← previous
next →
Product available Ships tomorrow CO2 GPSR PPWR REACH

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

magnetic holder external thread

Catalog no 190323

GTIN/EAN: 5906301813828

5.00
Load capacity 17.00 kg / 166.71 N
Diameter Ø
25 mm [±1 mm]
Height
17 mm [±1 mm]
Height
8 mm [±1 mm]
Weight
25 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

see technical specifications »

9.94 zł net / pcs

12.23 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
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

Frequently asked questions

Which magnetic holder is suitable for moving metal parts in a workshop?
Choose a device designed for the intended handling task and check its rated conditions, attachment point and the steel being gripped. A basic permanent-magnet holder is not a certified device for lifting a load over people.
How do I choose a holder for hanging a heavy item and check its real grip?
Compare the catalogue pull rating with the actual steel thickness, surface condition, gap and load direction. Grip along a vertical surface differs from perpendicular pull. Add an independent mechanical safeguard where falling would cause harm.
Which magnetic holders can be used outdoors?
Check the coating, housing and permitted operating conditions on the individual product card. Rubber can help protect a painted surface, but do not assume that every holder is suitable for permanent immersion or salt spray.
How should I choose a strong threaded holder for field work?
Select an internal or external thread to match the part being attached. Then check the holder dimensions, pull rating, surface condition and moisture protection. Dirt and gaps can reduce practical grip.

Guides from the knowledge base

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

Order by 14:00 and we’ll ship today!

Technical specification of the product - 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
Distributor Dhit sp. z o.o.
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
Magnetization Direction ↑ axial
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
Remanence Br ? 12.2-12.6 kGs
Remanence Br ? 1220-1260 mT
Coercivity bHc ? 10.8-11.5 kOe
Coercivity bHc ? 860-915 kA/m
Intrinsic coercivity iHc ≥ 12 kOe
Intrinsic coercivity iHc ≥ 955 kA/m
Energy product BHmax ? 36-38 BH max MGOe
Energy product BHmax ? 287-303 BH max KJ/m
Maximum working 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 310 °C
Curie Temperature TF 590 °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 and environmental data

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
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

Input your value in a single field to get results for all other units at once.

Other deals

SMZR 32x175 / N52 - magnetic separator with handle
Product available Ships tomorrow

SMZR 32x175 / N52 - magnetic separator with handle

651.90 zł brutto / pcs
MW 35x5 / N38 - cylindrical magnet
Product available Ships tomorrow

MW 35x5 / N38 - cylindrical magnet

20.95 zł brutto / pcs
SMZR 25x125 / N52 - magnetic separator with handle
Product available Ships tomorrow

SMZR 25x125 / N52 - magnetic separator with handle

522.75 zł brutto / pcs
XT-4 magnetyzery CO i WODY użytkowej - XT-4 magnetizer
Product available Ships tomorrow

XT-4 magnetyzery CO i WODY użytkowej - XT-4 magnetizer

98.99 zł brutto / pcs
This type of holder has a protruding threaded stud (screw), making it ideal for mounting in through holes. Mounting consists of inserting the screw into the hole and securing with a nut (e.g., wing nut). They are commonly used in machine building, exhibition stands, lighting, and advertising.
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 construction is durable and adapted to industrial conditions.
Above this temperature, the magnet may irreversibly lose some of its power. For furnaces, dryers, and powder coating shops, we recommend other types of magnets. Remember that even momentary overheating can weaken the holder.
Holders are equipped with standard metric threads (e.g., M4, M6, M8, M10). Exact screw dimensions can be found in the product technical table. 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. It is a solution optimized for strong holding with direct contact, not attracting from afar.

Advantages and disadvantages of Nd2Fe14B magnets.

Strengths

Besides their high retention, neodymium magnets are valued for these benefits:
  • They virtually do not lose power, because even after 10 years the performance loss is only ~1% (according to literature),
  • They possess excellent resistance to magnetism drop due to opposing magnetic fields,
  • By using a reflective coating of silver, the element has an proper look,
  • Magnets exhibit excellent magnetic induction on the working surface,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can work (depending on the form) even at a temperature of 230°C or more...
  • Considering the possibility of free forming and adaptation to individualized requirements, magnetic components can be created in a wide range of forms and dimensions, which expands the range of possible applications,
  • Universal use in future technologies – they are utilized in mass storage devices, brushless drives, medical devices, and technologically advanced constructions.
  • Compactness – despite small sizes they provide effective action, making them ideal for precision applications

Weaknesses

Cons of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon strong impact they can fracture. We advise keeping them in a strong case, which not only secures them against impacts but also raises their durability
  • Do not exceed this material temperature limit: 80°C. Overheating may permanently weaken the magnet.
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • Limited ability of making threads in the magnet and complicated shapes - recommended is casing - magnetic holder.
  • Potential hazard to health – tiny shards of magnets pose a threat, when accidentally swallowed, which gains importance in the aspect of protecting the youngest. It is also worth noting that small components of these devices are able to be problematic in diagnostics medical after entering the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Pull force analysis

Best holding force of the magnet in ideal parameters – what it depends on?

The lifting capacity listed is a result of laboratory testing conducted under standard conditions:
  • using a sheet made of high-permeability steel, functioning as a ideal flux conductor
  • whose thickness reaches at least 10 mm
  • characterized by even structure
  • with zero gap (no paint)
  • under vertical force vector (90-degree angle)
  • at ambient temperature room level

Lifting capacity in real conditions – factors

Effective lifting capacity is affected by working environment parameters, including (from priority):
  • Air gap (between the magnet and the plate), since even a microscopic clearance (e.g. 0.5 mm) leads to a reduction in force by up to 50% (this also applies to varnish, rust or dirt).
  • Angle of force application – highest force is available only during perpendicular pulling. The force required to slide of the magnet along the surface is standardly several times lower (approx. 1/5 of the lifting capacity).
  • Metal thickness – thin material does not allow full use of the magnet. Part of the magnetic field penetrates through instead of converting into lifting capacity.
  • Plate material – low-carbon steel gives the best results. Alloy steels decrease magnetic properties and lifting capacity.
  • Surface finish – ideal contact is obtained only on polished steel. Rough texture reduce the real contact area, reducing force.
  • Temperature – temperature increase results in weakening of induction. Check the maximum operating temperature for a given model.

Lifting capacity testing was conducted on a smooth plate of optimal thickness, under a perpendicular pulling force, however under attempts to slide the magnet the lifting capacity is smaller. In addition, even a small distance between the magnet and the plate decreases the holding force.

H&S for magnets
Warning for heart patients

Individuals with a pacemaker should keep an safe separation from magnets. The magnetic field can disrupt the functioning of the implant.

Heat warning

Do not exceed the maximum operating temperature stated in the specifications of the particular product. The limit depends on the material, geometry and operating arrangement; there is no single threshold for all neodymium magnets. Overheating can permanently weaken a magnet.

Powerful field

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or injure your hand. Think ahead.

Metal Allergy

A percentage of the population experience a contact allergy to Ni, which is the common plating for NdFeB magnets. Extended handling can result in an allergic reaction. We recommend wear protective gloves.

Danger to the youngest

NdFeB magnets are not suitable for play. Accidental ingestion of several magnets can lead to them pinching intestinal walls, which constitutes a direct threat to life and requires immediate surgery.

Magnets are brittle

Despite the nickel coating, the material is delicate and not impact-resistant. Do not hit, as the magnet may crumble into sharp, dangerous pieces.

Pinching danger

Large magnets can smash fingers in a fraction of a second. Do not place your hand betwixt two attracting surfaces.

GPS Danger

GPS units and mobile phones are extremely susceptible to magnetism. Direct contact with a powerful NdFeB magnet can ruin the sensors in your phone.

Keep away from computers

Very strong magnetic fields can destroy records on credit cards, hard drives, and storage devices. Keep a distance of at least 10 cm.

Dust explosion hazard

Drilling and cutting of neodymium magnets poses a fire hazard. Magnetic powder reacts violently with oxygen and is difficult to extinguish.

Safety First! Want to know more? Check our post: Are neodymium magnets dangerous?