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Betaflex® (magnetic rubber)

The flexible permanent magnet that you can work yourself. Cutting, punching, drilling and sawing with normal tools.

Betaflex is a remarkable magnet material made of flexible rubber-like plastic with barium or strontium ferrite powders imbedded. During production the magnetic orientation (anisotropy) is made parallel to the thickness of the material, resulting in superior properties. /p>

Betaflex can also be worked in magnetized condition with normal tools and is insensitive to demagnetising influences.

Product description
Application

The energy product of Betaflex is higher than that of sintered isotropic barium ferrite (Oxyd 100). Many interesting applications are therefore possible.

By bending Betaflex strips into circular shapes, ring magnets with radial orientation can be produced As a result, small DC motors can be produced by inserting this shaped magnetic ring into the stator sleeve.

Good and effective applications are possible in contactless position indicators with magnetic switches.

Hardness: (Shore A) 90 ≃ 100
Radius for bending max.: Thickness x 8
Ageing: No change of magnetic and mechanical properties. Becomes neither hard nor brittle.

All dimensions in mm.
The following standard dimensions are available from stock.

Chemical resistance:
- Air, ozone, water: excellent.
- Mineral oil, weak acids and bases, kerosene, glycol: no effect.
- Nitric acid: light reaction.
- Petrol, acetone, 90% alcohol: some deformation.
- Benzene, chlorinated solvents: destruction.

Rings or discs magnetised parallel to the length can be punched from strips.

An outstanding application can be found in magnetic rails for holding purposes. Here Betaflex strips are placed between 2 flat iron bars (sandwich system). This enables magnetic rails of any length with excellent holding force to be easily manufactured (see bottom left figure).

Example of use
Holding magnet
system
Radial
magnetisation
Magnetic
repulsion
Multi-pole
magnetisation
Block magnets
TypeCxx  Tolerances
BF3253x25x200  Thickness ± 0.15 mm
Width ± 0.25 mm
Length ± 0.5 mm
Orientation and
magnetisation
through thickness
BF5255x25x200 
BF6306x30x200 
BF8308x30x200 
BF8098x9x250 
BF8008x24x500 
Magnetic values Energy
product
(BxH)max
Remanence

Br
Coercivity
(T=20°C)
Relative
remanent
permeability
Temperature
coefficient
of remanence
pro °C
Maximum
operating
temperature
Density Curie
tempe-
rature
      BHC JHC          
  kJ

m3
MGOe mT G kA

m
Oe kA

m
Oe mT

kA/m
  °C g

cm3
°C
Betaflex (BaFe),
anisotropic
plastic bonded
121,52452450175220020726001,40- 0,20%- 40°
+ 85°
3,7450°
ORDER LIST
Prices /pc. ex works Berlin plus packing, VAT only in Germany
(A = Please ask for price)
Catalogue page Type 1 - 19 20 - 49 50 - 99 100 - 199 200 - 499 500 - 1000  
 18  BF325   2.55  2.45  2.30  1.90  1.75  A    Add to shopping cart   
 18  BF525   4.45  3.95  3.50  2.50  2.20  A    Add to shopping cart   
 18  BF630   7.00  6.10  4.35  3.50  3.00  A    Add to shopping cart   
 18  BF830   8.95  7.90  6.10  4.50  4.00  A    Add to shopping cart   
 18  BF809   4.80  4.10  3.45  2.70  2.50  A    Add to shopping cart   
 18  BF800   19.90  16.30  13.25  11.75  9.70  A    Add to shopping cart   
Small orders: Payments from foreign countries result in additional bank charges, therefore we charge an additional lump sum of 15,- Euro for all foreign orders with a goods value less than 153,- Euro.

Please ask for our conditions of sale, delivery and payment in english and our export conditions for your country.