HSK BALANCE-CUT BORING ARBOR （ RAC ）
Balance cut boring bar executes boring in 2 cartridge inserts absorbing the vibration each other. The faster the feed rate, the better swarf ejection. This is ideal for rough and medium boring.
Double Cutting Capability
Please use RAC-K for through hole boring. P.255, P.256
Example of 2 Stepped Balance Cut
Approx. double removal of below cutting condition is possible by -0.3 Cartridge. P.68
0.3mm
P.252
Boring Range D
Boring Depth M
Spacer Code No.̶
Shank Code No.
Weight (kg)
TAPER
Code No.
C
C 1
Fig
Tip No.
Head Code No.
HSK100A-Q20-110 -Q20-125 -Q20-110 -Q20-110 -Q26-140 -Q26-170N
HSK100A-RAC 43-180 -195 225 -240 -RAC 53-210
97 130 142 157 117 182 177 202 232 262 225 290 315
4.9 5.0 5.3 5.4 6.1 6.2 6.8 8.7 9.1
1
43 ～ 55
20-RAC 43- 70
60
40
SP20-20-45 SP20-20-60̶
2
1
53 ～ 70
26-RAC 53- 70
-240 -270 -RAC 70-255 -285 -315 -RAC100-225
65
53
HSK100A
CN08-C
-Q26-140 -Q34-170 -Q34-200 -Q34-170 -Q42-125 -Q42-190 -Q42-125
SP26-26-60̶
2
1
70 ～ 100
34-RAC 70- 85
80
64
SP34-34-60̶
10.1 11.7 11.7 15.1
2
1
100 ～ 130
42-RAC100-100
-290 -315
83
83
SP42-42-90
2
★ “ C ” grade （ Coated ） inserts are supplied as standard with the head.
★ Code No. of RAC25 and RAC32 with CC inserts are changed to RAC25E and RAC32E. Please refer P.249, P.250
P.252 Please refer
P.106 for cutting condition.
★ Please refer P.67 for head. ★ For centre through coolant type, please add “ -C ” at the end of Code No. e.g. HSK100A-RAC53-210-C ★ For HSK40A or 50A , modular connection system is applied. Please refer P.267 for Base Holder. ★ HSK100A-RAC100-375, 425 and 475 are also available. ★ Lubrication Pipe is optional. Please refer P.298 P.267 for base holder, P.90 for spacer and
Insert tip for RAC for Heavy Duty Boring
● ● ●
Steel Stainless Steel Cast Iron Aluminium
Please add the grade indication into ○ , and add the insert tip material indication
Material
at the end off the Code No. e.g. CC08-C8 （ AC630M ）
Coated Carbide M
Code No. Nose R Material Grade
C
AC630M
Dimension
Applicable Arbor
4.76 0 °
CN08- ○ 8 0.8
●
RAC43 - RAC530
φ 5.16
12.7
（ CNMM120408 ）
12.9
★ Minimum order quantity : 10pcs. ★ When CN08 insert （ CN ○○ 1204 ○○ ） in the market is used, please use the eccentric bolt type cartridge （ S.RCC- ○○ Q ） P.102. Nikken CN08- ○ 8 insert can be used on the eccentric bolt type cartridge.
252
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