← previous
Product available Ships today (order by 14:00) CO2 GPSR PPWR REACH

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

magnetic holder internal thread

Catalog no 180420

GTIN/EAN: 5906301813798

5.00
Load capacity 162.00 kg / 1588.68 N
Diameter Ø
75 mm [±1 mm]
Height
33 mm [±1 mm]
Height
18 mm [±1 mm]
Weight
475 g
Magnetization Direction
↑ axial
Coating
[NiCuNi] Nickel

How we measure these parameters — certificates and measurements

technical specifications »

154.40 zł net / pcs

189.91 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
154.40 zł
189.91 zł
price from 5 pcs
145.14 zł
178.52 zł
price from 10 pcs
135.87 zł
167.12 zł

Frequently asked questions

How much will a magnetic holder hold in practice?
The catalogue value assumes full contact with smooth steel at least 10 mm thick and a perpendicular pull. Thinner sheet, paint, rust and surface irregularities reduce it considerably: on 1 mm sheet about half remains. Lifting and vertical mounting call for an additional safety margin.
Will a holder work on stainless steel?
Not on austenitic grades 304 and 316 — they are effectively non-magnetic. It will not work on aluminium, copper or brass either. Those materials need a mechanical gripper.
Which coating for which conditions?
Nickel-copper-nickel (NiCuNi) is the standard and covers most applications. Epoxy is used for damp environments and outdoor work, zinc is sufficient for dry interiors. Holders in a steel housing or in rubber also protect the magnet against impact.

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!

Physical properties - 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
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%

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: 180420-2026
Magnet Unit Converter

Magnet pull force

Magnetic Field

Input a number in any box, and the remaining units change instantly.

Other deals

MW 15x8 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 15x8 / N38 - cylindrical magnet

4.92 zł brutto / pcs
SM 32x450 [2xM8] / N52 - magnetic separator
Product available Ships today (order by 14:00)

SM 32x450 [2xM8] / N52 - magnetic separator

1414.50 zł brutto / pcs
MW 9.5x1 / N38 - cylindrical magnet
Product available Ships today (order by 14:00)

MW 9.5x1 / N38 - cylindrical magnet

0.295 zł brutto / pcs
MP 25x8x5 / N38 - ring magnet
Product available Ships today (order by 14:00)

MP 25x8x5 / N38 - ring magnet

5.90 zł brutto / pcs
The steel housing shields the magnetic field from the sides and top, directing all its power downwards (to the active side). Moreover, the metal housing protects the brittle neodymium magnet from cracking upon impact. The bushing with internal thread allows easy screwing of any element (bolt, hook, handle).
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 serve as a base for hooks, cable holders, organizers, and lighting systems. Ideal for fixing lighting on machine tools and welding tables.
The stated force is the maximum laboratory value obtained on a clean, smooth sheet. Air gap (rust, paint, dirt) also drastically lowers holding power. 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. However, these are not fully stainless products and may corrode with constant contact with water. The neodymium magnet itself inside is also nickel-plated.

Strengths as well as weaknesses of rare earth magnets.

Strengths

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • They virtually do not lose strength, because even after 10 years the performance loss is only ~1% (based on calculations),
  • Magnets effectively resist against loss of magnetization caused by external fields,
  • The use of an metallic finish of noble metals (nickel, gold, silver) causes the element to look better,
  • The surface of neodymium magnets generates a unique magnetic field – this is a key feature,
  • 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...
  • Due to the ability of free shaping and customization to specialized solutions, magnetic components can be produced in a wide range of geometric configurations, which increases their versatility,
  • Fundamental importance in modern technologies – they are used in HDD drives, electric drive systems, medical equipment, and industrial machines.
  • Thanks to their power density, small magnets offer high operating force, occupying minimum space,

Cons

Disadvantages of NdFeB magnets:
  • They are prone to damage upon heavy impacts. To avoid cracks, it is worth protecting magnets using a steel holder. Such protection not only protects the magnet but also increases its resistance to damage
  • 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
  • Magnets exposed to a humid environment can corrode. Therefore when using outdoors, we recommend using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We suggest cover - magnetic holder, due to difficulties in creating threads inside the magnet and complicated shapes.
  • Potential hazard resulting from small fragments of magnets can be dangerous, if swallowed, which gains importance in the context of child safety. Additionally, tiny parts of these devices are able to complicate diagnosis medical after entering the body.
  • Due to expensive raw materials, their price is higher than average,

Pull force analysis

Maximum lifting capacity of the magnet – what contributes to it?

The force parameter is a theoretical maximum value executed under the following configuration:
  • using a base made of high-permeability steel, acting as a circuit closing element
  • with a thickness minimum 10 mm
  • with a surface perfectly flat
  • with total lack of distance (without paint)
  • under axial application of breakaway force (90-degree angle)
  • in temp. approx. 20°C

What influences lifting capacity in practice

Holding efficiency is influenced by specific conditions, mainly (from priority):
  • Gap between surfaces – every millimeter of separation (caused e.g. by varnish or dirt) significantly weakens the magnet efficiency, often by half at just 0.5 mm.
  • Force direction – remember that the magnet holds strongest perpendicularly. Under sliding down, the holding force drops significantly, often to levels of 20-30% of the nominal value.
  • Base massiveness – insufficiently thick plate does not close the flux, causing part of the power to be wasted into the air.
  • Steel type – low-carbon steel attracts best. Alloy admixtures reduce magnetic properties and lifting capacity.
  • Smoothness – ideal contact is obtained only on polished steel. Rough texture create air cushions, reducing force.
  • Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they lose power, and at low temperatures gain strength (up to a certain limit).

Lifting capacity testing was performed on plates with a smooth surface 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 lifting capacity.

Safe handling of neodymium magnets
Life threat

Warning for patients: Strong magnetic fields affect electronics. Maintain at least 30 cm distance or ask another person to work with the magnets.

Bone fractures

Risk of injury: The pulling power is so immense that it can result in hematomas, crushing, and broken bones. Use thick gloves.

Electronic devices

Avoid bringing magnets close to a wallet, computer, or TV. The magnetism can irreversibly ruin these devices and erase data from cards.

Thermal limits

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

No play value

Product intended for adults. Tiny parts can be swallowed, leading to serious injuries. Store away from kids and pets.

GPS Danger

A powerful magnetic field negatively affects the functioning of compasses in smartphones and navigation systems. Maintain magnets close to a smartphone to avoid damaging the sensors.

Powerful field

Handle with care. Rare earth magnets attract from a distance and snap with huge force, often faster than you can react.

Protective goggles

NdFeB magnets are sintered ceramics, meaning they are prone to chipping. Collision of two magnets leads to them breaking into small pieces.

Warning for allergy sufferers

Certain individuals have a sensitization to Ni, which is the standard coating for neodymium magnets. Frequent touching might lead to dermatitis. We recommend use safety gloves.

Machining danger

Machining of NdFeB material poses a fire risk. Neodymium dust reacts violently with oxygen and is hard to extinguish.

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