TOPlus mini / TOPlus premium pull-back
Use and limits of use
54
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the clamping force diagram [see »Clamping force diagram«
chapter].
When full axial force is exerted on the clamping head chuck
with
𝐹
𝑎𝑥 𝑚𝑎𝑥
= 45𝑘𝑁
, nominal radial
120𝑘𝑁
forces are being
applied to the workpiece.
In the example calculated here, an axial force of at least
𝐹
𝑎𝑥
= 37𝑘𝑁
must be applied, resulting in a radial clamping
force of
𝐹
𝑟𝑎𝑑
= 99𝑘𝑁
.
This satisfies condition
𝐹
𝑟𝑎𝑑
≥ 𝐹
𝑟𝑎𝑑 𝑒𝑟𝑓
.
Machining can then be performed.
The value is close to the limit value. This ensures that the
clamping head chuck is in good condition in terms of the level
of contamination.
It is advisable to conduct a check on radial clamping force
using an appropriate clamping force meter before the ma-
chining operation. The values established must lie within an
appropriate range for the rotational speed [see »Clamping
force diagram« chapter].
5.2.7 Permitted maximum speed
WARNING
Serious injuries caused by breakage of the prod-
uct when using a clamping head that is heavier
than a standard clamping head!
The maximum speed applies to the use of stand-
ard clamping heads.
This speed must be reduced when using heavier
clamping heads.
The data provided in the »General information« chapter are
based on the use of standard clamping heads.
When using special clamping heads that are heavier than
standard clamping heads, the maximum permitted speed
must be reduced proportionally to the weight of the clamping
head.
The maximum weight of standard clamping heads can be
found in the »Fourth limit [forces]« chapter.
For example, size 65 with weight of a special clamping head
𝑚 = 2.5𝑘𝑔
2.2𝑘𝑔
2.5𝑘𝑔
∗ 6000 𝑚𝑖𝑛
−1
= 5280 𝑚𝑖𝑛
−1
When using this special clamping head, the permitted maxi-
mum speed is
5280 𝑚𝑖𝑛
−1
.
