Pole Extensions

Through the use of pole extensions, any unevenness on the workpiece can be compensated for and a deformation of the workpiece can be prevented.

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Type

Technical data

Model	Pole size	Dimensions [mm]	Version
PVF 50	50	50 x 50 x 15	permanent
PVF 50	50	Ø 50 x 32	permanent
PVB 50	50	50 x 50 x 28-34	flexible
PVF 75	75	70 x 70 x 48	permanent
PVB 75	75	70 x 70 x 43-53	flexible

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Pole extensions are the perfect complement to the square pole magnetic clamping plates and modules. Workpieces with any structure can be perfectly clamped with Assfalg pole extensions. The pole extensions adjust optimally to the shape of the workpiece. The workpiece is underpinned and is located safely on the extensions,, for a five-side complete processing free of vibration and warping. The surface of the magnetic clamping plate is additionally protected against accidental damage through, for example, deep drilling. Another possible application is use as a stop for 3D forms, round material and smaller workpieces.

Other pole extension or pole placement plates are available on request.

Data sheet

The permanent magnet system is moved inside when it is switched on and off, e.g. by operating a lever. It consists of a pole plate and a magnet body. When switched off, the pole plate is not exactly congruent with the magnet body, which leads to a magnetic short circuit (Figure 1). When switched on, the pole plate is congruent with the magnet body and the magnetic circuit can only be closed via the workpiece (see Figure 2).

Features:

Permanent magnets work without electricity, are mobile and reliable.
The size and adhesive force of a magnet system are limited by the internal mechanical friction.
A permanent magnet can be demagnetized by strong external magnetic fields or a temperature of more than 80°C.

Minimizing setup times by quick and easy clamping
Increased tool life by low-vibration clamping
5-sided machining

All Assfalg electro-permanent magnetic chucks are equipped with a maximum of poles in the relationship to the size of the chuck.

If you review a price comparison, it is important for you, to analyze the clamping force of the chuck, because not the size of the chuck is important for the clamping force but the numbers of the poles are crucial for the clamping force of the magnetic chuck. It can mean that you will have bigger price differences by the same size of the magnetic chucks.

Do you have any questions? We will be happy to advise you individually.

You have already informed yourself about magnetic clamping, but for you are the advantages of the different Electropermanent Square Pole Chucks not yet understandable? Before you decide for a Electropermanent Magnetic Chuck, represented on the market, please ask you the following questions:

Which chuck is for your individual application advantageous?
Which special technical characteristics have the different electropermanent magnetic chucks?
Which material do you work?
Which thickness have your work pieces and how big are they?
How often is the processing of workpieces?

The electropermanent magnetic chuck from Assfalg Magnaslot is ideally suited for clamping of small and big work pieces for milling operations. Pole extensions, easily fixed on the surface of the magnetic chucks, guaranted a clamping without distortion even for uneven work pieces. The full steel body, patented and only available by Assfalg-magnets, offers an ideal protection against external influences like hot chips and coolant. If you work very big work pieces, you will get optionally a 4 channel controller, making a simultaneous switching of max. 4 magnetic chucks.

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