HYDROK
Use and limits of use
44
Order h49 7144.907-333
Workpiece surface
Clamping surface
Smooth
clamping head
Clamping head
with longitudi-
nal and trans-
verse serra-
tions
Clamping head
with Z serra-
tions
Clamping head
with F serra-
tions
Finished, ground
𝜇
𝑡
= 0.06
𝜇
𝑎
= 0.08
𝜇
𝑡
= 0.07
𝜇
𝑎
= 0.09
𝜇
𝑡
= 0.15
𝜇
𝑎
= 0.20
𝜇
𝑡
= 0.17
𝜇
𝑎
= 0.22
Finished to roughed
𝜇
𝑡
= 0.10
𝜇
𝑎
= 0.13
𝜇
𝑡
= 0.11
𝜇
𝑎
= 0.15
𝜇
𝑡
= 0.18
𝜇
𝑎
= 0.25
𝜇
𝑡
= 0.23
𝜇
𝑎
= 0.28
Blank or unma-
chined
𝜇
𝑡
= 0.14
𝜇
𝑎
= 0.16
𝜇
𝑡
= 0.16
𝜇
𝑎
= 0.18
𝜇
𝑡
= 0.20
𝜇
𝑎
= 0.28
𝜇
𝑡
= 0.25
𝜇
𝑎
= 0.30
Material correction
values
Aluminum alloys
= 0.97
Brass
= 0.92
Cast iron
= 0.80
WS Workpiece
SP Clamping element
Table 10: Friction coefficient for steel workpieces
Clamping head mass
𝒎[𝒌𝒈]
and distance of mass center
of gravity of clamping head segments to the rotational
axis
𝒓
𝒔
[𝒎]
Size of clamping
head
Distance to mass
center of gravity
𝒓
𝒔
[𝒎]
in smallest
position
Clamping head
mass
𝒎[𝒌𝒈]
32
0.015
0.5
5
42
0.021
0
.
7
0
52
0.022
1.0
0
65
0.027
2.
20
80
0.032
2.
7
0
100
0.045
3.
60
125
0.061
9
.
1
0
