HSK BALANCE-CUT BORING ARBOR （ RAC ）
For Heavy Duty Boring of Iron and Cast Iron CN Insert （ Negative type ）
Rough Boring －
Heavy Duty Boring
L
φ C1
M
φ C
φ D
Fig.1
h
h 2
L, M
L
φ C
φ C 1
φ C 1
M
φ D
φ C
φ D
RAC
Fig.2
Fig.3
h 2
h
h 1
h
h 2
（ Spacer ）
P.252
Spacer Code No.
Boring Range D
Boring Depth M
Shank Code No.
C C 1
TAPER
Code No.
Weight (kg)
Fig
Tip No.
Head Code No.
HSK 63A-Q20- 80 -Q20-110 -Q20- 80 -Q26- 95 -Q26-140 -Q26- 95 -Q34- 95 -Q34-110 -Q34- 95 -Q42- 95
HSK 63A-RAC43-150 -180 -210 -RAC53-165
97 130 157 135 180 195 180 195 240 195
2.4 2.6 2.9 2.2 3.0 3.0 4.5 4.9 5.9 6.5
1
43 ～ 55
20-RAC 43- 70
40
SP20-20-60̶
2
50
1
HSK63A
53 ～ 70
26-RAC 53- 70
-210 -225 -RAC70-180 -195 -240 -RAC100-195
53
CN08-C̶
SP26-26-60̶
2
70 ～ 100
34-RAC 70- 85
64
52.4
3
SP34-34-60̶
100 ～ 130
42-RAC100-100
83
★ “ C ” grade （ Coated ） inserts are supplied as standard with the head.
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. HSK63A-RAC53-165-C ★ For HSK40A or 50A , modular connection system is applied. Please refer P.267 for Base Holder. ★ When L length is required longer than standard, please specify the boring depth M. ★ Lubrication Pipe is optional. Please refer P.298 P.267 for base holder, P.90 for spacer and
L
M
High Pressure Coolant Through Tool
★ Code No. of RAC25 and RAC32 with CC inserts are changed to RAC25E and RAC32E. Please refer
P.249, P.250
251
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