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 Example of 2 Stepped Balance Cut
Please use RAC-K for through hole boring. P.65, P.66
Approx. double removal of below cutting condition is possible by -0.3 Cartridge. P.68
0.3mm
P.62
Boring Range D
Boring Depth M
Cupling Dia Q
Shank Code No.
Spacer Code No.
Weight (kg)
TAPER Code No.
Fig
C
C 1
Tip No.
Head Code No.
97 130 142 157 117 182 177 205 235 265 225 290 325
5.7 5.8 6.1 6.2 6.9 7.0 7.6 9.5 9.9
BT50-RAC 43-180
BT50-Q20-110 -Q20-125
1
(IT50)
-240 -195 -225
43 ～ 55
20-RAC 43- 70
20
40
60
SP20-20-45 SP20-20-60
2
-Q20-110
-RAC 53-210 -240
-Q26-140 -Q26-170N -Q26-140 -Q34-170 -Q34-200 -Q34-170 -Q42-125 -Q42-190 -Q42-225A
1
53 ～ 70
26-RAC 53- 70
26
50
65
No.50
CN08-C
-270
2
SP26-26-60̶̶
-315 -RAC100-225 -RAC 70-255 -285
1
70 ～ 100
34
64
80
34-RAC 70- 85
10.9 12.5 15.2 16.5
2
SP34-34-60̶̶
1 2
100 ～ 130
42-RAC100-100
-290 -325
42
83
83
★ “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.59, P.60
P.62 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. BT50-RAC53-210-C ★ BT50-RAC100-375, 425 and 475 are also available. P.89 for base holder, P.90 for spacer and
Insert tip for RAC for Heavy Duty Boring Steel Stainless Steel Cast Iron Aluminium Material
● ● ●
Please add the grade indication into ○ , and add the insert tip material indication at the end off the Code No. e.g. CC08-C8 (AC630M)
Coated Carbide M
C
Code No. Nose R Material Grade
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.
62
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