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neodymium magnets

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SM 32x250 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130362

GTIN: 5906301813101

0

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

250 mm

Weight

1285 g

824.10 with VAT / pcs + price for transport

670.00 ZŁ net + 23% VAT / pcs

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SM 32x250 [2xM8] / N52 - magnetic separator
Specification/characteristics SM 32x250 [2xM8] / N52 - magnetic separator
properties
values
Cat. no.
130362
GTIN
5906301813101
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
32 mm [±0,1 mm]
Height
250 mm [±0,1 mm]
Weight
1285 g [±0,1 mm]
Manufacturing Tolerance
± 0.1 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

This product serves to effectively catch ferromagnetic contaminants from bulk and liquid products. Its task is separation (separation) of metal filings from the transported material. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The outer layer is hygienic acid-resistant steel, approved for food contact. The core is a precise magnetic system generating high induction (Gauss). Thanks to this, the rod is durable, hygienic, and easy to keep clean.
Metal contaminants are strongly attracted, so removing them with a bare hand or glove can be difficult. We recommend sticking packing tape to the cluster of filings and tearing it off together with the contaminants. In industry, cover tubes (so-called Easy Clean system) are used, from which the magnetic insert slides out.
The Gauss value tells us how effectively and deeply the magnet will catch contaminants. For basic machine protection against pieces of iron, standard power is sufficient. High Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.
We fulfill individual orders for bars perfectly matched to your machine or separator. The rod end is strictly adapted to the fastening system in your device. Contact us for a quote on a non-standard dimension.

Advantages as well as disadvantages of neodymium magnets.

In addition to their long-term stability, neodymium magnets provide the following advantages:

  • They do not lose power, even during around 10 years – the drop in power is only ~1% (based on measurements),
  • Magnets very well defend themselves against loss of magnetization caused by ambient magnetic noise,
  • By using a shiny coating of silver, the element presents an elegant look,
  • Magnetic induction on the working part 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 shape) at temperatures up to 230°C and above...
  • Possibility of individual shaping as well as modifying to individual requirements,
  • Huge importance in future technologies – they find application in HDD drives, motor assemblies, diagnostic systems, and multitasking production systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in compact dimensions, which allows their use in small systems

Characteristics of disadvantages of neodymium magnets: application proposals

  • At very strong impacts they can crack, therefore we advise placing them in special holders. A metal housing provides additional protection against damage and increases the magnet's durability.
  • When exposed to high temperature, neodymium magnets experience a drop in force. 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 rust. Therefore during using outdoors, we advise using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • We suggest a housing - magnetic holder, due to difficulties in creating nuts inside the magnet and complex forms.
  • Potential hazard related to microscopic parts of magnets pose a threat, in case of ingestion, which is particularly important in the context of child safety. Furthermore, small components of these devices are able to disrupt the diagnostic process 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

Optimal lifting capacity of a neodymium magnetwhat contributes to it?

The specified lifting capacity refers to the maximum value, obtained under laboratory conditions, specifically:

  • using a plate made of low-carbon steel, functioning as a magnetic yoke
  • whose transverse dimension is min. 10 mm
  • with a plane free of scratches
  • under conditions of gap-free contact (metal-to-metal)
  • during pulling in a direction vertical to the mounting surface
  • at ambient temperature approx. 20 degrees Celsius

Lifting capacity in real conditions – factors

In practice, the actual holding force depends on a number of factors, ranked from crucial:

  • Air gap (betwixt the magnet and the metal), as even a microscopic distance (e.g. 0.5 mm) results in a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or dirt).
  • Loading method – catalog parameter refers to pulling vertically. When applying parallel force, the magnet exhibits much less (often approx. 20-30% of maximum force).
  • Metal thickness – thin material does not allow full use of the magnet. Magnetic flux passes through the material instead of converting into lifting capacity.
  • Chemical composition of the base – mild steel gives the best results. Alloy steels decrease magnetic properties and lifting capacity.
  • Surface finish – ideal contact is possible only on polished steel. Rough texture create air cushions, weakening the magnet.
  • Thermal environment – temperature increase causes a temporary drop of induction. Check the thermal limit for a given model.

* Lifting capacity testing was performed on plates with a smooth surface of optimal thickness, under a perpendicular pulling force, however under shearing force the holding force is lower. Additionally, even a slight gap {between} the magnet and the plate decreases the load capacity.

Warnings

Conscious usage

Handle magnets consciously. Their immense force can surprise even experienced users. Plan your moves and respect their force.

Crushing force

Mind your fingers. Two powerful magnets will join instantly with a force of several hundred kilograms, destroying anything in their path. Exercise extreme caution!

Swallowing risk

Absolutely store magnets away from children. Risk of swallowing is significant, and the effects of magnets connecting inside the body are very dangerous.

Fire risk

Machining of neodymium magnets carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Power loss in heat

Control the heat. Exposing the magnet to high heat will permanently weaken its magnetic structure and strength.

Safe distance

Data protection: Neodymium magnets can damage payment cards and sensitive devices (pacemakers, medical aids, timepieces).

Implant safety

Health Alert: Strong magnets can turn off heart devices and defibrillators. Stay away if you have medical devices.

Phone sensors

Remember: neodymium magnets produce a field that interferes with sensitive sensors. Keep a safe distance from your mobile, device, and navigation systems.

Sensitization to coating

It is widely known that the nickel plating (standard magnet coating) is a potent allergen. If your skin reacts to metals, avoid direct skin contact and opt for encased magnets.

Material brittleness

Despite the nickel coating, the material is brittle and not impact-resistant. Avoid impacts, as the magnet may crumble into hazardous fragments.

Safety First!

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

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98