B-Top
Use and limits of use
Order h49 7144.907-333
29
Brief de-
signation
Unit
Explanation
𝑛
𝑚𝑖𝑛
−1
Speed
𝑟
𝑜
𝑚
Center of gravity spacing of jaw
Cen-
ter of gravity spacing of jaw
𝑟
𝑠
𝑚
Center of gravity radius
𝑟
𝑠𝐴𝐵
𝑚
Center of gravity spacing between top
jaw and center of chuck
𝑟
𝑠𝐺𝐵
𝑚
Center of gravity spacing between base
jaw and center of chuck
𝑆
𝑠𝑝
-
Clamping force safety factor
𝑆
𝑧
-
Machining safety factor
Σ
𝑠
𝑁
Maximum clamping force of the chuck
Table 3:
Nomenclature
5.2.2 Calculation of jaw centrifugal forces
𝐷
Clamping diameter
𝑟
𝑜
Center of gravity spacing
of jaw
𝑟
𝑠𝐴𝐵
Center of gravity spacing
between top jaw and
center of chuck
𝑆
Jaw
𝐹
𝑐
= [𝑀
𝑐𝐺𝐵
+ 𝑀
𝑐𝐴𝐵
] ∗ (
𝜋 ∗ 𝑛
30
)
2
𝑀
𝑐𝐺𝐵
= 𝑚
𝐺𝐵
∗ 𝑖 ∗ 𝑟
𝑠𝐺𝐵
𝑀
𝑐𝐴𝐵
= 𝑚
𝐴𝐵
∗ 𝑖 ∗ 𝑟
𝑠𝐴𝐵
𝐹
𝑐
= [(𝑚
𝐺𝐵
∗ 𝑖 ∗ 𝑟
𝑠𝐺𝐵
) + (𝑚
𝐴𝐵
∗ 𝑖 ∗ 𝑟
𝑠𝐴𝐵
)] ∗ (
𝜋 ∗ 𝑛
30
)
2
