WIDIA - soustružení | KL-TECH s.r.o. | www.klte.cz widia-soustruženi | Page 122

WIDIA ™ VariTurn ™
Stainless Steel • Austenitic Stainless Steels
„ 
Step 1 • Select the insert geometry
Negative Inserts
Positive Inserts
1P
Finishing
2P
Finishing
feed rate (mm/rev)
feed rate (mm/rev)
4P
Medium
feed rate (in/rev)
feed rate (in/rev)
6P
Roughing
„ 
Step 2 • Select the grade
Negative Insert
Geometry
Positive Insert
Geometry
2P 4P 6P 1P
heavily interrupted cut TN15M/TN10 TN30M TN30M TN30M/TN10
lightly interrupted cut
cutting condition
TN15M/TN10 TN30M TN30M TN30M
varying depth of cut,
casting, or forging skin TN15M TN15M/TN30M TN15M/TN30M TN15M/TN30M
smooth cut, pre-turned surface TN15M TN15M TN15M TN15M
„ 
Step 3 • Selecting the cutting speed
speed — m/min
Material
Group
M1
grade
90
135
180
225
270
M2
M3
B114
405
450
m/min
162
TN30M 135
TN10U 194
TN15U 129
speed — m/min
grade
90
135
180
225
270
315
360
405
Starting Conditions
450
m/min
TN15M 149
TN30M 135
TN10U 180
TN15U 120
Austenitic Stainless Steel: Duplex
(Ferritic and Austenitic Mixture)
Material
Group
360
TN15M
Austenitic Stainless Steel
Material
Group
315
Starting Conditions
grade
speed — m/min
90
135
180
225
270
315
360
405
Starting Conditions
450
m/min
TN15M 135
TN30M 108
TN10U 167
TN15U 111
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Austenitic Stainless Steel