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neodymium magnets

We provide red color magnets Nd2Fe14B - our proposal. Practically all magnesy on our website are available for immediate purchase (see the list). See the magnet pricing for more details see the magnet price list

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SMZR 32x125 / N52 - magnetic separator with handle

magnetic separator with handle

Catalog no 140238

GTIN: 5906301813460

5

Diameter Ø

32 mm [±1 mm]

Height

125 mm [±1 mm]

Weight

690 g

Magnetic Flux

~ 10 000 Gauss [±5%]

430.50 with VAT / pcs + price for transport

350.00 ZŁ net + 23% VAT / pcs

bulk discounts:

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price from 1 pcs
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430.50 ZŁ
price from 5 pcs
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price from 10 pcs
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Weight as well as form of a neodymium magnet can be checked using our force calculator.

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SMZR 32x125 / N52 - magnetic separator with handle
Specification/characteristics SMZR 32x125 / N52 - magnetic separator with handle
properties
values
Cat. no.
140238
GTIN
5906301813460
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
32 mm [±1 mm]
Height
125 mm [±1 mm]
Weight
690 g
Material Type
Stainless steel AISI 304 / A2
Magnetic Flux
~ 10 000 Gauss [±5%]
Size/Mount Quantity
2xM8
Polarity
circumferential - 4 poles
Casing Tube Thickness
1 mm
Manufacturing Tolerance
±1 mm

Magnetic properties of material N52

properties
values
units
remenance Br [Min. - Max.] ?
14.2-14.7
kGs
remenance Br [Min. - Max.] ?
1420-1470
T
coercivity bHc ?
10.8-12.5
kOe
coercivity bHc ?
860-995
kA/m
actual internal force iHc
≥ 12
kOe
actual internal force iHc
≥ 955
kA/m
energy density [Min. - Max.] ?
48-53
BH max MGOe
energy density [Min. - Max.] ?
380-422
BH max KJ/m
max. temperature ?
≤ 80
°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 106
°C-1
Thermal expansion perpendicular (⊥) to orientation (M)
-(1-3) x 10-6
°C-1
Young's modulus
1.7 x 104
kg/mm²

Shopping tips

A manual separator is a basic tool for quick identification and sorting of metals. It enables effective segregation of materials in the yard and accepting goods. It can be used to collect scattered nails and screws from hard-to-reach places.
A neodymium magnet attracts only ferromagnetic metals, such as ordinary steel (black) and cast iron. Lack of reaction (attraction) means the tested item is made of non-magnetic material.
The neodymium model offers powerful force with low weight, which drastically reduces hand fatigue. A lighter tool allows for longer work without wrist and arm pain. The neodymium version is currently the standard in professional scrap yards.
The neodymium magnet is enclosed in a solid, metal housing (steel or brass). Tool ergonomics are key with frequent use by employees. The tool is durable, drop-resistant, and prepared for hard work.
Standard manual separators (such as SMZR 32x125 / N52) do not have a release mechanism and require manual cleaning. We also offer versions where pulling the handle automatically drops collected material. In the case of strong magnets, it is easiest to slide the metal to the side of the housing instead of tearing it straight off.

Advantages as well as disadvantages of neodymium magnets.

Besides their high retention, neodymium magnets are valued for these benefits:

  • Their power remains stable, and after around ten years it decreases only by ~1% (theoretically),
  • Neodymium magnets are characterized by remarkably resistant to loss of magnetic properties caused by external interference,
  • 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 maximum magnetic field – this is a distinguishing feature,
  • Neodymium magnets are characterized by extremely high magnetic induction on the magnet surface and are able to act (depending on the shape) even at a temperature of 230°C or more...
  • In view of the option of precise molding and adaptation to custom projects, NdFeB magnets can be created in a broad palette of shapes and sizes, which expands the range of possible applications,
  • Fundamental importance in future technologies – they are commonly used in HDD drives, electric drive systems, advanced medical instruments, as well as other advanced devices.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

What to avoid - cons of neodymium magnets and proposals for their use:

  • At strong impacts they can break, therefore we advise placing them in strong housings. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their strength decreases (depending on the size and 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 recommend using waterproof magnets made of rubber, plastic or other material immune to moisture, in case of application outdoors
  • Due to limitations in creating threads and complicated forms in magnets, we propose using casing - magnetic mechanism.
  • Potential hazard resulting from small fragments of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. Additionally, small components of these magnets can be problematic in diagnostics medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Detachment force of the magnet in optimal conditionswhat it depends on?

Breakaway force was defined for optimal configuration, assuming:

  • with the contact of a sheet made of special test steel, ensuring maximum field concentration
  • possessing a thickness of min. 10 mm to avoid saturation
  • with an polished touching surface
  • without any insulating layer between the magnet and steel
  • during pulling in a direction vertical to the mounting surface
  • in neutral thermal conditions

Impact of factors on magnetic holding capacity in practice

Real force is affected by working environment parameters, mainly (from priority):

  • Gap (betwixt the magnet and the plate), because even a microscopic distance (e.g. 0.5 mm) can cause a reduction in lifting capacity by up to 50% (this also applies to paint, rust or dirt).
  • Load vector – maximum parameter is obtained only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly several times smaller (approx. 1/5 of the lifting capacity).
  • Substrate thickness – for full efficiency, the steel must be sufficiently thick. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Steel grade – the best choice is high-permeability steel. Cast iron may attract less.
  • Surface finish – full contact is obtained only on smooth steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Thermal environment – temperature increase causes a temporary drop of force. Check the maximum operating temperature for a given model.

* Lifting capacity testing was carried out on plates with a smooth surface of optimal thickness, under perpendicular forces, whereas under attempts to slide the magnet the load capacity is reduced by as much as 5 times. In addition, even a small distance {between} the magnet and the plate reduces the lifting capacity.

Safety rules for work with NdFeB magnets

Bodily injuries

Danger of trauma: The pulling power is so immense that it can result in blood blisters, pinching, and broken bones. Protective gloves are recommended.

Adults only

Only for adults. Small elements pose a choking risk, leading to severe trauma. Keep away from children and animals.

Life threat

Warning for patients: Strong magnetic fields disrupt electronics. Maintain minimum 30 cm distance or request help to work with the magnets.

Powerful field

Use magnets with awareness. Their immense force can shock even experienced users. Stay alert and respect their force.

Dust is flammable

Fire hazard: Neodymium dust is highly flammable. Do not process magnets in home conditions as this risks ignition.

Thermal limits

Standard neodymium magnets (N-type) lose magnetization when the temperature exceeds 80°C. This process is irreversible.

Electronic devices

Do not bring magnets near a wallet, computer, or TV. The magnetic field can irreversibly ruin these devices and wipe information from cards.

GPS and phone interference

GPS units and mobile phones are extremely susceptible to magnetism. Close proximity with a strong magnet can permanently damage the internal compass in your phone.

Material brittleness

Despite metallic appearance, neodymium is delicate and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Skin irritation risks

Allergy Notice: The nickel-copper-nickel coating consists of nickel. If redness occurs, immediately stop working with magnets and use protective gear.

Caution!

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

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98