BALANCE-CUT BORING ARBOR
L
Boring for Roughing
φ C 1
Power of Shoulder Support
M
φ C
Perfect Contact
φ D
Cutting Force
h
h 2
L
φ C 1
M
φ C
φ
D
φ Q
φ Q 1
RAC
h
h 1
h 2
( Spacer )
P.62
25 ～ 32 32 ～ 45 43 ～ 55 53 ～ 70 70 ～ 100 100 ～ 130 25 ～ 32 32 ～ 45 43 ～ 55 53 ～ 70 70 ～ 100 100 ～ 130 Boring Range D
Cupling Dia Q
Boring Depth M
Code No.
Weight （ kg ）
C 1 C
TAPER
12-RAC 25- 55E 16-RAC 32- 55E 20-RAC 43- 70E 26-RAC 53- 70E 34-RAC 70- 85E 42-RAC100-100E 12-RAC 25- 55E 16-RAC 32- 55E 20-RAC 43- 70E 26-RAC 53- 70E 34-RAC 70- 85E 42-RAC100-100E Q- Min.D -h 2 Head No.
Tip No.
Min.D -L NBTNo. -
NBT40-RAC 25-135E, 165E, 180E -RAC 32-150E, 180E, 195E -RAC 43-150E, 180E, 210E -RAC 53-165E, 210E, 225E -RAC 70-180E, 195E, 240E -RAC100-195E NBT50-RAC 25-150E, 180E, 195E -RAC 32-180E, 210E, 225E (NIT40) (NIT50)
CC07-C CC08-C
12 16 20 26 34 42 12 16 20 26 34 42
24 31 40 50 64 83 24 31 40 50 64 83
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
67, 105, 112 77, 110, 122 97, 130, 157 135, 180, 195 180, 195, 240 195
35 42
No.40
50
CC12-C
64 62 44 50 60 65 80 83
CC07-C CC08-C
4.7, 4.9, 4.8 5.4, 5.6, 5.6 5.7, 5.8, 6.1, 6.2 6.9, 7.0, 7.6 9.5, 9.9, 10.9 12.5, 15.2, 16.5
67, 105, 112 77, 110, 122 97, 130, 142, 157
-RAC 43-180E, 195E, 225E, 240E -RAC 53-210E, 240E, 270E -RAC 70-255E, 285E, 315E -RAC100-225E, 290E, 325E ＊
No.50
117, 182, 177 205, 235,265 225, 290, 325
CC12-C
★ “ C ” grade （ Coated ） inserts are supplied as standard with the head.
P.62 Please refer
P.106 for cutting condition.
L
★ Please refer P.67 for head. ★ For centre through coolant type, please add “ -C ” at the end of Code No. e.g. NBT40-RAC53-165-C ★ Cartridges & Insert tips for the Heavy Duty Boring of Iron and Cast Iron （ No letter ） , for Aluminum （ A ） , and for Through Hole & Multiple Sheets （ K ） are available. Please refer P.68 for cartridges. Please add the letter “ No letter ” , “ A ” or “ K ” at the end of Code No. e.g. NBT40-RAC53-165A ★ ＊ ： NBT50-RAC100-375E, 425E and 475E are also available. Code No. of RAC25 and RAC32 with CC inserts are changed to RAC25E and RAC32E . Please refer P.59, P.60 ★ When L length is required longer than standard, please specify the boring depth M and Q No. P.195 for base holder, P.90 for spacer and
M
BASE HOLDER for MODULAR TYPE MAJOR DREAM HOLDER JAPAN PAT.
L
L
H
φ C φ Q
φ C 1
φ C φ Q
MDQ Photo shows with A1 spacer and ZMAC -V head.
φ C 1
Fig.1
Fig.2
Weight （ kg ）
Code No.
Q L
C C 1
H
TAPER
ZMAC-V Boring Range
Fig
No.30 No.40 No.50
16 ～ 70 16 ～ 70 16 ～ 70 16 ～ 85 16 ～ 180
NBT30-MDQ26- 60 NBT40 -MDQ26- 65 NBT50-MDQ26- 80 (NIT40)
26 26 26 34 42
60 65 80 90 100
50 50 50 64 83
50 54 87 87 87
37.5 30.0 22.0 32.0 45.0
- 1.3 4.6 4.9 5.7
1 2
(NIT50)
-MDQ34- 90 -MDQ42-100
2
★ All base holders are used for centre through coolant. ★ Coupling bolt and wrench are supplied as standard. ★ ZMAC -V head is recommended to use with the MAJOR DREAM base holder for anti-vibration. ★ When L length is required longer than standard, please specify the boring depth M and Q No.
L
M
Q No.
193
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