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UMGW 75x33x18 [M10] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180420

GTIN/EAN: 5906301813798

5.00

Diameter Ø

75 mm [±1 mm]

Height

33 mm [±1 mm]

Height

18 mm [±1 mm]

Weight

475 g

Magnetization Direction

↑ axial

Load capacity

162.00 kg / 1588.68 N

Coating

[NiCuNi] Nickel

technical specifications »

189.91 ZŁ with VAT / pcs + price for transport

154.40 ZŁ net + 23% VAT / pcs

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Parameters along with form of magnetic components can be checked with our force calculator.

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Technical of the product - UMGW 75x33x18 [M10] GW / N38 - magnetic holder internal thread

Specification / characteristics - UMGW 75x33x18 [M10] GW / N38 - magnetic holder internal thread

properties
properties values
Cat. no. 180420
GTIN/EAN 5906301813798
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 33 mm [±1 mm]
Height 18 mm [±1 mm]
Weight 475 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 UMGW 75x33x18 [M10] 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
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%
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: 180420-2026
Measurement Calculator
Pulling force
Field Strength
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A magnetic holder (magnet in a steel cup) is much stronger on one side than a bare magnet of the same dimensions. Thanks to this, the holder is more durable, resistant, and safer to mount. The bushing with internal thread allows easy screwing of any element (bolt, hook, handle).
Care must be taken not to screw the bolt too deep into the magnet bushing. If the screw reaches the bottom of the bushing and is further tightened forcefully, it will destroy the magnet. You can use a spacer washer or lock nut to limit screwing depth.
They are indispensable when building exhibition stands and shop displays (POS systems). They allow mounting without drilling in steel substrate, which is crucial in rented spaces. In the workshop, they can serve as mounting points for tools or measuring instruments.
The stated force is the maximum laboratory value obtained on a clean, smooth sheet. With thin sheets (e.g., car body, fridge casing), the force will be much smaller because steel cannot absorb the entire magnetic field. We always recommend choosing a magnet with power reserve, especially if the surface is not ideal.
The housing has anti-corrosion protection in the form of galvanic zinc or nickel plating. However, these are not fully stainless products and may corrode with constant contact with water. The whole is well protected for standard workshop and industrial applications.

Pros as well as cons of neodymium magnets.

Pros

Besides their tremendous strength, neodymium magnets offer the following advantages:
  • They retain full power for nearly 10 years – the loss is just ~1% (in theory),
  • Neodymium magnets are characterized by exceptionally resistant to magnetic field loss caused by external magnetic fields,
  • Thanks to the elegant finish, the layer of Ni-Cu-Ni, gold-plated, or silver-plated gives an visually attractive appearance,
  • Magnetic induction on the top side of the magnet is strong,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Possibility of custom shaping and adjusting to defined needs,
  • Huge importance in electronics industry – they are used in computer drives, electromotive mechanisms, diagnostic systems, also technologically advanced constructions.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in tiny dimensions, which allows their use in compact constructions

Weaknesses

Disadvantages of NdFeB magnets:
  • Susceptibility to cracking is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a strong case, which not only protects them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets experience a drop in strength. 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
  • 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, when using outdoors
  • Due to limitations in realizing threads and complicated shapes in magnets, we recommend using casing - magnetic holder.
  • Possible danger resulting from small fragments of magnets pose a threat, if swallowed, which is particularly important in the context of child safety. It is also worth noting that small components of these devices can complicate diagnosis medical in case of swallowing.
  • With budget limitations the cost of neodymium magnets is a challenge,

Pull force analysis

Maximum lifting capacity of the magnet – what it depends on?

Magnet power was defined for the most favorable conditions, including:
  • on a base made of mild steel, optimally conducting the magnetic field
  • with a cross-section of at least 10 mm
  • characterized by lack of roughness
  • with total lack of distance (no paint)
  • for force acting at a right angle (in the magnet axis)
  • at ambient temperature approx. 20 degrees Celsius

Practical lifting capacity: influencing factors

It is worth knowing that the magnet holding 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 lowers power steeply (even by 50% at 0.5 mm).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Base massiveness – too thin steel causes magnetic saturation, causing part of the power to be lost to the other side.
  • Plate material – mild steel attracts best. Alloy admixtures lower magnetic permeability and holding force.
  • Smoothness – ideal contact is possible only on smooth steel. Any scratches and bumps reduce the real contact area, reducing force.
  • Heat – neodymium magnets have a sensitivity to temperature. When it is hot they are weaker, and in frost gain strength (up to a certain limit).

Lifting capacity testing was carried out on a smooth plate of suitable thickness, under perpendicular forces, however under parallel forces the lifting capacity is smaller. Moreover, even a minimal clearance between the magnet and the plate reduces the lifting capacity.

Precautions when working with neodymium magnets
Health Danger

Warning for patients: Strong magnetic fields affect medical devices. Keep minimum 30 cm distance or ask another person to handle the magnets.

GPS Danger

A powerful magnetic field negatively affects the operation of compasses in phones and GPS navigation. Keep magnets close to a smartphone to prevent breaking the sensors.

Allergy Warning

A percentage of the population have a sensitization to Ni, which is the common plating for neodymium magnets. Prolonged contact might lead to a rash. We recommend wear protective gloves.

Swallowing risk

Absolutely keep magnets away from children. Ingestion danger is significant, and the effects of magnets connecting inside the body are very dangerous.

Respect the power

Be careful. Neodymium magnets act from a long distance and snap with massive power, often faster than you can react.

Do not drill into magnets

Dust created during machining of magnets is flammable. Avoid drilling into magnets without proper cooling and knowledge.

Physical harm

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

Cards and drives

Intense magnetic fields can erase data on credit cards, hard drives, and other magnetic media. Keep a distance of min. 10 cm.

Material brittleness

Protect your eyes. Magnets can fracture upon uncontrolled impact, ejecting sharp fragments into the air. Wear goggles.

Power loss in heat

Standard neodymium magnets (grade N) lose power when the temperature goes above 80°C. Damage is permanent.

Important! More info about hazards in the article: Safety of working with magnets.