BALANCE-CUT BORING ARBOR (RAC)
For Heavy Duty Boring of Iron and Cast Iron CN Insert (Negative type)
Rough Boring−
Power of Shoulder Support
L
Heavy Duty Boring
φ C 1
Perfect Contact
M
φ C
Cutting Force
φ D
Fig.1
h
h 2
L
φ C 1
M
φ C
φ D
φ Q
φ Q 1
RAC
Fig.2
h
h 1
h 2
(Spacer)
P.62
Cupling Dia Q
Boring Range D
Boring Depth M
Shank Code No.
Spacer Code No.
Weight (kg)
TAPER Code No.
C
C 1
Fig
Tip No.
Head Code No.
BT40-Q20- 80 -Q20-110 -Q20- 80 -Q26- 95 -Q26-140 -Q26- 95 -Q34- 95 -Q34-110 -Q34- 95 -Q42- 95
97 130 157 135 180 195 180 195 240 195
2.7 2.9 3.2 2.5 3.3 3.2 4.8 5.2 6.2 6.8
BT40-RAC 43-150
1
43 ～ 55
20-RAC 43- 70
20
40
(IT40)
-180 -210
2
SP20-20-60
50
-RAC 53-165
1
53 ～ 70
26-RAC 53- 70
26
50
-210 -225
No.40
CN08-C
2
SP26-26-60̶̶
-RAC 70-180
1
70 ～ 100
34-RAC 70- 85
-195 -240
64
34
64
2 1
SP34-34-60̶̶
100 ～ 130
42-RAC100-100
42
83
62
-RAC100-195
★ “C” grade (Coated) inserts are supplied as standard with the head.
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. BT40-RAC53-165-C ★ When L length is required longer than standard, please specify the boring depth M. P.89 for base holder, P.90 for spacer and
L
M
★ Code No. of RAC25 and RAC32 with CC inserts are changed to RAC25E and RAC32E. Please refer
P.59, P.60
High Pressure Coolant Through Tool
61
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