MANOK plus
Use and limits of use
38
Order h49 7144.907-333
Contact factor
𝒄
Machining
conditions
Contact form
Interfer-
ence fit
and sad-
dle fit
Edge fit
Smooth clamping head
Dry
1.1
1.0
Wet* / MMS**
1.3
1.2
Clamping head with
longitudinal and trans-
verse grooves
Dry
1.1
1.0
Wet* / MMS**
1.3
1.2
Clamping head with
Z or F serrations
Dry
1.0
1.0
Wet* / MMS**
1.2
1.1
*
Wet machining: Use of cooling lubricant [KSS]
**
MMS [MQL]: Use of minimum-quantity lubrication
Table 8:
Contact factor
Specific cutting forces
These are approximate values, reflecting the relatively arbi-
trary sub-categorization of materials. As a result, relatively
large deviations from real values can be present.
For deviating workpiece materials and/or for machining tasks
in the boundary area of the clamping device, the respective
𝑘
𝑐
values of the workpiece material being machine needs to
be determined precisely, and/or the supplier of the material
needs to be consulted.
The following applies to drilling operations with a double-
bladed tool:
𝑓 =
𝑓
𝑛
2
Workpiece materials
Specific cut-
ting forces
𝒌
𝒄
[
𝑵
𝒎𝒎
𝟐
]
at
𝒇 =
𝟎. 𝟏𝒎𝒎
*
Specific cut-
ting forces
𝒌
𝒄
[
𝑵
𝒎𝒎
𝟐
]
at
𝒇 =
𝟎. 𝟓𝒎𝒎
*
Specific cut-
ting forces
𝒌
𝒄
[
𝑵
𝒎𝒎
𝟐
]
at
𝒇 =
𝟏. 𝟎𝒎𝒎
*
Designation
DIN [ISO]
Cast iron
For example EN-GJL-
250
1980
1260
900
Spherulitic graphite
iron [unhardened]
For example
EN-GJS-400-15
2120
1190
1060
construction steels
without alloys or with
only a low alloy con-
tent [of average
strength] / cementa-
tion steels [unhard-
ened]
For example
S235JR [1.0037]
S275JR [1.0044]
Ck10 [1.1121]
16MnCr5 [1.7131]
18CrNi8[1.5920]
2920
1840
1500
Содержание MANOK
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