HYDROK
Use and limits of use
36
Order h49 7144.907-333
Brief des-
ignation
Unit
Explanation
𝑀
𝑞
𝑁𝑚
Torque due to lateral force on the chuck
axis
𝑀
𝑞 𝑚𝑎𝑥
𝑁𝑚
Maximum torque due to lateral force on
the chuck axis
𝑚
𝑤
𝑘𝑔
Workpiece mass
𝑚
𝑤 𝑚𝑎𝑥
𝑘𝑔
Maximum workpiece mass
𝑛
𝑚𝑖𝑛
−1
Speed
𝑃
-
Key indicators for machining
𝑟
𝑠
𝑚
Distance between mass center of gravity
of clamping head segment and rotational
axis of the chuck
𝑆
-
Clamping force scatter width factor
𝜇
𝑎
-
Friction coefficient in axial direction
𝜇
𝑡
-
Friction coefficient in radial direction
Table 4:
Nomenclature application limits
The graphic in the sketch below shows the forces and mo-
ments used in the following sample calculations:
𝐹
𝐺
[𝑁] = 𝑚
𝑤
[𝑘𝑔] ∗ 9.81 [
𝑚
𝑠
2
]
5.2.2 First limit [workpiece length]
The maximum unclamping length that can be machined with-
out the aid of a back rest or a tailstock is 6 times the clamping
diameter.
