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neodymium magnets

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UMGW 60x30x15 [M10] GW / N38 - magnetic holder internal thread

magnetic holder internal thread

Catalog no 180419

GTIN: 5906301813781

5

Diameter Ø [±0,1 mm]

60 mm

Height [±0,1 mm]

30 mm

Height [±0,1 mm]

15 mm

Weight

260 g

Load capacity

112 kg / 1098.34 N

102.96 with VAT / pcs + price for transport

83.71 ZŁ net + 23% VAT / pcs

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UMGW 60x30x15 [M10] GW / N38 - magnetic holder internal thread
Specification/characteristics UMGW 60x30x15 [M10] GW / N38 - magnetic holder internal thread
properties
values
Cat. no.
180419
GTIN
5906301813781
Production/Distribution
Dhit sp. z o.o.
Country of origin
Poland / China / Germany
Customs code
85059029
Diameter Ø
60 mm [±0,1 mm]
Height
30 mm [±0,1 mm]
Height
15 mm [±0,1 mm]
Weight
260 g [±0,1 mm]
Load capacity ~ ?
112 kg / 1098.34 N
Manufacturing Tolerance
± 0.1 mm

Magnetic properties of material N38

properties
values
units
remenance Br [Min. - Max.] ?
12.2-12.6
kGs
remenance Br [Min. - Max.] ?
1220-1260
T
coercivity bHc ?
10.8-11.5
kOe
coercivity bHc ?
860-915
kA/m
actual internal force iHc
≥ 12
kOe
actual internal force iHc
≥ 955
kA/m
energy density [Min. - Max.] ?
36-38
BH max MGOe
energy density [Min. - Max.] ?
287-303
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

The steel housing shields the magnetic field from the sides and top, directing all its power downwards (to the active side). Thanks to this, the holder is more durable, resistant, and safer to mount. The bushing with internal thread allows easy screwing of any element (bolt, hook, handle).
Too long a screw can pass through the bushing and push out or damage the magnet glued into the bottom of the cup. If the screw reaches the bottom of the bushing and is further tightened forcefully, it will destroy the magnet. You can use a spacer washer or lock nut to limit screwing depth.
They are indispensable when building exhibition stands and shop displays (POS systems). They serve as a base for hooks, cable holders, organizers, and lighting systems. In the workshop, they can serve as mounting points for tools or measuring instruments.
The stated force is the maximum laboratory value obtained on a clean, smooth sheet. Air gap (rust, paint, dirt) also drastically lowers holding power. For side detachment (sliding), the force is only approx. 1/3 of nominal capacity.
Standard coating effectively protects against moisture in indoor conditions. For outdoor applications, we recommend additional protection with varnish or choosing a rubberized (hermetic) version. The whole is well protected for standard workshop and industrial applications.

Advantages as well as disadvantages of rare earth magnets.

Besides their tremendous strength, neodymium magnets offer the following advantages:

  • They do not lose magnetism, even after around ten years – the drop in power is only ~1% (theoretically),
  • They feature excellent resistance to magnetism drop as a result of external fields,
  • In other words, due to the aesthetic layer of gold, the element gains visual value,
  • Magnetic induction on the top side of the magnet remains maximum,
  • Thanks to resistance to high temperature, they are able to function (depending on the form) even at temperatures up to 230°C and higher...
  • Possibility of custom forming as well as adjusting to specific requirements,
  • Versatile presence in innovative solutions – they serve a role in data components, electric motors, precision medical tools, also modern systems.
  • Thanks to their power density, small magnets offer high operating force, with minimal size,

Disadvantages of NdFeB magnets:

  • Brittleness is one of their disadvantages. Upon intense impact they can fracture. We advise keeping them in a special holder, which not only secures them against impacts but also increases their durability
  • When exposed to high temperature, neodymium magnets experience a drop in force. 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
  • When exposed to humidity, magnets usually rust. To use them in conditions outside, it is recommended to use protective magnets, such as those in rubber or plastics, which prevent oxidation as well as corrosion.
  • Due to limitations in realizing nuts and complex shapes in magnets, we recommend using casing - magnetic mechanism.
  • Possible danger related to microscopic parts of magnets pose a threat, if swallowed, which is particularly important in the aspect of protecting the youngest. Additionally, tiny parts of these magnets are able to be problematic in diagnostics medical after entering the body.
  • Due to complex production process, their price is relatively high,

Optimal lifting capacity of a neodymium magnetwhat it depends on?

The specified lifting capacity refers to the peak performance, recorded under optimal environment, meaning:

  • on a block made of structural steel, effectively closing the magnetic field
  • possessing a thickness of at least 10 mm to avoid saturation
  • characterized by lack of roughness
  • under conditions of gap-free contact (metal-to-metal)
  • for force applied at a right angle (in the magnet axis)
  • at room temperature

Determinants of lifting force in real conditions

It is worth knowing that the magnet holding may be lower depending on the following factors, starting with the most relevant:

  • Distance – existence of any layer (paint, dirt, air) acts as an insulator, which lowers capacity steeply (even by 50% at 0.5 mm).
  • Pull-off angle – remember that the magnet has greatest strength perpendicularly. Under shear forces, the capacity drops significantly, often to levels of 20-30% of the nominal value.
  • Metal thickness – the thinner the sheet, the weaker the hold. Part of the magnetic field passes through the material instead of converting into lifting capacity.
  • Metal type – not every steel attracts identically. Alloy additives worsen the attraction effect.
  • Surface condition – ground elements guarantee perfect abutment, which increases field saturation. Rough surfaces reduce efficiency.
  • Thermal factor – hot environment reduces magnetic field. Exceeding the limit temperature can permanently demagnetize the magnet.

* Lifting capacity testing was performed on a smooth plate of optimal thickness, under a perpendicular pulling force, in contrast under shearing force the lifting capacity is smaller. In addition, even a slight gap {between} the magnet and the plate decreases the holding force.

Safe handling of neodymium magnets

Demagnetization risk

Watch the temperature. Exposing the magnet above 80 degrees Celsius will destroy its magnetic structure and pulling force.

Sensitization to coating

Studies show that the nickel plating (the usual finish) is a common allergen. If you have an allergy, refrain from direct skin contact and opt for versions in plastic housing.

Material brittleness

Neodymium magnets are ceramic materials, which means they are prone to chipping. Impact of two magnets leads to them cracking into shards.

Powerful field

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

Protect data

Very strong magnetic fields can corrupt files on credit cards, HDDs, and storage devices. Maintain a gap of min. 10 cm.

Magnetic interference

Note: neodymium magnets produce a field that disrupts sensitive sensors. Maintain a separation from your phone, device, and navigation systems.

Medical interference

Life threat: Strong magnets can turn off pacemakers and defibrillators. Stay away if you have medical devices.

Danger to the youngest

Absolutely store magnets away from children. Choking hazard is significant, and the effects of magnets connecting inside the body are very dangerous.

Hand protection

Big blocks can break fingers in a fraction of a second. Under no circumstances place your hand between two attracting surfaces.

Do not drill into magnets

Mechanical processing of NdFeB material carries a risk of fire hazard. Magnetic powder oxidizes rapidly with oxygen and is hard to extinguish.

Safety First!

Need more info? Check our post: Why are neodymium magnets dangerous?

Dhit sp. z o.o.

e-mail: bok@dhit.pl

tel: +48 888 99 98 98