Influences On The Magnetic Holding Force - Sav 243.01 Operating Instructions Manual

SAV 243.01 /.07 /.10 /.11
SAV 220.30 /.31 /.32
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.
S N
Fig. 3: Force line progression for workpiece thickness > pole spacing
S
N
Fig. 4: Force line progression for workpiece thickness < pole spacing
If the workpiece is significantly thinner than the pole spacing, the workpiece does not fully absorb the magnetic
field. This reduces the holding force. The best holding forces are achieved if all force lines run within the workpiece.
A guide value can be that the holding force is not reduced if the workpiece thickness is > 40 % of the true pole pitch.
For thicker and blank workpieces, larger pole spacings can achieve greater penetration of the magnetic field and
therefore a greater holding force for these parts.
The minimum workpiece thicknesses must be observed (see section 3 "Technical specifications").
Workpiece thickness behaviour of permanent
grinding magnets
SAV 220.30 / 243.01 / 243.07
100
75
50
25
0
0 1
3 TECHNICAL SPECIFICATIONS
workpiece Magnet
S S
N N
workpiece Magnet
S N S
N
transverse pole pitch 1.9 mm
2 3 4
workpiece thickness in mm
5 6 7
[ ]
40
PERM
P = 1.9
P = 1.9
P = 1.9
8 9
Version 1.0