Sandvik Coromant Silent tools - users guide - Manual (Page 7)

7
8 x dm
m
8 x dm
m
5 10
3 7
Dampened bars for higher productivity
Use a dampened steel bar or a dampened carbide bar
to:
• Achieve higher productivity at less than maximum bar
overhangs.
• Improve the hole tolerance and surface finish.
• Reduce the number of passes.
Overhang Bar material
a
p
, mm/rev
f
n
, mm/rev
Bore
length,
mm N.O.P*
Cutting
time, min
Dampened
steel
Dampened
carbide rein-
forced
*Number of passes
Example
The table below shows an example of how the higher
static stiffness of a carbide boring bar makes it possi-
ble to:
• Take larger depth of cut.
• Increase the feed.
• Reduce the number of passes.
• Reduce the cutting time.
300
300
1.5
0.15
2.5
0.25