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SM 18x275 [2xM5] / N42 - magnetic separator

magnetic separator

Catalog no 130276

GTIN/EAN: 5906301812784

5.00
Diameter Ø
18 mm [±1 mm]
Height
275 mm [±1 mm]
Weight
0.01 g
Magnetic Flux
~ 5 400 Gauss [±5%]
technical specifications »

608.85 zł with VAT / pcs + price for transport

495.00 zł net + 23% VAT / pcs

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Technical - SM 18x275 [2xM5] / N42 - magnetic separator

Specification / characteristics - SM 18x275 [2xM5] / N42 - magnetic separator

properties
properties values
Cat. no. 130276
GTIN/EAN 5906301812784
Production/Distribution Dhit sp. z o.o.
ul. Zielona 14 05-850 Ożarów Mazowiecki PL
Country of origin Poland / China / Germany
Customs code 85059029
Diameter Ø 18 mm [±1 mm]
Height 275 mm [±1 mm]
Weight 0.01 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 5 400 Gauss [±5%]
Size/Mount Quantity 2xM5
Polarity circumferential - 12 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 18x275 [2xM5] / N42 - magnetic separator
properties values units
remenance Br [min. - max.] ? 12.9-13.2 kGs
remenance Br [min. - max.] ? 1290-1320 mT
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

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 10-6 °C-1
Thermal expansion perpendicular (⊥) to orientation (M) -(1-3) x 10-6 °C-1
Young's modulus 1.7 x 104 kg/mm²

Table 1: Rod construction
SM 18x275 [2xM5] / N42

Parameter Value Description / Unit
Diameter (Ø) 18 mm
Total length 275 mm (L)
Active length 239 mm
Section count 10 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~532 g
Active area 135 cm² (Area)
Housing material AISI 304 1.4301 (Inox)
Surface finish Ra < 0.8 µm Polished
Temp. class 80°C Standard (N)
Force loss (at max °C) -12.8% Reversible loss (physics)
Force (calculated) 3.8 kg (theor.)
Induction (surface) ~5 400 Gauss (Max)
Max T = 80°C. Construction data for M8/M10 thread series.

Chart 2: Field profile (10 sections)

Simulation: 10 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

Engineering data and GPSR

Material specification

iron (Fe) 64% – 68%
neodymium (Nd) 29% – 32%
boron (B) 1.1% – 1.2%
dysprosium (Dy) 0.5% – 2.0%
coating (Ni-Cu-Ni) < 0.05%

Sustainability

recyclability (EoL) 100%
recycled raw materials ~10% (pre-cons)
carbon footprint low / zredukowany
waste code (EWC) 16 02 16
Safety card (GPSR)
responsible entity
Dhit sp. z o.o.
ul. Kościuszki 6A, 05-850 Ożarów Mazowiecki
tel: +48 22 499 98 98 | e-mail: bok@dhit.pl
batch number/type
id: 130276-2026
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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 construction relies on a sealed, welded stainless steel housing, polished smooth. 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 filings stick to the surface very strongly, so cleaning requires strength or cleverness. 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. 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. The rod end is strictly adapted to the fastening system in your device. We ensure fast realization of special orders and technical advice.

Pros as well as cons of rare earth magnets.

Pros

Besides their high retention, neodymium magnets are valued for these benefits:
  • Their magnetic field is durable, and after around 10 years it drops only by ~1% (theoretically),
  • Magnets very well resist against loss of magnetization caused by foreign field sources,
  • The use of an metallic finish of noble metals (nickel, gold, silver) causes the element to be more visually attractive,
  • They feature high magnetic induction at the operating surface, which improves attraction properties,
  • Made from properly selected components, these magnets show impressive resistance to high heat, enabling them to function (depending on their form) at temperatures up to 230°C and above...
  • Thanks to versatility in constructing and the capacity to customize to specific needs,
  • Huge importance in electronics industry – they find application in magnetic memories, electric drive systems, precision medical tools, also other advanced devices.
  • Relatively small size with high pulling force – neodymium magnets offer high power in tiny dimensions, which makes them useful in small systems

Weaknesses

Disadvantages of neodymium magnets:
  • At strong impacts they can crack, therefore we advise placing them in steel cases. A metal housing provides additional protection against damage, as well as increases the magnet's durability.
  • Neodymium magnets lose their strength under the influence of heating. As soon as 80°C is exceeded, many of them start losing their power. Therefore, we recommend our special magnets marked [AH], which maintain durability even at temperatures up to 230°C
  • They oxidize in a humid environment. For use outdoors we advise using waterproof magnets e.g. in rubber, plastic
  • Due to limitations in producing nuts and complex forms in magnets, we propose using casing - magnetic mount.
  • Possible danger related to microscopic parts of magnets pose a threat, when accidentally swallowed, which gains importance in the context of child safety. Additionally, tiny parts of these magnets can disrupt the diagnostic process medical in case of swallowing.
  • High unit price – neodymium magnets have a higher price than other types of magnets (e.g. ferrite), which increases costs of application in large quantities

Lifting parameters

Maximum magnetic pulling force – what affects it?

The load parameter shown refers to the limit force, obtained under optimal environment, namely:
  • on a base made of structural steel, perfectly concentrating the magnetic field
  • whose thickness reaches at least 10 mm
  • characterized by lack of roughness
  • without any air gap between the magnet and steel
  • for force applied at a right angle (pull-off, not shear)
  • at ambient temperature approx. 20 degrees Celsius

Determinants of lifting force in real conditions

During everyday use, the real power results from a number of factors, listed from most significant:
  • Distance – the presence of foreign body (paint, tape, gap) acts as an insulator, which reduces power rapidly (even by 50% at 0.5 mm).
  • Angle of force application – maximum parameter is reached only during pulling at a 90° angle. The force required to slide of the magnet along the surface is typically many times lower (approx. 1/5 of the lifting capacity).
  • Steel thickness – too thin sheet causes magnetic saturation, causing part of the flux to be lost to the other side.
  • Material composition – different alloys attracts identically. Alloy additives weaken the attraction effect.
  • Smoothness – full contact is possible only on smooth steel. Any scratches and bumps create air cushions, reducing force.
  • Thermal environment – heating the magnet results in weakening of force. It is worth remembering the thermal limit for a given model.

Holding force was checked on the plate surface of 20 mm thickness, when a perpendicular force was applied, in contrast under parallel forces the holding force is lower. In addition, even a small distance between the magnet’s surface and the plate reduces the load capacity.

H&S for magnets
Fire warning

Machining of NdFeB material carries a risk of fire hazard. Magnetic powder reacts violently with oxygen and is hard to extinguish.

Allergic reactions

A percentage of the population have a sensitization to Ni, which is the typical protective layer for NdFeB magnets. Prolonged contact can result in dermatitis. We suggest wear protective gloves.

Finger safety

Big blocks can smash fingers in a fraction of a second. Do not put your hand between two strong magnets.

Keep away from computers

Data protection: Strong magnets can ruin payment cards and delicate electronics (pacemakers, medical aids, mechanical watches).

Shattering risk

Despite metallic appearance, the material is brittle and cannot withstand shocks. Avoid impacts, as the magnet may crumble into sharp, dangerous pieces.

Thermal limits

Avoid heat. Neodymium magnets are susceptible to temperature. If you need resistance above 80°C, look for special high-temperature series (H, SH, UH).

Conscious usage

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

GPS and phone interference

An intense magnetic field negatively affects the operation of magnetometers in phones and navigation systems. Do not bring magnets close to a smartphone to prevent damaging the sensors.

Implant safety

People with a ICD must maintain an large gap from magnets. The magnetic field can stop the functioning of the implant.

Keep away from children

Neodymium magnets are not toys. Eating several magnets can lead to them attracting across intestines, which poses a critical condition and requires immediate surgery.

Safety First! Details about risks in the article: Safety of working with magnets.