Общий каталог Tungaloy 2020 - 2021 - страница 199

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- GNGA type CBN

B

C

80° 70° D

E

For high efficiency in finishing hardened steel,

cast iron and sintered metals F

Chip control in face turning

Continuous cuttingInterrupted cuttingG
Chips jam
in the clearance
H
GNGA typeCNGA typeGNGA typeCNGA type
Corner angle: 70°Corner angle: 80°Corner angle: 70°Corner angle: 80°I
Since GNGA type inserts have enough spaceToolholder: ACLNL2525M12-A
for chip flow, chip packing doesn’t occur,Insert: 2QP-GNGA120408 BXM20
2QP-CNGA120408 BXM20
improving surface finish and preventingWorkpiece material : SCM420 / 18CrMo4 (60HRC)
sudden chipping on cutting edge.Cutting speed: Vc = 150 m/min
Existing standard toolholders for CNGA1204FeedJ : f = 0.10 mm/rev
can be used.Depth of cut: ap = 0.125 mm
Machining: Face turning
CUTTING PERFORMANCECoolant: Dry
Cutting force
(Thrust force)GNGA typeK CNGA type
Corner angle: 70°Corner angle: 80°
400400
Average: 128 (N)Average: 142 (N)
200200L
00

10 20 30 10 20 30

ContinuousInterruptedContinuousInterrupted
-200-200
Time (sec)Time (sec)
ToolholderM : ACLNL2525M12-A
GNGA type has large clearance andInsert: 2QP-GNGA120408 BXM20
reduces cutting force compared to2QP-CNGA120408 BXM20
the regular CNGA type.Workpiece material : SCM420 / 18CrMo4 (59HRC)
Cutting speed: Vc = 150 m/min
Feed: f = 0.15 mm/rev
Depth of cut: ap = 0.125 mm
Machining: Face turning
CoolantTungaloy B167 : Dry