Sav 245.09, Operating Instructions Manual, Page: 49 / 72

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SAV 245.09 /.10 /.99 3 TECHNICAL SPECIFICATIONS
Where no further details are provided, the rated holding forces stated for our products apply to a test workpiece
made of steel 1.0037, polished, with the dimensions 100 x 100 x 40 mm.
Magnet
Holding force
displacement force
Fig. 1: Holding and displacement forces on magnetic chucks
Definition of pole pitch
To achieve a uniform holding force across the entire chucking area and to also hold small workpieces, magnetic
chucks are manufactured with different pole pitches and pole spacing. The chucking area is consequently designed
with alternating north and south poles. The pole gap consists of a non-magnetic material such as brass or plastic.
N N N S S S
pole gap pole spacing P
Fig. 2: Definition of pole gap and pole spacing for magnetic chucks
3.1.2 Influences on the magnetic holding force
Holding force and workpiece thickness
The magnetic field in the positioned workpiece roughly forms semicircles from one pole to the next.
N N N S S S
workpiece Magnet
Fig. 3: Force line progression for workpiece thickness > pole spacing
N
N
N
S S S
workpiece Magnet
Fig. 4: Force line progression for workpiece thickness < pole spacing