SPANNTOP [nova] – Safety
Chuck size
Maximum chuck length
[mm]
Fq max / [N]
32
< 120
2.200
42
< 125
4.200
52
< 125
4.200
65
< 140
6.000
80
< 140
7.200
100
< 160
9.000
125
< 200
13.000
140
< 200
13.800
160
< 200
15.000
Table 9: Maximum permissible transverse force
With extended chuck length, the maximum permissi-
ble cutting force must be reduced in the ratio of the
feed lengths, e.g. size 32, L=150mm
120mm
150mm
∗
2200N
=
1760N
2.10.5.5 For principle 5: Mq ≤ Mq max
For drilling tasks radial to the workpiece axis, the
transverse force verified under principle 4 generates
an additional torque Mq on the clamping head or on
the chuck. This moment as well must not limitlessly
increase without the chuck being damaged, although
perhaps the clamping set-up would nonetheless still
securely clamp the workpiece. Again, the table below
shows the permissible maximum values.
Occurring torque Mq through introduction of the trans-
verse force Fq
Mq
=
Fq
∗
Lq
33
