B272ATX / B273ATX
Recommended Milling Conditions
Finishing
GR.5 Hardened Steel （ 38~48HRC ）
GR.6 Hardened Steel （ 48~56HRC ）
GR.7 Hardened Steel （ 56~68HRC ）
Work Material
130
120
90
Vc m/min
RPM (min-1) 20,000 20,000 18,000 15,000 14,000 13,000 11,000 10,000
Feed (mm/min)
RPM (min-1) 17,000 15,000 15,000 14,000 13,000 12,500 10,000
Feed (mm/min)
RPM (min-1) 17,000 15,000 14,000 14,000 10,000 10,000
Feed (mm/min)
Code No.
Dc
B272ATX-R0.25
0.5
700 800
650 750 900
600 750 900
B272ATX/B273ATX-R0.5 1 B272ATX/B273ATX-R0.75 1.5
1,400 1,600 1,700 1,700 1,680 1,600 1,450 1,200 1,030
B272ATX/B273ATX-R1
2
1,200 1,500 1,500 1,560 1,440 1,280 1,060
1,260 1,200 1,200 1,080 1,080
B273ATX-R1.25
2.5
B272ATX/B273ATX-R1.5 3
B272ATX/B273ATX-R2
4
7,200 6,800 4,800 3,600 2,900 2,400
B272ATX/B273ATX-R2.5 5
9,600 6,400 4,800 3,800 3,200
B272ATX/B273ATX-R3 B272ATX/B273ATX-R4
6 8
6,900 5,200 4,100 3,500
960 790 700 600
B272ATX/B273ATX-R5 10 B272ATX/B273ATX-R6 12
910 800
910
ap:0.02D
ap:0.02D
ap:0.02D
（ mm ）
ae:0.02D
ae:0.02D
ae:0.02D
High-speed machining
GR.5 Hardened Steel （ 38~48HRC ）
GR.6 Hardened Steel （ 48~56HRC ）
GR.7 Hardened Steel （ 56~68HRC ）
Work Material
235
130
115
Vc m/min
RPM (min-1) 50,000 30,000 30,000 28,000 24,000 21,000 18,000 15,500 13,000
Feed (mm/min)
RPM (min-1) 40,000 24,000 17,000 14,000 12,500 10,500
Feed (mm/min)
RPM (min-1) 40,000 21,000 15,000 12,200 10,500
Feed (mm/min)
Code No.
Dc
B272ATX-R0.25
0.5
1,450 1,700 2,400 2,800 2,850 3,000 3,200 3,300 3,450 3,000 2,500 2,000
1,100 2,000 2,000 2,100 2,100 2,200 2,300 2,500 2,500 2,100 1,800 1,700
900
B272ATX/B273ATX-R0.5 1 B272ATX/B273ATX-R0.75 1.5
1,700 1,700 1,800 1,800 1,750 2,000 2,000 2,200 1,900 1,700 1,450
B272ATX/B273ATX-R1
2
B273ATX-R1.25
2.5
B272ATX/B273ATX-R1.5 3
9,000 7,900 6,800 5,700 4,500 3,700 3,100
B272ATX/B273ATX-R2
4
9,000 7,800 6,500 5,200 4,200 3,600
B272ATX/B273ATX-R2.5 5
B272ATX/B273ATX-R3 B272ATX/B273ATX-R4
6 8
9,500 7,500 6,200
B272ATX/B273ATX-R5 10 B272ATX/B273ATX-R6 12
ap:0.02D
ap:0.02D
ap:0.02D
（ mm ）
ae:0.02D
ae:0.02D
ae:0.02D
1. Please work with good rigidity / high precision facilities and collet chuck. 2. Please choose proper cutting fluid.
3. The cutting data is reference value only. Please adjust it according to your real working conditions. 4. If RPM is lower the reference value, the Feed rate (fz) and RPM should be reduced by the same proportion. 5. If vibration occurs during cutting, please reduce cutting parameter.
118
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