Negative M Class Chipbreakers for Low Carbon and General Steel Turning EFB / EFE
P Steel
· The EFE main breaker for finishing achieves stable chip control over a wide range of feed rates for low carbon steel and general steel. · Item range covers a wide variety of machining applications. · The EFB for low feed finishing increases chip strain and thereby improves chip breaking performance thanks to the variable rake angle in the nose radius.
.075
¢ Application Range
ELU
.060
EFB
B
.045
EFE
.030
EFL
.015
.004
Feed Rate f (IPR) .008 .012 .016 .020
EFE Breaker for Finishing
General purpose to high feed cutting
Performance
Chip Control
Part Material: Pipe material (A36) Insert: CNMG432EFE-AC8025P Cutting Conditions: v c = 656 SFM, f = .0157 IPR, a p = .0079" Dry
Arc-shaped main breaker design achieves stable chip control over a wide range of feed rates
Excellent chip control at low depth of cut, high feed conditions
C
Two-step breaker achieves stable chip control at low feed rates of f =.0039 IPR
Sub breaker for chip control during pro ling
D
.055”
.028”
R
20°
EFE Breaker (AC8025P)
Conventional Tool
Cross Section of Chipbreaker
Application Examples
Application Examples
S
Part Material: 1053 Steel ø.785-3.935" External Diameter/Facing Insert: DNMG433EFE-AC8025P Cutting Conditions: v c =591 SFM, f =.0098 IPR (Corner), .0177IPR (Straight), a p =.0118", Wet
Part Material: Iron plate (1011 Hot Rolled Steel) Facing Insert: CNMG432EFE-AC8025P Cutting Conditions: v c =656 SFM, f =.0059 IPR, a p =.0079-.0197", Wet
Stable chip control even at low depth of cut and variable feed conditions
Breaks chips with a steady curl even in facing of rolled steel
T
100mm
100mm
V
EFE Breaker (AC8025P)
Conventional Tool
EFE Breaker (AC8025P)
Competitor's Product
EFB Breaker for Low Feed Finishing
Low feed cutting
W
Application Examples
Part Material: Pipe material (A36) Internal Diameter Machining Insert: DNMG431EFB-T3000Z Cutting Conditions: v c =1155sfm, f =.0012-.0079 IPR, a p =.0276", Wet
Smooth, high rake breaker joint achieves ultra-low cutting resistance
Small curls of chips even for pipe material, achieving a steady chip length
Variable rake angle in nose radius increases chip strain and improves chip breaking performance
.030”
EFB Chipbreaker (T3000Z)
Competitor's Product
27°
Cross Section of Chipbreaker
B16
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