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

UMGW 42x20x9 [M6] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180320

GTIN/EAN: 5906301813767

5.00

Diameter Ø

42 mm [±1 mm]

Height

20 mm [±1 mm]

Height

9 mm [±1 mm]

Weight

78 g

Load capacity

66.00 kg / 647.24 N

view specifications »

33.95 ZŁ with VAT / pcs + price for transport

27.60 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?
price from 1 pcs
27.60 ZŁ
33.95 ZŁ
price from 20 pcs
25.94 ZŁ
31.91 ZŁ
price from 60 pcs
24.29 ZŁ
29.87 ZŁ
Carbon Footprint – environmental impact GPSR Regulation – product safety
Not sure which magnet to buy?

Give us a call +48 22 499 98 98 otherwise contact us through our online form our website.
Specifications as well as structure of a magnet can be estimated using our our magnetic calculator.

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

Product card - UMGW 42x20x9 [M6] GW / N38 - magnetic holder internal thread

Specification / characteristics - UMGW 42x20x9 [M6] GW / N38 - magnetic holder internal thread

properties
properties values
Cat. no. 180320
GTIN/EAN 5906301813767
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 42 mm [±1 mm]
Height 20 mm [±1 mm]
Height 9 mm [±1 mm]
Weight 78 g
Load capacity ~ ? 66.00 kg / 647.24 N
Manufacturing Tolerance ±1 mm

Magnetic properties of material N38

Specification / characteristics UMGW 42x20x9 [M6] GW / N38 - magnetic holder internal 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
Engineering data and GPSR
Chemical composition
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
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: 180320-2026
Magnet Unit Converter
Magnet pull force
Field Strength
Input your figure in a box, and the remaining fields will convert instantly.

Check out also proposals

MPL 6x6x6 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 6x6x6 / N38 - lamellar magnet

0.898 ZŁ brutto / pcs
MPL 50x25x12 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 50x25x12 / N38 - lamellar magnet

45.51 ZŁ brutto / pcs
SM 32x400 [2xM8] / N42 - magnetic separator
Product available Ships today (order by 14:00)

SM 32x400 [2xM8] / N42 - magnetic separator

1193.10 ZŁ brutto / pcs
UI 17.5x5 [C310] / N38 - badge holder
Product available Ships today (order by 14:00)

UI 17.5x5 [C310] / N38 - badge holder

1.316 ZŁ brutto / pcs
The steel cup acts as an armature, concentrating the magnetic flux and increasing capacity even several times. The metal cover secures the magnet against mechanical damage, which is common in workshop conditions. The threaded hole allows creating a functional mounting point in seconds.
Too long a screw can pass through the bushing and push out or damage the magnet glued into the bottom of the cup. We recommend checking thread depth before assembly and shortening the screw if necessary. It is worth securing the thread with thread glue if the connection is to be durable and resistant to vibrations.
These holders are commonly used in industry, advertising, and construction for quick mounting. They enable creating demountable connections that can be easily moved. Ideal for fixing lighting on machine tools and welding tables.
The stated force is the maximum laboratory value obtained on a clean, smooth sheet. On a thin surface or painted cabinet, the magnet will hold much weaker (even by 50-70%). For side detachment (sliding), the force is only approx. 1/3 of nominal capacity.
The housing has anti-corrosion protection in the form of galvanic zinc or nickel plating. For outdoor applications, we recommend additional protection with varnish or choosing a rubberized (hermetic) version. The whole is well protected for standard workshop and industrial applications.

Advantages and disadvantages of rare earth magnets.

Pros

In addition to their magnetic efficiency, neodymium magnets provide the following advantages:
  • They virtually do not lose power, because even after 10 years the decline in efficiency is only ~1% (based on calculations),
  • They are extremely resistant to demagnetization induced by external field influence,
  • Thanks to the reflective finish, the surface of Ni-Cu-Ni, gold-plated, or silver-plated gives an clean appearance,
  • Neodymium magnets deliver maximum magnetic induction on a their surface, which allows for strong attraction,
  • Due to their durability and thermal resistance, neodymium magnets are capable of operate (depending on the shape) even at high temperatures reaching 230°C or more...
  • In view of the option of accurate molding and customization to custom solutions, neodymium magnets can be modeled in a wide range of forms and dimensions, which increases their versatility,
  • Fundamental importance in electronics industry – they are utilized in hard drives, electric drive systems, medical devices, and modern systems.
  • Thanks to concentrated force, small magnets offer high operating force, in miniature format,

Disadvantages

What to avoid - cons of neodymium magnets and proposals for their use:
  • To avoid cracks upon strong impacts, we suggest using special steel housings. Such a solution secures the magnet and simultaneously improves its durability.
  • Neodymium magnets demagnetize when exposed to high temperatures. After reaching 80°C, many of them experience permanent weakening of power (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 recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • We recommend a housing - magnetic mount, due to difficulties in creating nuts inside the magnet and complicated forms.
  • Health risk resulting from small fragments of magnets can be dangerous, in case of ingestion, which becomes key in the context of child health protection. Furthermore, small components of these magnets can complicate diagnosis medical after entering the body.
  • Due to complex production process, their price is higher than average,

Holding force characteristics

Maximum magnetic pulling force – what contributes to it?

The declared magnet strength represents the maximum value, obtained under laboratory conditions, namely:
  • using a sheet made of mild steel, acting as a circuit closing element
  • whose transverse dimension is min. 10 mm
  • with an polished touching surface
  • with direct contact (without impurities)
  • during pulling in a direction vertical to the mounting surface
  • at standard ambient temperature

Practical aspects of lifting capacity – factors

It is worth knowing that the application force may be lower depending on elements below, starting with the most relevant:
  • Space between surfaces – every millimeter of distance (caused e.g. by varnish or unevenness) diminishes the magnet efficiency, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field penetrates through instead of generating force.
  • Steel grade – ideal substrate is pure iron steel. Hardened steels may generate lower lifting capacity.
  • Smoothness – full contact is possible only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Thermal factor – hot environment reduces magnetic field. Exceeding the limit temperature can permanently damage the magnet.

Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, in contrast under parallel forces the holding force is lower. Additionally, even a minimal clearance between the magnet and the plate reduces the load capacity.

Safety rules for work with NdFeB magnets
Keep away from children

Adult use only. Small elements can be swallowed, leading to intestinal necrosis. Keep out of reach of children and animals.

Beware of splinters

NdFeB magnets are ceramic materials, which means they are prone to chipping. Impact of two magnets leads to them shattering into small pieces.

Precision electronics

An intense magnetic field negatively affects the functioning of compasses in phones and GPS navigation. Keep magnets close to a device to prevent breaking the sensors.

Nickel coating and allergies

It is widely known that the nickel plating (standard magnet coating) is a common allergen. If your skin reacts to metals, avoid touching magnets with bare hands or select versions in plastic housing.

Medical interference

Individuals with a pacemaker must maintain an large gap from magnets. The magnetism can stop the operation of the life-saving device.

Threat to electronics

Data protection: Strong magnets can ruin payment cards and sensitive devices (heart implants, medical aids, timepieces).

Handling rules

Use magnets with awareness. Their powerful strength can shock even experienced users. Plan your moves and do not underestimate their power.

Crushing risk

Risk of injury: The attraction force is so great that it can result in hematomas, pinching, and broken bones. Protective gloves are recommended.

Power loss in heat

Control the heat. Heating the magnet above 80 degrees Celsius will destroy its properties and pulling force.

Fire warning

Combustion risk: Rare earth powder is highly flammable. Do not process magnets without safety gear as this may cause fire.

Danger! Need more info? Read our article: Why are neodymium magnets dangerous?