HYDROK
Use and limits of use
46
Order h49 7144.907-333
whereby, although based upon components
𝐹
𝑠𝑧
= 0
and
𝐹
𝑓𝑧
= 0
, a simplified form [just transverse force] can be used:
𝐹
𝑟𝑎𝑑 𝑒𝑟𝑓
= 𝑆 ∗ 𝑐 ∗ 1.6 ∗ 𝐹
𝑠𝑘
Determining of
𝐹
𝑠𝑘
can be calculated as follows for
drilling operations performed radially in relation to the
clamping device axis, in a similar way to Formula III:
𝐹
𝑠𝑘
=
(0.27∗
𝐿𝑧
𝑑𝑠𝑝
+0.63)∗(𝐹
𝑞
∗𝐿
𝑧
+𝐹
𝐺
∗𝐿
𝑔
)
0.5∗(0.67∗(1.9∗𝐿
𝑠𝑝
−4.5𝑚𝑚)+𝜇
𝑎
∗𝑑
𝑠𝑝
)
To calculate
𝐹
𝑞
, see the »Further to Principle 4:
𝐹
𝑞
≤
𝐹
𝑞 𝑚𝑎𝑥
« chapter.
𝐹
𝑞
= 𝐹
𝐵
= 0.45 ∗ 𝐷
𝐵
∗ 𝑓
𝑛
∗ 𝑘
𝑐
5.2.5.2 Further to Principle 2:
𝑭
𝒕
≤ 𝑭
𝒕 𝒎𝒂𝒙
When using a tailstock, due to the additional expanding force
exerted on the clamping head chuck, the permitted maxi-
mum tailstock force is limited to the following values in ac-
cordance with the size of the clamping head chuck:
Size of the clamping head
chuck
𝑭
𝒕 𝒎𝒂𝒙
[𝒌𝑵]
26
2
40
4
52
6
65
8
80
8
100
8
125
8
Table 12: Maximum permitted tailstock force
NOTE
Serious damage to materials on clamping equip-
ment and machine tool due to non-adapted forces!
The total of set tailstock force and axial clamping
force during the clamping process must be ex-
ceeded by the release force.
When operating with a tailstock, using an end-stop in the
clamping head chuck ensures that the workpiece is not dis-
placed axially.
5.2.5.3 Further to Principle 3:
𝑭
𝒄
≤ 𝑭
𝒄 𝒎𝒂𝒙
The cutting force for turning operations can achieve very
high levels, especially if the workpiece does not protrude far,
although machining involves no slip or leverage forces that
