tel: +48 22 499 98 98

Neodymiums – wide shape selection

Want to buy really powerful magnets? We have in stock rich assortment of various shapes and sizes. They are ideal for home use, workshop and model making. Browse assortment available immediately.

discover price list and dimensions

Grips for underwater searches

Begin your hobby involving underwater treasure hunting! Our double-handle grips (F200, F400) provide safety guarantee and immense power. Solid, corrosion-resistant housing and reinforced ropes will perform in rivers and lakes.

choose searching equipment

Magnetic mounting systems

Proven solutions for fixing non-invasive. Threaded grips (external or internal) guarantee instant organization of work on production halls. They are indispensable installing lamps, sensors and ads.

check available threads

📦 Fast shipping: buy by 14:00, we'll ship today!

Dhit sp. z o.o.
Product available Ships in 2 days

SMZR 25x200 / N52 - magnetic separator with handle

magnetic separator with handle

Catalog no 140444

GTIN/EAN: 5906301813507

5.00

Diameter Ø

25 mm [±1 mm]

Height

200 mm [±1 mm]

Weight

0.01 g

Magnetic Flux

~ 9 500 Gauss [±5%]

553.50 with VAT / pcs + price for transport

450.00 ZŁ net + 23% VAT / pcs

bulk discounts:

Need more?

price from 1 pcs
450.00 ZŁ
553.50 ZŁ
price from 5 pcs
396.00 ZŁ
487.08 ZŁ
Need advice?

Contact us by phone +48 22 499 98 98 alternatively contact us using form the contact section.
Force and form of a magnet can be estimated using our force calculator.

Same-day processing for orders placed before 14:00.

Technical - SMZR 25x200 / N52 - magnetic separator with handle

Specification / characteristics - SMZR 25x200 / N52 - magnetic separator with handle

properties
properties values
Cat. no. 140444
GTIN/EAN 5906301813507
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 25 mm [±1 mm]
Height 200 mm [±1 mm]
Weight 0.01 g
Material Type Stainless steel AISI 304 / A2
Magnetic Flux ~ 9 500 Gauss [±5%]
Size/Mount Quantity 2xM8
Polarity circumferential - 7 poles
Casing Tube Thickness 1 mm
Manufacturing Tolerance ±1 mm

Magnetic properties of material N52

Specification / characteristics SMZR 25x200 / N52 - magnetic separator with handle
properties values units
remenance Br [min. - max.] ? 14.2-14.7 kGs
remenance Br [min. - max.] ? 1420-1470 mT
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

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
SMZR 25x200 / N52

Parameter Value Description / Unit
Diameter (Ø) 25 mm
Total length 200 mm (L)
Active length 180 mm
Section count 7 modules
Dead zone 20 mm (Blaszka 2mm + Gwint 18mm)
Weight (est.) ~746 g
Active area 141 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) 22.6 kg (theor.)
Induction (surface) ~9 500 Gauss (Max)

Chart 2: Field profile (7 sections)

Chart 3: Temperature performance

Technical specification and ecology
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: 140444-2025
Quick Unit Converter
Magnet pull force

Magnetic Induction

View also deals

It is an essential at every scrap yard, waste sorting plant, and workshop. Thanks to it, you can easily and quickly assess the value of scrap and avoid mistakes. It can be used to collect scattered nails and screws from hard-to-reach places.
The tool reacts to carbon steel but does not attract most stainless steels (austenitic, like AISI 304). Lack of reaction (attraction) means the tested item is made of non-magnetic material.
The neodymium model offers powerful force with low weight, which drastically reduces hand fatigue. Strong neodymium field detects even weakly magnetic alloys and contaminants. This is a modern solution displacing heavy and weak ferrite magnets.
The neodymium magnet is enclosed in a solid, metal housing (steel or brass). The grip was designed so as not to slip in the hand, even in a work glove. The tool is durable, drop-resistant, and prepared for hard work.
In this model, collected metal must be torn off manually (preferably in a work glove). We also offer versions where pulling the handle automatically drops collected material. The sliding technique is more effective and requires less force than perpendicular tearing.

Pros and cons of Nd2Fe14B magnets.

Pros

In addition to their magnetic capacity, neodymium magnets provide the following advantages:
  • Their magnetic field remains stable, and after approximately 10 years it decreases only by ~1% (according to research),
  • Magnets perfectly protect themselves against loss of magnetization caused by external fields,
  • A magnet with a smooth gold surface has an effective appearance,
  • Magnetic induction on the working layer of the magnet turns out to be impressive,
  • Through (appropriate) combination of ingredients, they can achieve high thermal strength, allowing for operation at temperatures approaching 230°C and above...
  • In view of the possibility of free molding and adaptation to custom requirements, magnetic components can be modeled in a variety of shapes and sizes, which expands the range of possible applications,
  • Universal use in advanced technology sectors – they are used in magnetic memories, electromotive mechanisms, precision medical tools, also multitasking production systems.
  • Thanks to efficiency per cm³, small magnets offer high operating force, in miniature format,

Disadvantages

What to avoid - cons of neodymium magnets and proposals for their use:
  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We recommend keeping them in a special holder, which not only secures them against impacts but also increases their durability
  • We warn that neodymium magnets can reduce their power at high temperatures. To prevent this, we advise our specialized [AH] magnets, which work effectively even at 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, in case of application outdoors
  • We recommend cover - magnetic holder, due to difficulties in creating threads inside the magnet and complex forms.
  • Health risk related to microscopic parts of magnets are risky, in case of ingestion, which is particularly important in the context of child health protection. Additionally, small elements of these products can be problematic in diagnostics medical after entering the body.
  • With mass production the cost of neodymium magnets can be a barrier,

Holding force characteristics

Maximum lifting capacity of the magnetwhat affects it?

The declared magnet strength refers to the limit force, obtained under laboratory conditions, meaning:
  • using a sheet made of mild steel, acting as a circuit closing element
  • whose transverse dimension equals approx. 10 mm
  • characterized by smoothness
  • with zero gap (without coatings)
  • under vertical force vector (90-degree angle)
  • at standard ambient temperature

Lifting capacity in real conditions – factors

In real-world applications, the actual lifting capacity depends on a number of factors, ranked from crucial:
  • Clearance – existence of any layer (rust, dirt, gap) interrupts the magnetic circuit, which reduces power rapidly (even by 50% at 0.5 mm).
  • Load vector – maximum parameter is reached only during pulling at a 90° angle. The resistance to sliding of the magnet along the surface is standardly many times smaller (approx. 1/5 of the lifting capacity).
  • Base massiveness – insufficiently thick plate does not accept the full field, causing part of the flux to be lost into the air.
  • Material type – the best choice is high-permeability steel. Stainless steels may attract less.
  • Surface finish – ideal contact is possible only on polished steel. Any scratches and bumps create air cushions, weakening the magnet.
  • Temperature – temperature increase 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 the force acted perpendicularly, whereas under parallel forces the lifting capacity is smaller. Moreover, even a slight gap between the magnet and the plate decreases the load capacity.

Safe handling of NdFeB magnets
Keep away from electronics

A powerful magnetic field negatively affects the functioning of magnetometers in phones and GPS navigation. Do not bring magnets near a device to avoid breaking the sensors.

Powerful field

Handle with care. Neodymium magnets act from a distance and connect with massive power, often quicker than you can move away.

ICD Warning

Individuals with a heart stimulator should keep an large gap from magnets. The magnetism can disrupt the functioning of the implant.

Power loss in heat

Keep cool. NdFeB magnets are sensitive to temperature. If you require resistance above 80°C, ask us about special high-temperature series (H, SH, UH).

Dust explosion hazard

Dust produced during grinding of magnets is flammable. Avoid drilling into magnets unless you are an expert.

Crushing risk

Big blocks can break fingers instantly. Do not put your hand between two strong magnets.

Data carriers

Equipment safety: Neodymium magnets can damage data carriers and sensitive devices (heart implants, hearing aids, timepieces).

Eye protection

Neodymium magnets are sintered ceramics, which means they are prone to chipping. Collision of two magnets will cause them breaking into small pieces.

Do not give to children

Only for adults. Tiny parts can be swallowed, causing severe trauma. Keep away from kids and pets.

Avoid contact if allergic

Some people experience a sensitization to Ni, which is the common plating for NdFeB magnets. Frequent touching may cause a rash. We suggest use safety gloves.

Danger! More info about hazards in the article: Magnet Safety Guide.
Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98