SUMIBORON Helical Master BNES Type
Hardened Steel 45 to 55HRC
Hardened Steel 55 to 60HRC
Hardened Steel 60 to 65HRC
Pre-hardened Steel
Flute
Side Milling
Helix Angle
● Special Endmill for Hardened Steel
Fig 1
RE 0.2
APMX
LU
LF
L
Body
Dimensions (mm)
Blade Dia. DC
Cutting Edge Length APMX
Neck Length LU
Overall Length LF
Shank Dia. DMM
Cat. No.
Stock
Fig
BNES 1060 BNES 1080 BNES 1100 BNES 1120 BNES 1140 BNES 1160
6.0 8.0
7.0
11.0 14.0 17.0 20.0 21.5 24.0
60 70 75 80 80 80
10 10 12 12 16 16
1 1 1 1 1 1
10.0 12.0 14.0 16.0 18.0
10.0 12.0 14.0 16.0
Grade: BN350
Recommended Cutting Conditions 1. Use dry cutting (air blow) conditions. 2. Down cut (climb milling) is recommended. 3. Make overhang as short as possible and use a high-rigidity machine.
a
e
Surface Milling
High-Hardness Hardened Steel (50 to 57HRC) Cutting Speed V C 100 to 170m/min
High-Hardness Hardened Steel (58 to 65HRC) Cutting Speed V C 80 to 150m/min
Part Material (Hardness) Cutting Conditions
Part Material (Hardness) Cutting Conditions
Spindle Speed (min -1 ) 4,000 to 9,000 2,700 to 5,400 2,000 to 3,800
Feed Rate (mm/min)
Spindle Speed (min -1 ) 3,200 to 8,000 2,100 to 4,800 1,600 to 3,400
Feed Rate (mm/min)
Depth of Cut a e ( mm )
Depth of Cut a e ( mm )
DC ( mm )
DC ( mm )
ø6 to 8
240 to 540
up to 0.1
ø6 to 8
150 to 370
up to 0.08
ø10 to 12
180 to 360
up to 0.15
ø10 to 12
120 to 370
up to 0.12
ø14 to 16
140 to 260
up to 0.2
ø14 to 16
110 to 230
up to 0.15
Performance ● Wear resistance enables high-efficiency machining
● Finished surface roughness similar to grinding
Tooling
Cutting Conditions
Tooling
Cutting Conditions
● Side Milling
● Side Milling
● Work Material: SKD11 (Hardened) 60HRC ● Cutting Conditions: 1 v c = 100m/min v f = 186mm/min
● Work Material: SCr15
a
A
a
e
e
(Hardened) 55 to 58HRC
● Cutting Conditions: v
c = 130m/min v f = 310mm/min
B
c = 40m/min v f = 186mm/min Down-cut, Dry a p = 8mm, a
2 v
Down-cut, Dry a p = 4mm, a
a
p
a
p
e = 0.05mm
e = 0.05mm
0.12
2μm
2μm
1 BNES1080
F
0.10
0.25mm
0.25mm
0.08
Notch Wear Chattering
A Dir.
B Dir.
2 Competitor A Hardened Steel Coating
0.06
Able to Continue
F
D D
0.04
2μm
2 Conventional Type (Straight Blade Type/ø8)
2μm
D D
D
1 BNES1120
0.02
0.25mm
0.25mm
0
5
10
15
20
25
A Dir.
B Dir.
Cutting Distance (m)
L128
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