steel holders. Such a solution protects the magnet and simultaneously improves its durability.
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we suggest our specialized [AH] magnets, which work effectively even at 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 producing nuts and complex shapes in magnets, we propose using cover - magnetic holder.
  • Health risk related to microscopic parts of magnets can be dangerous, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. Additionally, small elements of these magnets are able to be problematic in diagnostics medical in case of swallowing.
  • High unit price – neodymium magnets are more expensive than other types of magnets (e.g. ferrite), which hinders application in large quantities

Holding force characteristics

Magnetic strength at its maximum – what affects it?

The lifting capacity listed is a result of laboratory testing performed under standard conditions:
  • using a sheet made of low-carbon steel, serving as a ideal flux conductor
  • with a cross-section no less than 10 mm
  • characterized by even structure
  • with zero gap (no coatings)
  • during detachment in a direction vertical to the plane
  • at standard ambient temperature

Lifting capacity in real conditions – factors

Bear in mind that the application force will differ influenced by elements below, starting with the most relevant:
  • Distance – the presence of foreign body (paint, tape, air) interrupts the magnetic circuit, which reduces power steeply (even by 50% at 0.5 mm).
  • Direction of force – highest force is reached only during perpendicular pulling. The force required to slide of the magnet along the surface is usually several times smaller (approx. 1/5 of the lifting capacity).
  • Element thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal restricts the attraction force (the magnet "punches through" it).
  • Chemical composition of the base – low-carbon steel gives the best results. Alloy steels reduce magnetic properties and lifting capacity.
  • Surface quality – the more even the surface, the larger the contact zone and higher the lifting capacity. Unevenness creates an air distance.
  • Temperature influence – high temperature reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity was determined using a polished steel plate of suitable thickness (min. 20 mm), under perpendicular detachment force, whereas under parallel forces the holding force is lower. Additionally, even a small distance between the magnet’s surface and the plate decreases the load capacity.

Safe handling of NdFeB magnets
Handling rules

Use magnets with awareness. Their immense force can surprise even experienced users. Stay alert and do not underestimate their power.

Compass and GPS

A powerful magnetic field negatively affects the functioning of compasses in smartphones and navigation systems. Do not bring magnets near a device to avoid breaking the sensors.

Data carriers

Avoid bringing magnets close to a wallet, laptop, or screen. The magnetic field can permanently damage these devices and wipe information from cards.

Warning for heart patients

Individuals with a ICD must keep an safe separation from magnets. The magnetism can stop the functioning of the life-saving device.

Fire warning

Fire hazard: Rare earth powder is explosive. Avoid machining magnets in home conditions as this risks ignition.

Sensitization to coating

Medical facts indicate that the nickel plating (the usual finish) is a strong allergen. If you have an allergy, refrain from direct skin contact and select encased magnets.

Do not overheat magnets

Control the heat. Exposing the magnet above 80 degrees Celsius will ruin its properties and strength.

Hand protection

Large magnets can break fingers instantly. Under no circumstances place your hand betwixt two strong magnets.

Shattering risk

Neodymium magnets are ceramic materials, meaning they are fragile like glass. Collision of two magnets will cause them shattering into small pieces.

Danger to the youngest

NdFeB magnets are not suitable for play. Eating multiple magnets may result in them attracting across intestines, which constitutes a direct threat to life and requires immediate surgery.

Security! Looking for details? Check our post: Are neodymium magnets dangerous?