Technical Information
Setup Recommendations
Setup Recommendations for Bar Overhang
WIDIA-CIRCLE ™ cutting tools are the fi nest quality boring, grooving, profi ling,
and threading tools available. For more than 50 years, WIDIA-CIRCLE
has been the industry leader in solving small-diameter hole machining
problems in major manufacturing plants worldwide.
A common problem associated with any cutting
tool is extending the tool beyond its support point.
This condition of excessive overhang can cause
chatter, poor fi nishes, or inadequate tool life.
Toolholder
We recommend a 4:1 ratio (4 times bar diameter) overhang when
using steel shank bars and up to a 10:1 (10 times bar diameter)
overhang when using carbide shank bars. The overhang ratios
are affected by many factors:
shank diameter
(mm) steel shank
ratio 4:1
(mm) carbide shank
ratio 10:1
(mm)
• Depth of cut(s). 4,00mm 16,00mm 40,00mm
• Feed rate(s). 5,00mm 20,00mm 50,00mm
6,00mm 24,00mm 60,00mm
• Type(s) of material(s) being machined.
Recommended conditions may still be unsatisfactory because
of chatter. Chatter can be induced by non-rigid setups or
harmonics from the machine or machining conditions. In many
cases, changing the RPM of the machine can reduce chatter.
D86
8,00mm 32,00mm 80,00mm
10,00mm 40,00mm 100,00mm
12,00mm 48,00mm 120,00mm
16,00mm 64,00mm 160,00mm
20,00mm 80,00mm 200,00mm
25,00mm 100,00mm 250,00mm
32,00mm 128,00mm 320,00mm
widia.com
Overhang