← previous
next →
Product available Ships today (order by 14:00) CO2 GPSR PPWR REACH

SM 32x175 [2xM8] / N42 - magnetic separator

magnetic separator

Catalog no 130353

GTIN/EAN: 5906301813019

Diameter Ø
32 mm [±1 mm]
Height
175 mm [±1 mm]
Weight
940 g
Magnetic Flux
~ 8 000 Gauss [±5%]
technical parameters »

530.00 zł net / pcs

651.90 zł with VAT (23% VAT) / pcs

price for transport

bulk discounts:

Need more?
Quantity
Net
Gross
price from 1 pcs
530.00 zł
651.90 zł
price from 5 pcs
503.50 zł
619.31 zł
price from 10 pcs
477.00 zł
586.71 zł

Frequently asked questions

Which rod should I choose for fine contamination?
For particles below 0.5 mm — a Ø32 mm rod in grade N52, with surface induction of about 10,000 Gs. A Ø25 rod in grade N42 gives about 6,500 Gs and is chosen for contamination above 1 mm: bolts, washers, pieces of wire.
Which rod pitch should I choose?
The narrow pitch, 40 mm centre to centre, for fine free-flowing fractions — it gives denser coverage of the cross-section. The wide pitch, 50 mm, for granulates and for damp, greasy or sticky materials, where a narrow pitch risks the material bridging above the rods.
Why does efficiency drop after a few weeks of operation?
Almost always because the separator has not been cleaned. The layer of captured particles shields the field, and further particles settle on that layer rather than on the rod surface, where the gradient is far stronger. The magnets themselves do not weaken at that rate.

Guides from the knowledge base

Want to talk magnets?

Call us now +48 888 99 98 98 alternatively let us know using contact form the contact section.
Specifications and structure of a neodymium magnet can be estimated using our power calculator.

Order by 14:00 and we’ll ship today!

Technical details - SM 32x175 [2xM8] / N42 - magnetic separator

Specification / characteristics - SM 32x175 [2xM8] / N42 - magnetic separator

properties
properties values
Cat. no. 130353
GTIN/EAN 5906301813019
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 32 mm [±1 mm]
Height 175 mm [±1 mm]
Weight 940 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 8 000 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 6 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N42

Specification / characteristics SM 32x175 [2xM8] / 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 310 °C
Curie Temperature TF 590 °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 32x175 [2xM8] / N42

Parameter Value Description / Unit
Diameter (Ø) 32 mm
Total length 175 mm (L)
Active length 139 mm
Section count 6 modules
Dead zone 36 mm (2x 18mm starter)
Weight (est.) ~1070 g
Active area 140 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) 26.2 kg (theor.)
Induction (surface) ~8 000 Gauss (Max)
Max T = 80°C. Construction data for M8/M10 thread series.

Chart 2: Field profile (6 sections)

Simulation: 6 magnetic modules (pitch 23 mm).

Chart 3: Temperature performance

Technical specification and ecology

Elemental analysis

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%

Ecology and recycling (GPSR)

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: 130353-2026
Magnet Unit Converter

Force (pull)

Field Strength

Input data into any field, and all other values convert instantly.

Other offers

MPL 40x15x6 / N38 - lamellar magnet
Product available Ships today (order by 14:00)

MPL 40x15x6 / N38 - lamellar magnet

18.45 zł brutto / pcs
UMP 97x40 [M8+M10] GW F300 Lina / N38 - search holder
Product available Ships today (order by 14:00)

UMP 97x40 [M8+M10] GW F300 Lina / N38 - search holder

370.00 zł brutto / pcs
HH 42x8.8 [M6] / N38 - through hole magnetic holder
Product available Ships today (order by 14:00)

HH 42x8.8 [M6] / N38 - through hole magnetic holder

29.89 zł brutto / pcs
UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder
Product available Ships today (order by 14:00)

UMP 135x40 [M10+M12] GW F 600 kg / N38 - search holder

599.99 zł brutto / pcs
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 outer layer is hygienic acid-resistant steel, approved for food contact. The core is a precise magnetic system generating high induction (Gauss). Such construction ensures full resistance to corrosion, water, oils, and acids.
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. 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. You can choose a mounting method consistent with your technical design. We ensure fast realization of special orders and technical advice.

Strengths as well as weaknesses of Nd2Fe14B magnets.

Strengths

Besides their tremendous field intensity, neodymium magnets offer the following advantages:
  • Their power remains stable, and after around 10 years it drops only by ~1% (theoretically),
  • Magnets very well defend themselves against demagnetization caused by external fields,
  • By covering with a decorative coating of gold, the element acquires an professional look,
  • They are known for high magnetic induction at the operating surface, which improves attraction properties,
  • Through (adequate) combination of ingredients, they can achieve high thermal resistance, enabling functioning at temperatures approaching 230°C and above...
  • In view of the ability of accurate molding and customization to individualized projects, neodymium magnets can be modeled in a wide range of forms and dimensions, which expands the range of possible applications,
  • Fundamental importance in electronics industry – they are utilized in computer drives, electric motors, advanced medical instruments, and other advanced devices.
  • Compactness – despite small sizes they offer powerful magnetic field, making them ideal for precision applications

Weaknesses

Characteristics of disadvantages of neodymium magnets and proposals for their use:
  • They are fragile upon too strong impacts. To avoid cracks, it is worth securing magnets in a protective case. Such protection not only shields the magnet but also increases its resistance to damage
  • When exposed to high temperature, neodymium magnets experience a drop in strength. Often, when the temperature exceeds 80°C, their strength 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
  • Due to the susceptibility of magnets to corrosion in a humid environment, we suggest using waterproof magnets made of rubber, plastic or other material immune to moisture, when using outdoors
  • We suggest cover - magnetic mechanism, due to difficulties in creating nuts inside the magnet and complex forms.
  • Possible danger related to microscopic parts of magnets pose a threat, in case of ingestion, which gains importance in the context of child health protection. Furthermore, small components of these magnets are able to be problematic in diagnostics medical in case of swallowing.
  • Due to expensive raw materials, their price is relatively high,

Pull force analysis

Maximum magnetic pulling force – what affects it?

The specified lifting capacity concerns the limit force, recorded under ideal test conditions, specifically:
  • using a plate made of mild steel, functioning as a magnetic yoke
  • with a thickness of at least 10 mm
  • characterized by lack of roughness
  • without the slightest insulating layer between the magnet and steel
  • for force acting at a right angle (pull-off, not shear)
  • in neutral thermal conditions

What influences lifting capacity in practice

Bear in mind that the application force will differ influenced by the following factors, starting with the most relevant:
  • Space between magnet and steel – even a fraction of a millimeter of separation (caused e.g. by varnish or unevenness) drastically reduces the pulling force, often by half at just 0.5 mm.
  • Pull-off angle – note that the magnet holds strongest perpendicularly. Under shear forces, the capacity drops drastically, often to levels of 20-30% of the maximum value.
  • Element thickness – for full efficiency, the steel must be adequately massive. Paper-thin metal limits the attraction force (the magnet "punches through" it).
  • Material composition – different alloys attracts identically. Alloy additives weaken the interaction with the magnet.
  • Plate texture – smooth surfaces ensure maximum contact, which increases force. Uneven metal reduce efficiency.
  • Thermal environment – temperature increase causes a temporary drop of force. Check the thermal limit for a given model.

Holding force was checked on a smooth steel plate of 20 mm thickness, when a perpendicular force was applied, whereas under attempts to slide the magnet the lifting capacity is smaller. Moreover, even a slight gap between the magnet’s surface and the plate reduces the load capacity.

Safety rules for work with NdFeB magnets
Risk of cracking

Watch out for shards. Magnets can explode upon uncontrolled impact, launching shards into the air. Wear goggles.

Metal Allergy

Some people have a sensitization to Ni, which is the standard coating for neodymium magnets. Extended handling may cause dermatitis. It is best to wear safety gloves.

Danger to pacemakers

Health Alert: Neodymium magnets can turn off heart devices and defibrillators. Stay away if you have electronic implants.

Flammability

Dust produced during grinding of magnets is combustible. Do not drill into magnets unless you are an expert.

Keep away from electronics

An intense magnetic field disrupts the operation of magnetometers in phones and GPS navigation. Keep magnets near a smartphone to prevent damaging the sensors.

Demagnetization risk

Regular neodymium magnets (N-type) undergo demagnetization when the temperature goes above 80°C. The loss of strength is permanent.

Keep away from children

Only for adults. Tiny parts pose a choking risk, causing serious injuries. Store away from kids and pets.

Electronic hazard

Device Safety: Strong magnets can ruin payment cards and delicate electronics (heart implants, hearing aids, mechanical watches).

Physical harm

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

Respect the power

Before use, read the rules. Uncontrolled attraction can break the magnet or injure your hand. Be predictive.

Important! Want to know more? Read our article: Why are neodymium magnets dangerous?