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KOMET KUB Centron®
Mounting instructions
Length adjustment
dimension of
central drill bit
b
a
max. 0,5
Precentring of starting bores:
It is generally not necessary to precentre starting bores.
Precentring is advisable for unmachined starting
bores such as cast metal or forging skin and tools
with drilling depths > 10×D.
Stationary use
Please note: The drill head must be positioned exactly
central to the axis of ratation of the workpiece.
Max. permissible offset ± 0.05 mm.
Dimensional variation:
x D R0,4
x D R0,8 = x D R0,4 – 2 × A
x D R0,8
A
20
x d
x d
a
b
5
1,0
2,25
6
1,1
2,65
8
1,25
3,38
10
1,25
3,86
12
1,45
4,67
16
1,8
5,78
20
2,5
7,91
A
xD
33,0 – 37,9 0,08
38,0 – 54,9 0,09
55,0 – 64,9 0,10
Please see notes on safety (page 21)!
60
40
25
15
5
1
5
10
15
20
Water (litres/minute)
The coolant is supplied centrally onto the cutting edges through the basic ele-
ment or the drill head by means of ground coolant channels in the central drill
bit and on the drill head face.
It is essential for central coolant supply to be used. The coolant helps produce
the best possible chip formation and chip removal. Coolant pressure should not
be less than the minimum 5 bar. Increasing the coolant pressure to 10–20 bar
improves the boring process.
• Important note: On exit of the drill a disc as shown is ejected. With rotating components
this can cause accidents. Please arrange suitable guarding.
• The technical notes provided in the application details depend on the environmental and
application conditions (such as machine, environmental temperature, lubrication/coolant
used and desired machining results): these are based on proper application conditions, use and
compliance with the spindle speed limits given for the tools.
• To prevent damage to machine and tool, we recommend that the drive power be calculated in
advance. The drive power which is actually available will be found in the machine manufacturer's
spindle speed/performance diagram.
• Safety equipment should be provided to protect personnel from flying chips.
• To ensure the best possible tool life, the insert should be changed promptly.
ENGLISh
Coolant flow / coolant pressure
recommended
coolant pressure
1 up to x 22,9 mm
2 up to x 37,0 mm
3 up to x 69,9 mm
4 from x 70,0 mm
minimum coolant pressure
25
30
35
40
45
Safety Notes
21
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