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neodymium magnets

We offer red color magnetic Nd2Fe14B - our offer. All "magnets" in our store are available for immediate delivery (see the list). See the magnet pricing for more details see the magnet price list

Magnet for treasure hunters F400 GOLD

Where to buy very strong neodymium magnet? Magnetic holders in airtight and durable enclosure are ideally suited for use in difficult weather conditions, including during snow and rain see more

magnetic holders

Holders with magnets can be used to improve manufacturing, underwater discoveries, or locating meteors from gold check...

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SM 32x200 [2xM8] / N52 - magnetic separator

magnetic separator

Catalog no 130360

GTIN: 5906301813088

5

Diameter Ø

32 mm [±1 mm]

Height

200 mm [±1 mm]

Weight

1100 g

Magnetic Flux

~ 10 000 Gauss [±5%]

676.50 with VAT / pcs + price for transport

550.00 ZŁ net + 23% VAT / pcs

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SM 32x200 [2xM8] / N52 - magnetic separator
Specification/characteristics SM 32x200 [2xM8] / N52 - magnetic separator
properties
values
Cat. no.
130360
GTIN
5906301813088
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
32 mm [±1 mm]
Height
200 mm [±1 mm]
Weight
1100 g
Material Type
Stainless steel AISI 304 / A2
Magnetic Flux
~ 10 000 Gauss [±5%]
Size/Mount Quantity
2xM8
Polarity
circumferential - 7 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

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 rod consists of a cover tube made of high-quality acid-resistant steel (AISI 304 or 316). The center is filled with NdFeB magnets and pole pieces, arranged to maximize the field on the tube surface. 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.
Magnetic induction measured in Gauss (Gs) determines the density of magnetic flux on the rod surface. For basic machine protection against pieces of iron, standard power is sufficient. High induction is necessary when contaminants are microscopic or weakly magnetic.
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.

Advantages and disadvantages of rare earth magnets.

Besides their tremendous pulling force, neodymium magnets offer the following advantages:

  • They do not lose strength, even during approximately 10 years – the reduction in lifting capacity is only ~1% (theoretically),
  • Magnets effectively defend themselves against demagnetization caused by foreign field sources,
  • By covering with a shiny layer of gold, the element gains an modern look,
  • Neodymium magnets deliver maximum magnetic induction on a small area, which increases force concentration,
  • 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...
  • Considering the option of accurate forming and customization to individualized projects, magnetic components can be manufactured in a broad palette of shapes and sizes, which expands the range of possible applications,
  • Significant place in advanced technology sectors – they find application in hard drives, brushless drives, precision medical tools, also industrial machines.
  • Relatively small size with high pulling force – neodymium magnets offer strong magnetic field in compact dimensions, which enables their usage in small systems

Disadvantages of NdFeB magnets:

  • To avoid cracks under impact, we suggest using special steel housings. Such a solution protects the magnet and simultaneously improves its durability.
  • When exposed to high temperature, neodymium magnets suffer a drop in power. Often, when the temperature exceeds 80°C, their power 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
  • They rust in a humid environment. For use outdoors we suggest using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in realizing nuts and complicated shapes in magnets, we propose using casing - magnetic mount.
  • Possible danger resulting from small fragments of magnets pose a threat, in case of ingestion, which becomes key in the context of child safety. Additionally, small elements of these products are able to disrupt the diagnostic process medical after entering the body.
  • Higher cost of purchase is a significant factor to consider compared to ceramic magnets, especially in budget applications

Maximum lifting capacity of the magnetwhat affects it?

Magnet power was defined for optimal configuration, assuming:

  • using a sheet made of mild steel, functioning as a magnetic yoke
  • with a cross-section no less than 10 mm
  • with an polished touching surface
  • under conditions of ideal adhesion (metal-to-metal)
  • for force acting at a right angle (pull-off, not shear)
  • in stable room temperature

Determinants of practical lifting force of a magnet

In real-world applications, the actual lifting capacity depends on many variables, presented from the most important:

  • Distance – existence of foreign body (rust, dirt, gap) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Force direction – catalog parameter refers to detachment vertically. When applying parallel force, the magnet holds much less (typically approx. 20-30% of maximum force).
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Metal type – different alloys reacts the same. High carbon content weaken the attraction effect.
  • Plate texture – ground elements ensure maximum contact, which increases field saturation. Uneven metal reduce efficiency.
  • Temperature influence – high temperature reduces pulling force. Exceeding the limit temperature can permanently demagnetize the magnet.

* Lifting capacity testing was performed on plates with a smooth surface of suitable thickness, under a perpendicular pulling force, however under shearing force the load capacity is reduced by as much as 75%. Moreover, even a slight gap {between} the magnet and the plate decreases the lifting capacity.

Warnings

Eye protection

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

Safe operation

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

Safe distance

Do not bring magnets close to a purse, laptop, or screen. The magnetic field can irreversibly ruin these devices and erase data from cards.

Serious injuries

Risk of injury: The attraction force is so great that it can cause hematomas, pinching, and even bone fractures. Use thick gloves.

Do not overheat magnets

Avoid heat. NdFeB magnets are susceptible to heat. If you require operation above 80°C, ask us about HT versions (H, SH, UH).

Do not give to children

Strictly store magnets away from children. Choking hazard is significant, and the consequences of magnets connecting inside the body are tragic.

Threat to navigation

A strong magnetic field interferes with the functioning of compasses in phones and navigation systems. Do not bring magnets close to a smartphone to avoid breaking the sensors.

Warning for heart patients

For implant holders: Strong magnetic fields affect medical devices. Maintain minimum 30 cm distance or ask another person to handle the magnets.

Sensitization to coating

Warning for allergy sufferers: The nickel-copper-nickel coating consists of nickel. If an allergic reaction happens, cease handling magnets and use protective gear.

Combustion hazard

Combustion risk: Rare earth powder is explosive. Avoid machining magnets without safety gear as this risks ignition.

Security!

Looking for details? Check our post: Are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98