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neodymium magnets

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SM 32x275 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130458

GTIN: 5906301813293

0

Diameter Ø [±0,1 mm]

32 mm

Height [±0,1 mm]

275 mm

Weight

1520 g

897.90 with VAT / pcs + price for transport

730.00 ZŁ net + 23% VAT / pcs

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SM 32x275 [2xM8] / N52 - magnetic separator
Specification/characteristics SM 32x275 [2xM8] / N52 - magnetic separator
properties
values
Cat. no.
130458
GTIN
5906301813293
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
1520 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

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. Thanks to the use of strong neodymium magnets, the rod catches even metallic dust.
The rod consists of a cover tube made of high-quality acid-resistant steel (AISI 304 or 316). 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.
Due to the high power of the magnet, direct removal of filings can be troublesome and time-consuming. You can use compressed air or special non-magnetic strippers (rings). For easier operation, it is worth considering ordering a rod in a version with a cleaning sleeve.
The Gauss value tells us how effectively and deeply the magnet will catch contaminants. The economical version (8kGs) handles large pieces of metal perfectly. High Power versions (~12000-14000 Gs) are necessary for catching metallic dust, oxides, and stainless steel after processing.
We can produce a rod of non-standard length with any mounting termination. We offer various tip options: threaded holes (e.g., M8, M10), protruding screws, flat pivots, mills, or handles. Contact us for a quote on a non-standard dimension.

Strengths and weaknesses of NdFeB magnets.

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

  • They have stable power, and over around 10 years their attraction force decreases symbolically – ~1% (in testing),
  • They possess excellent resistance to magnetic field loss due to external magnetic sources,
  • In other words, due to the glossy layer of silver, the element looks attractive,
  • Magnets are distinguished by huge magnetic induction on the working surface,
  • Neodymium magnets are characterized by very high magnetic induction on the magnet surface and can function (depending on the form) even at a temperature of 230°C or more...
  • Due to the option of accurate forming and customization to specialized projects, neodymium magnets can be created in a wide range of geometric configurations, which increases their versatility,
  • Versatile presence in electronics industry – they serve a role in mass storage devices, electric drive systems, medical devices, also multitasking production systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, with minimal size,

Disadvantages of neodymium magnets:

  • 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 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 rust. Therefore during using outdoors, we suggest using waterproof magnets made of rubber, plastic or other material protecting against moisture
  • Limited possibility of producing threads in the magnet and complex shapes - recommended is cover - magnetic holder.
  • Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which becomes key in the context of child safety. Additionally, small components of these products are able to be problematic in diagnostics medical after entering the body.
  • With large orders the cost of neodymium magnets is economically unviable,

Highest magnetic holding forcewhat contributes to it?

Information about lifting capacity is the result of a measurement for the most favorable conditions, assuming:

  • using a base made of high-permeability steel, functioning as a magnetic yoke
  • whose thickness reaches at least 10 mm
  • with an ground touching surface
  • with total lack of distance (without paint)
  • during detachment in a direction perpendicular to the mounting surface
  • at temperature room level

Practical aspects of lifting capacity – factors

Holding efficiency impacted by working environment parameters, such as (from priority):

  • Gap between magnet and steel – every millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the magnet efficiency, often by half at just 0.5 mm.
  • Angle of force application – highest force is available only during perpendicular pulling. The force required to slide 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 adequately massive. Thin sheet restricts the attraction force (the magnet "punches through" it).
  • Steel type – mild steel gives the best results. Higher carbon content decrease magnetic permeability and holding force.
  • Plate texture – smooth surfaces ensure maximum contact, which increases force. Uneven metal weaken the grip.
  • Temperature – heating the magnet causes a temporary drop of induction. Check the thermal limit for a given model.

* Holding force was tested on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under shearing force the holding force is lower. Additionally, even a minimal clearance {between} the magnet’s surface and the plate decreases the lifting capacity.

Precautions when working with neodymium magnets

Do not underestimate power

Before starting, check safety instructions. Sudden snapping can destroy the magnet or injure your hand. Be predictive.

Do not overheat magnets

Regular neodymium magnets (grade N) undergo demagnetization when the temperature surpasses 80°C. This process is irreversible.

Finger safety

Pinching hazard: The attraction force is so immense that it can result in hematomas, pinching, and broken bones. Use thick gloves.

Threat to electronics

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

Skin irritation risks

A percentage of the population experience a sensitization to nickel, which is the typical protective layer for neodymium magnets. Frequent touching might lead to skin redness. It is best to use safety gloves.

Keep away from children

These products are not intended for children. Eating a few magnets can lead to them attracting across intestines, which poses a severe health hazard and necessitates urgent medical intervention.

Risk of cracking

NdFeB magnets are ceramic materials, meaning they are prone to chipping. Impact of two magnets leads to them cracking into small pieces.

Health Danger

Patients with a ICD should maintain an absolute distance from magnets. The magnetism can interfere with the operation of the implant.

Compass and GPS

A powerful magnetic field interferes with the operation of magnetometers in smartphones and navigation systems. Keep magnets near a smartphone to avoid breaking the sensors.

Do not drill into magnets

Powder generated during grinding of magnets is combustible. Avoid drilling into magnets without proper cooling and knowledge.

Attention!

Details about risks in the article: Magnet Safety Guide.

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98