BALANCE-CUT BORING ARBOR (RAC-K)
Rough Boring−For Through Hole and Multi Sheets
Power of Shoulder Support
L
φ C 1
M
20 °
Perfect Contact
φ C
Cutting Force
φ D
Fig.1
h
h 2
L
20 °
φ C 1
M
φ C
φ D
φ Q
φ Q1
RAC-K
Fig.2
h 2
h
h 1
（ Spacer ）
P.66
Boring Range D
Boring Depth M
Cupling Dia Q
Shank Code No.
Spacer Code No.
Weight (kg)
TAPER
Code No.
C
C 1
Fig
Tip No.
Head Code No.
BT40-Q12- 80 -Q12-110 -Q12- 80 -Q16- 95 -Q16-125 -Q16- 95 -Q20- 80 -Q20-110 -Q20- 80 -Q26- 95 -Q26-140 -Q26- 95 -Q34- 95 -Q34-110 -Q34- 95 -Q42- 95
BT40-RAC 25-135K -165K -180K -RAC 32-150K (IT40)
67 105 112 77 110 122 97 130 157 135 180 195 180 195 240 195
2.0 2.1 2.1 2.4 2.6 2.6 2.7 2.9 3.2 2.5 3.3 3.2 4.8 5.2 6.2 6.8
1 2
25 ～ 32
12-RAC 25- 55K
12
35
24
SP12-12-45
SC09
1
32 ～ 45
16-RAC 32- 55K
16
42
31
-180K -195K
SP16-16-45
2
-RAC 43-150K
1
43 ～ 55
20-RAC 43- 70K
20
40
-180K -210K
No.40
2
SP20-20-60
50
-RAC 53-165K
1
53 ～ 70
26-RAC 53- 70K
26
50
-210K -225K
SC12
2
SP26-26-60̶̶̶̶
-RAC 70-180K
1
70 ～ 100
34-RAC 70- 85K
-195K -240K
34
64
64
2 1
SP34-34-60̶̶
100 ～ 130
42-RAC100-100K
42
83
62
-RAC100-195K
★ “C” grade (Coated) inserts are supplied as standard with the head.
P.66 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-RAC53-165K-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
High Pressure Coolant Through Tool
65
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