VU-TBR
Cutting Conditions
List 3785: EXOCARB VU-TBR: Using Peripheral Edge Radius (R2)
Hardness
< 30 HRC
30 - 45 HRC
45 - 55 HRC
Work Material Cutting Speed
Carbon Steel Alloy Steel
Hardened Steel Prehardened Steel
Hardened Steel Prehardened Steel
360 SFM
300 SFM
230 SFM
Depth of Cut
Aa = 0.012"
Aa = 0.012"
Aa = 0.012"
Speed RPM
Feed in/min
Speed RPM
Feed in/min
Speed RPM
Feed in/min
Mill Dia.
Pitch
Pitch
Pitch
6 (R0.5 x R150 x 20°) 8 (R1 x R150 x 20°) 10 (R1.5 x R300 x 20°) 12 (R2 x R300 x 20°) 16 (R2.5 x R500 x 20°) 16 (R3 x R500 x 20°)
10700
133.9
8800 6000 4600 3700 2800 2700
98.5 67.0 51.2 63.0 47.3 43.4
6800 4700 3600 2900 2200 2100
63.0 43.4 35.5 39.4 31.5 31.5
7300 5600 4500 3400 3300
90.6 70.9 86.7 63.0 63.0
Based on cusp height (See chart below)
Based on cusp height (See chart below)
Based on cusp height (See chart below)
1. This chart should be used when machining with the Peripheral Edge Radius, R2. 2. Use a rigid and precise machine and holder. 3. Use a coolant with low air-blow or fuming property according to the work material. MQL (oil mist coolant) is recommended for cutting hardened steels. 4.Using Peripheral Edge Radius (R2)” is the guide to use the intermediate position of peripheral edge radius. Please adjust the rotation speed, feed rate and cutting pitch based on the cutting shape, machine rigidity, workpiece and holding conditions.
5. When chattering, vibration or abnormal cutting noise occurs, please adjust the rotation speed, feed rate and cutting pitch. 6. In order to change the rotation speed, both the rotation speed and the feed rate should be changed at the same ratio.
Theoretical Cusp Height
VU-TBR Taper Barrel Type
Cusp Height and Pitch
0.020 0.018 0.016 0.014 0.012 0.010 0.008 0.006 0.004 0.002 0
（mm）
Pitch
Peripheral edge R R150 R300 R500
1
2
3
4
6
7
8
9
10
5
（mm）
Pitch
h = 0.5 × ( 2×R2- (2×R2) 2 - P 2 ) h: Cusp Height P:Pitch R2: Peripheral Edge R
osgtool.com
1486
End Mill Technical
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