Precautions when Using Wiper Inserts
Effects of the wiper insert
Wiper inserts are effective for external/internal diameter machining and for facing as shown in the figure below, surface roughness of the machined surface can be maintained even in high-feed machining. ■ Machined Surface Roughness (actual measurements) ■ Effective Range of Wiper Inserts
Cutting Conditions: CNMG120408, v c =200m/min, a p =1.0mm, SCM435
Corners (ineffective) External Diameter (effective)
25
Wiper Insert (ESEW Type) Ordinary ISO Insert
20
Taper (ineffective)
Improved surface roughness
15
Face (effective)
B
Internal diameter (effective)
10
5
* Note that wiper inserts leave the same machined surface roughness as normal inserts at tapers and corners. * The cutting edge position may need to be offset depending on the insert shape. See the offset table below.
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
Feed Rate f (mm/rev)
Coated Carbide / Coated Cermet / Cermet
CNMG/WNMG/CCMT/CPMT Type ELUW / EGUW / ESEW Type Chipbreaker (ELUW Type chipbreaker only for CCMT / CPMT)
· Use a holder with a cutting edge angle of 95°. · No tool compensation required.
Cutting edge angle 95°
Cutting edge angle 75°
CNMG / WNMG / CCMT / CPMT type wiper inserts comply with the ISO standard, allowing use without correcting the machining program. · The obtuse (100°) corner on the CNMG type can also provide a wiper effect.
C
When using acute angle side (80°)
When using obtuse angle side (100°)
DNMX Type ESEW Type Chipbreaker
Cutting edge angle 93°
· U se a holder with a cutting edge angle of 93°. · Tool compensation required.
D
DNMX Type Tool Program Correction Guide ( → B135)
DNMX type wiper inserts do not comply with the ISO standard. Correct the machining program (tool offset) as explained on the next page (B135).
R
TPGX Type SDW Type Chipbreaker
· Use a boring bar with a 93° cutting edge angle. · Tool compensation required. TPGX type wiper inserts do not comply with the ISO standard. Correct the cutting edge position (tool offset) as explained on the right.
Cutting Edge Position Correction for TPGX Type Breaker (SDW)
S
Internal boring
Nose Radius X direction Z direction R0.4 0.12 -0.02 R0.8 0.12 -0.02
Cutting edge angle 93°
T
Z axis (+)
Note: Unlike the other profiles, the TPGX type is only effective for boring.
CBN (SUMIBORON / Coated SUMIBORON)
V
CNGA Type / CCGW Type / WNGA Type WG/WH Type Chipbreaker
· Use a holder with a cutting edge angle of 95°. · Tool compensation required. CNGA, CCGW and WNGA type wiper inserts do not comply with the ISO standard. Correct the cutting edge position (tool offset) as explained on the right.
External Turning Cutting Edge Position Correction for CNGA/CCGW/WNGA Type Breaker (WG/WH Type) Nose Radius Type X direction Z direction
Cutting edge angle 95°
W
WG Type -0.02 -0.02 WH Type -0.06 -0.06 WG Type -0.01 -0.01 WH Type -0.06 -0.06
R0.4
R0.8/R1.2
Z axis (+)
DNGA Type / DCGW Type WG/WH Type Chipbreaker
· Use a holder with a cutting edge angle of 93°. · Tool compensation required. DNGA and DCGW type wiper inserts do not
Cutting Edge Position Correction for DNGA/DCGW Type Breaker (WG/WH Type)
Cutting edge angle 93°
Nose Radius Type X direction Z direction
External Turning
WG Type -0.17 -0.01 WH Type -0.70 -0.06 WG Type -0.05 0 WH Type -0.58 -0.05
comply with the ISO standard. Correct the cutting edge position (tool offset) as explained on the right.
R0.4
R0.8
Z axis (+)
DNGA Type/DCGW Type
Note: Unlike other contour shapes, the DNGA / DCGW Type can only obtain the wiper effect with outer diameter and inner diameter cutting techniques, and cannot be used for edge cutting.
B134
Dimensions in mm
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