FAQ
Order Status

tel: +48 22 499 98 98

Strong neodymium magnets: discs and cylinders

Want to buy really powerful magnets? Our range includes wide selection of various shapes and sizes. Perfect for for domestic applications, workshop and model making. See products available immediately.

see full offer

Equipment for treasure hunters

Start your adventure with treasure salvaging! Our double-handle grips (F200, F400) provide grip certainty and immense power. Solid, corrosion-resistant housing and reinforced ropes are reliable in rivers and lakes.

find searching equipment

Magnetic mounts for industry

Reliable solutions for fixing without drilling. Threaded grips (external or internal) guarantee instant organization of work on production halls. Perfect for mounting lighting, detectors and ads.

check industrial applications

📦 Fast shipping: buy by 14:00, package goes out today!

Dhit sp. z o.o.
0
0.00 ZŁ
  1. home
  2. handles magnets internal hook as well as hook type-e
  3. magnet with hook umh 75x18x68 [m8] / n38
← previous
Product available Ships tomorrow

UMH 75x18x68 [M8] / N38 - magnetic holder with hook

magnetic holder with hook

Catalog no 310432

GTIN/EAN: 5906301814610

5.00

Diameter Ø

75 mm [±1 mm]

Height

68 mm [±1 mm]

Height

18 mm [±1 mm]

Weight

625 g

Magnetization Direction

↑ axial

Load capacity

162.00 kg / 1588.68 N

Coating

[NiCuNi] Nickel

technical parameters »

202.95 ZŁ with VAT / pcs + price for transport

165.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
165.00 ZŁ
202.95 ZŁ
price from 5 pcs
145.20 ZŁ
178.60 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Want to negotiate?

Call us now +48 888 99 98 98 if you prefer contact us using request form through our site.
Strength and appearance of magnets can be reviewed on our online calculation tool.

Orders placed before 14:00 will be shipped the same business day.

Technical specification - UMH 75x18x68 [M8] / N38 - magnetic holder with hook

Specification / characteristics - UMH 75x18x68 [M8] / N38 - magnetic holder with hook

properties
properties values
Cat. no. 310432
GTIN/EAN 5906301814610
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 75 mm [±1 mm]
Height 68 mm [±1 mm]
Height 18 mm [±1 mm]
Weight 625 g
Magnetization Direction ↑ axial
Load capacity ~ ? 162.00 kg / 1588.68 N
Coating [NiCuNi] Nickel
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMH 75x18x68 [M8] / N38 - magnetic holder with hook
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
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
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: 310432-2026
Quick Unit Converter
Force (pull)
Field Strength
Enter your figure in one of the inputs, to see the rest will convert instantly.

See also proposals

SM 25x100 [2xM8] / N52 - magnetic separator
Product available Ships tomorrow

SM 25x100 [2xM8] / N52 - magnetic separator

319.80 ZŁ brutto / pcs
SM 25x300 [2xM8] / N52 - magnetic separator
Product available Ships tomorrow

SM 25x300 [2xM8] / N52 - magnetic separator

910.20 ZŁ brutto / pcs
UI 33x13x4 [C311] / N38 - badge holder
Product available Ships tomorrow

UI 33x13x4 [C311] / N38 - badge holder

2.40 ZŁ brutto / pcs
XT-6 magnetyzery do silników - BENZYNA + POWIETRZE - XT-6 magnetizer
Product available Ships tomorrow

XT-6 magnetyzery do silników - BENZYNA + POWIETRZE - XT-6 magnetizer

94.99 ZŁ brutto / pcs
A hook magnet is an ideal solution for quick mounting of banners, signs, and markings on steel ceiling structures. In workshops and garages, they work perfectly for guiding cables or hanging work lighting.
Yes, the hook is an element screwed into a bushing with a metric thread (e.g., M4, M5, M6 - check description). Check the thread size in the product specification to select matching replacements.
You will get the greatest force by mounting the magnet on a thick, smooth steel surface vertically. For heavy ceiling ads or tools, we recommend choosing a magnet with a considerable power reserve.
The steel housing (cup) shields the magnetic field, directing all its power downwards, onto the contact surface. A bare magnet could crack upon sudden application to metal, and the holder is resistant to this.
For outdoor use (in rain), metal hangers may eventually develop a rusty coating over time. If you are looking for an outdoor hanger, choose a model in rubberized or plastic housing, which is tight.

Advantages as well as disadvantages of rare earth magnets.

Strengths

Besides their tremendous pulling force, neodymium magnets offer the following advantages:
  • They have stable power, and over more than 10 years their attraction force decreases symbolically – ~1% (in testing),
  • Magnets perfectly resist against loss of magnetization caused by ambient magnetic noise,
  • A magnet with a smooth silver surface is more attractive,
  • Neodymium magnets generate maximum magnetic induction on a small area, which increases force concentration,
  • Through (appropriate) combination of ingredients, they can achieve high thermal resistance, allowing for action at temperatures approaching 230°C and above...
  • Possibility of exact modeling as well as optimizing to atypical needs,
  • Universal use in electronics industry – they are used in data components, brushless drives, diagnostic systems, also modern systems.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Disadvantages

Disadvantages of neodymium magnets:
  • To avoid cracks under impact, we suggest using special steel housings. Such a solution secures the magnet and simultaneously increases its durability.
  • Neodymium magnets lose force when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of strength (a factor is the shape as well as dimensions of the magnet). We offer magnets specially adapted to work at temperatures up to 230°C marked [AH], which are extremely resistant to heat
  • Due to the susceptibility of magnets to corrosion in a humid environment, we advise using waterproof magnets made of rubber, plastic or other material stable to moisture, in case of application outdoors
  • Limited ability of making nuts in the magnet and complicated forms - preferred is a housing - magnet mounting.
  • Health risk to health – tiny shards of magnets are risky, in case of ingestion, which becomes key in the context of child safety. Additionally, small components of these devices are able to complicate diagnosis 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

Holding force characteristics

Detachment force of the magnet in optimal conditions – what contributes to it?

Information about lifting capacity is the result of a measurement for optimal configuration, taking into account:
  • on a plate made of mild steel, perfectly concentrating the magnetic field
  • whose thickness equals approx. 10 mm
  • characterized by even structure
  • under conditions of gap-free contact (metal-to-metal)
  • during pulling in a direction vertical to the plane
  • at temperature room level

What influences lifting capacity in practice

In real-world applications, the actual holding force is determined by a number of factors, ranked from crucial:
  • Space between surfaces – every millimeter of separation (caused e.g. by veneer or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Loading method – declared lifting capacity refers to pulling vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of maximum force).
  • Wall thickness – thin material does not allow full use of the magnet. Magnetic flux penetrates through instead of generating force.
  • Steel grade – ideal substrate is pure iron steel. Cast iron may attract less.
  • Plate texture – smooth surfaces guarantee perfect abutment, which increases field saturation. Rough surfaces weaken the grip.
  • Thermal environment – temperature increase results in weakening of force. Check the thermal limit for a given model.

Lifting capacity was assessed with the use of a smooth steel plate of suitable thickness (min. 20 mm), under vertically applied force, however under parallel forces the load capacity is reduced by as much as 75%. In addition, even a minimal clearance between the magnet’s surface and the plate lowers the lifting capacity.

Precautions when working with neodymium magnets
Do not overheat magnets

Avoid heat. Neodymium magnets are susceptible to heat. If you need operation above 80°C, ask us about HT versions (H, SH, UH).

Implant safety

Life threat: Neodymium magnets can turn off pacemakers and defibrillators. Do not approach if you have electronic implants.

Cards and drives

Do not bring magnets near a wallet, laptop, or screen. The magnetism can destroy these devices and erase data from cards.

Handling guide

Use magnets consciously. Their huge power can surprise even professionals. Be vigilant and do not underestimate their force.

Compass and GPS

Remember: rare earth magnets produce a field that disrupts sensitive sensors. Maintain a safe distance from your mobile, device, and navigation systems.

Fire risk

Mechanical processing of NdFeB material carries a risk of fire risk. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Magnet fragility

Despite the nickel coating, the material is delicate and cannot withstand shocks. Avoid impacts, as the magnet may crumble into hazardous fragments.

Choking Hazard

These products are not suitable for play. Eating several magnets may result in them pinching intestinal walls, which constitutes a direct threat to life and requires immediate surgery.

Allergy Warning

Certain individuals experience a sensitization to Ni, which is the common plating for NdFeB magnets. Prolonged contact may cause a rash. We suggest wear protective gloves.

Finger safety

Watch your fingers. Two powerful magnets will snap together immediately with a force of massive weight, destroying anything in their path. Be careful!

Attention! Need more info? Read our article: Why are neodymium magnets dangerous?
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98