KAISER BORING CUTTING CONDITIONS
CENTRIC BORING BAR TYPE
Recommended Cutting Conditions • This table is a guideline for selecting cutting parameters; adjust them as needed according to the machine and workpiece conditions • If chatter occurs, either lower the cutting speed or use an insert with a smaller nose radius • Internal high pressure coolant may cause deflection of the boring bar holder; lower the pressure when close tolerance is required • Coated cermet T2000Z or T2500F is recommended to reduce wear when machining steel • Dry cutting is recommended for CBN BN2000, BNC200, BNC500 and BN7000 inserts
Projection Length
Max Spindle Speed for Centric Boring Bar Type
JIG BORING CUTTER
Cutting Speed (SFM)
Cutting Depth (in./ø)
Feed f (in./rev)
Workpiece
Model
Max Spindle Speed (RPM)
Head
RBE1
80
.001
RBE1.5 RBE2
20,000 18,000 16,000 14,000 14,000 10,000
EWN04-15E-CK3 EWN2-22E-CK4 EWE2-32-CK5 EWN2-32E-CK5
165
.002
RBE3 RBE4 RBE5 RBE7 RBE9 RBE1
Carbon Steel Alloy Steel
.001
200
.002
EWE2-54CK6
EWN2-54E(M)-CK6
265
.004
The max spindle speeds listed in this table are the speeds allowable for safe use of the boring head only. Note that these values differ depending on the boring bar used, machine rigidity, etc.
100
.001
RBE1.5 RBE2
200
.002
RBE3 RBE4 RBE5 RBE7 RBE9
Aluminum
.001
265
.002
330
.004
CENTRIC BORING BAR TYPE ST05 / ST06 (ø.236"-.354")
Insert
Projection Length
Cutting Speed (SFM)
Cutting Depth (in./ø)
Workpiece
Nose Radius
Grade
.787
330 230 165 100 300 200 130 100 200 130 330 230 165 100 400 330 265 200
.008 .008 .008 .004 .008 .008 .008 .004 .004 .004 .008 .008 .008 .004 .008 .008 .008 .008
1.575 1.969 2.362
Carbon Steel Alloy Steel
T1500A T1200A
.008
.787
1.575 1.969 2.362
T1500A T1200A
Stainless Steel
.008
.787
NB10HA NBX20
Hardened Steel
.008
1.181
.787
1.575 1.969 2.362
Cast Iron
.008
H1
.787
1.575 1.969 2.362
.008
H1
Aluminum
• Red figures are achievable with boring bars made of carbide • Feed Rate Selection information; pg. 500
497
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