Sav 244.01, Operating Instructions Manual

Page: 40 / 56

Version 1.0
[
40
]
SAV 244 .01 / .03 / .06 /
.07 / .10 / .11
3. TECHNICAL SPECIFICATIONS
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
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”).
SAV 244.06 radial pole pitch
0 250 500 750 1000 1250 1500 1750 2000 2250 2500
30
25
20
15
10
5
0
ø 100
ø 200
ø 400
ø 500
ø 130 / 150
ø 250 / 300
diameter of workpiece in mm
w
or
kp
ie
ce t
hi
ck
ne
ss i
n m
m