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neodymium magnets

We offer yellow color magnetic Nd2Fe14B - our proposal. All "neodymium magnets" on our website are available for immediate delivery (see the list). See the magnet pricing for more details check the magnet price list

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SM 32x275 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130376

GTIN: 5906301813248

0

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

275 mm

Weight

1475 g

824.10 with VAT / pcs + price for transport

670.00 ZŁ net + 23% VAT / pcs

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SM 32x275 [2xM8] / N42 - magnetic separator
Specification/characteristics SM 32x275 [2xM8] / N42 - magnetic separator
properties
values
Cat. no.
130376
GTIN
5906301813248
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
32 mm [±0,1 mm]
Height
275 mm [±0,1 mm]
Weight
1475 g [±0,1 mm]
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N42

properties
values
units
remenance Br [Min. - Max.] ?
12.9-13.2
kGs
remenance Br [Min. - Max.] ?
1290-1320
T
coercivity bHc ?
10.8-12.0
kOe
coercivity bHc ?
860-955
kA/m
actual internal force iHc
≥ 12
kOe
actual internal force iHc
≥ 955
kA/m
energy density [Min. - Max.] ?
40-42
BH max MGOe
energy density [Min. - Max.] ?
318-334
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 magnetic rod is the basic element of building grate separators and magnetic filters. It is commonly used for cleaning flour, sugar, plastic granules, as well as oils and coolants. High magnetic induction on the surface allows catching the finest iron particles.
The construction relies on a sealed, welded stainless steel housing, polished smooth. Inside there is a stack of strong neodymium magnets arranged in a special configuration (magnetic circuit). 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. The most effective home method is using adhesive tape, which we wrap around the dirt and peel off. For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
The more Gauss, the smaller and more weakly magnetic particles will be effectively caught. Standard rods (~8000 Gs) are sufficient for catching screws, nails, and steel shavings. For the food and precision industry, we recommend the highest induction parameters.
We fulfill individual orders for bars perfectly matched to your machine or separator. You can choose a mounting method consistent with your technical design. Contact us for a quote on a non-standard dimension.

Advantages as well as disadvantages of neodymium magnets.

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

  • They have stable power, and over around ten years their attraction force decreases symbolically – ~1% (in testing),
  • They maintain their magnetic properties even under external field action,
  • In other words, due to the glossy layer of gold, the element gains visual value,
  • Magnets have maximum magnetic induction on the outer layer,
  • 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...
  • Thanks to modularity in forming and the capacity to modify to individual projects,
  • Key role in modern technologies – they are used in data components, brushless drives, diagnostic systems, also modern systems.
  • Relatively small size with high pulling force – neodymium magnets offer impressive pulling force in tiny dimensions, which allows their use in compact constructions

Disadvantages of NdFeB magnets:

  • Brittleness is one of their disadvantages. Upon strong impact they can break. We recommend keeping them in a special holder, which not only protects them against impacts but also increases their durability
  • We warn that neodymium magnets can reduce their strength at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 230°C.
  • Magnets exposed to a humid environment can rust. Therefore while using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Due to limitations in creating nuts and complex shapes in magnets, we propose using cover - magnetic mechanism.
  • Health risk related to microscopic parts of magnets pose a threat, if swallowed, which gains importance in the context of child health protection. Additionally, small elements of these magnets are able to complicate diagnosis 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 contributes to it?

The load parameter shown refers to the peak performance, measured under laboratory conditions, specifically:

  • using a plate made of low-carbon steel, serving as a ideal flux conductor
  • whose thickness equals approx. 10 mm
  • with a surface cleaned and smooth
  • with zero gap (no paint)
  • during pulling in a direction perpendicular to the plane
  • at room temperature

What influences lifting capacity in practice

During everyday use, the actual holding force is determined by many variables, listed from crucial:

  • Gap (between the magnet and the plate), since even a tiny distance (e.g. 0.5 mm) can cause a decrease in lifting capacity by up to 50% (this also applies to varnish, rust or debris).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under sliding down, the holding force drops drastically, often to levels of 20-30% of the nominal value.
  • Substrate thickness – to utilize 100% power, the steel must be adequately massive. Paper-thin metal limits the lifting capacity (the magnet "punches through" it).
  • Steel type – mild steel gives the best results. Higher carbon content reduce magnetic permeability and holding force.
  • Surface structure – the smoother and more polished the surface, the better the adhesion and stronger the hold. Unevenness acts like micro-gaps.
  • Operating temperature – neodymium magnets have a negative temperature coefficient. At higher temperatures they are weaker, and at low temperatures they can be stronger (up to a certain limit).

* Lifting capacity testing was carried out on plates with a smooth surface of suitable thickness, under perpendicular forces, whereas under shearing force the lifting capacity is smaller. Additionally, even a slight gap {between} the magnet and the plate reduces the lifting capacity.

Safe handling of NdFeB magnets

Skin irritation risks

It is widely known that nickel (standard magnet coating) is a common allergen. For allergy sufferers, refrain from touching magnets with bare hands and choose coated magnets.

Dust explosion hazard

Fire hazard: Neodymium dust is explosive. Avoid machining magnets without safety gear as this may cause fire.

Threat to navigation

A powerful magnetic field disrupts the functioning of compasses in smartphones and GPS navigation. Do not bring magnets near a smartphone to avoid damaging the sensors.

Pacemakers

Individuals with a ICD must keep an safe separation from magnets. The magnetism can disrupt the functioning of the implant.

Permanent damage

Regular neodymium magnets (grade N) undergo demagnetization when the temperature exceeds 80°C. The loss of strength is permanent.

Respect the power

Before use, check safety instructions. Uncontrolled attraction can destroy the magnet or hurt your hand. Think ahead.

Do not give to children

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

Beware of splinters

Despite metallic appearance, neodymium is brittle and not impact-resistant. Do not hit, as the magnet may shatter into hazardous fragments.

Electronic hazard

Equipment safety: Neodymium magnets can ruin payment cards and delicate electronics (heart implants, medical aids, mechanical watches).

Bodily injuries

Pinching hazard: The attraction force is so immense that it can result in blood blisters, pinching, and even bone fractures. Protective gloves are recommended.

Attention!

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

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98