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
LU APMX
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
DC ( mm ) Part Material (Hardness) Cutting Conditions
DC ( mm ) Part Material (Hardness) Cutting Conditions
Spindle Speed (min -1 ) 4,000 to 9,000 2,700 to 5,400 2,000 to 3,800
Spindle Speed (min -1 ) 3,200 to 8,000 2,100 to 4,800 1,600 to 3,400
Feed Rate (mm/min) 240 to 540 180 to 360 140 to 260
Feed Rate (mm/min) 150 to 370 120 to 370 110 to 230
Depth of Cut a e ( mm )
Depth of Cut a e ( mm )
ø6 to 8
up to 0.1 up to 0.15 up to 0.2
ø6 to 8
up to 0.08 up to 0.12 up to 0.15
ø10 to 12 ø14 to 16
ø10 to 12 ø14 to 16
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 2 v c = 40m/min v f = 186mm/min Down-cut, Dry a p = 8mm, a e = 0.05mm
● Work Material: SCr15
a e
a e
A
(Hardened) 55 to 58HRC
● Cutting Conditions: v c = 130m/min v f = 310mm/min
B
a p
Down-cut, Dry a p = 4mm, a e = 0.05mm
a p
0.12
2μm
2μm
1 BNES1080
0.10 0.08 0.06 0.04 0.02
F
0.25mm
0.25mm
Notch Wear Chattering
2 Competitor A Hardened Steel Coating
A Dir.
B Dir.
Able to Continue
F
D D
2μm
2 Conventional Type (Straight Blade Type/ø8)
2μm
D D
D
1 BNES1120
0.25mm
0.25mm
0
5
10
15
20
25
A Dir.
B Dir.
Cutting Distance (m)
L128
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