RAC BALANCE-CUT BORING ARBOR CUTTING DATA
CC (Positive type) RAC-E
Material
Steel
60 ～ 150m/mim. (Dry or Wet cutting)
CN (Negative type) RAC
Stainless Steel
40 ～ 80m/mim. (Wet cutting)
60 ～ 150m/mim. (Dry or Wet cutting)
Cast Iron
RAC-A
Aluminium, Non-ferrous metal
200 ～ 500m/mim. (Wet cutting)
RAC-K
Multiple Sheets, Through Hole
40 ～ 120m/mim. (Dry or Wet cutting)
Recommended cutting Speed ◎ … Best ○… Good －… Unsuitable
Insert
Interrupted Cutting
FC,FCD
SS41̶̶̶
S55C
SCM SKD̶̶
SC
SUS
AL,ALC̶̶̶
Code No.
Grade
Coated Carbide M Coated Carbide K Coated Carbide M
○ 60 ～ 150 60 ～ 150 ○ 60 ～ 150
○ 50 ～ 80 ○ 80 ～ 120 80 ～ 120
○
60 ～ 120
60 ～ 150
50 ～ 80
60 ～ 150
40 ～ 80
CC
○ 40 ～ 80̶̶̶
○ 60 ～ 120
○ 60 ～ 150
○ 60 ～ 150
○ 50 ～ 80
○̶
CN
○
AEG
K10
400 ～ 800
Coated Carbide M Coated Carbide K
○ 60 ～ 150
○ 80 ～ 120
○̶
60 ～ 120̶̶̶
60 ～ 150̶̶̶
50 ～ 80
60 ～ 150̶̶̶
40 ～ 80
SC
60 ～ 150̶̶
80 ～ 120
★ The cutting speed is recommended to be reduced to 50% for the interrupted cutting. ★ When L/D is longer, the insert tip with small Nose R is recommended. ★ When L/D is longer, the feed rate at the entrance is recommended to be reduced to 60 to 70%.
Recommended Cutting Condition (removal,feed) These figures are based on the application of L/D=3 ～ 3.5 times on cast iron.
Relation between Boring Dia. & MAX. Removal
MAX. Removal on Dia. (mm)
Best Condition Removal mm/ φ Feed mm/rev. Removal mm/ φ Feed mm/rev. MAX. Condition
Boring Range Type
28
24
φ 25 ～ 32 32 ～ 43 43 ～ 53 53 ～ 70 70 ～ 100 100 ～ 130
0.5 ～ 6.0 1.0 ～ 8.0 1.0 ～ 10.0 1.0 ～ 10.0 1.0 ～ 15.0 1.0 ～ 22.0
0.1 ～ 0.4 0.1 ～ 0.4 0.1 ～ 0.5 0.1 ～ 0.5 0.1 ～ 0.5 0.1 ～ 0.5
RAC 25 RAC 32 RAC 43 RAC 53 RAC 70 RAC100
2.0~ 4.0 3.0~ 5.0 4.0~ 7.0 4.0~ 7.0 5.0~10.0 7.0~12.0
0.2~0.3 0.2~0.3 0.2~0.3 0.2~0.3 0.3~0.4 0.3~0.4
RAC100
20
16
RAC70
12
RAC43
RAC32
RAC53
8
RAC25
4
30
40
50
60
70
80
90
100
110
120
130
Boring Range (mm)
106
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