B261TX
Recommended Milling Conditions
Finishing
GR.5 Hardened Steel （ 38~48HRC ）
GR.6 Hardened Steel （ 48~56HRC ）
GR.7 Hardened Steel （ 56~68HRC ）
Work Material
230
200
180
Vc m/min
RPM (min-1)
Feed (mm/min)
RPM (min-1)
Feed (mm/min)
RPM (min-1)
Feed (mm/min)
Code No.
Dc
B261TX-R0.5 B261TX-R0.75 B261TX-R1 B261TX-R1.5 B261TX-R2 B261TX-R2.5 B261TX-R3 B261TX-R4
1
40,000 34,000 26,500 25,500 21,000 18,000 12,000
1,000 1,000 1,300 2,300 2,350 2,300 2,300 1,700 1,400 1,200
31,500 26,000 22,000 21,000 17,300 14,800 10,500
800 800
23,000 19,200 16,200 15,500 12,800 11,000
600 600 800
1.5
2 3 4 5 6 8
1,000 1,800 1,800 1,850 2,000 1,500 1,200 1,000
1,500 1,400 1,380 1,800 1,300 1,000
9,500 7,100 5,700 4,700
9,100 7,300 6,000
7,900 6,300 5,300
B261TX-R5 B261TX-R6
10 12
950
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
320
250
180
Vc m/min
RPM (min-1)
Feed (mm/min)
RPM (min-1)
Feed (mm/min)
RPM (min-1)
Feed (mm/min)
Code No.
Dc
B261TX-R3 B261TX-R4 B261TX-R5 B261TX-R6
6 8
17,500 13,000 10,500
4,000 3,000 2,500 2,000
13,000
3,000 2,300 1,800 1,500
10,000
2,000 1,500 1,200 1,000
9,800 7,900 6,600
7,500 6,000 5,000
10 12
8,700
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.
122
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