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Use and limits of use
34
Order h49 7144.907-333
5.2.6 Sample calculation
Permitted speed for a given effective clamping force
The following data are known from the previous calculation:
Initial clamping force while stationary
𝐹
𝑠𝑝0
= 17723𝑁
Machining force for the machining task
𝐹
𝑠𝑝𝑧
= 3000𝑁
[application-specific]
Total centrifugal force of all jaws
∑𝑀
𝑐
= 2.668𝑘𝑔𝑚
Safety factor
𝑆
𝑧
= 1.5
[in accordance with VDI 3106]
Safety factor
𝑆
𝑠𝑝
= 1.5
[in accordance with VDI 3106]
INFORMATION
No account is taken of the masses of the jaw chuck
fixing screws and slot nuts.
The permitted speed is sought:
𝑛
𝑧𝑢𝑙
=
30
𝜋
∗ √(
𝐹
𝑠𝑝0
+(𝐹
𝑠𝑝𝑧
∗𝑆
𝑧
)
∑ 𝑀
𝑐
) =
30
𝜋
∗ √(
69947+(3000∗1.5)
2668
)
𝑛
𝑧𝑢𝑙
= 1495𝑚𝑖𝑛
−1
The calculated speed
𝑛
𝑧𝑢𝑙
= 1495𝑚𝑖𝑛
−1
is less than the
maximum permitted speed of the chuck
𝑛
𝑚𝑎𝑥
= 3200𝑚𝑖𝑛
−1
[see »General information« chapter].
This calculated speed can be used.
