B256X
Recommended Milling Conditions
Side Milling
GR.3 Hi-alloyed Steel （ ~30HRC ）
GR.4 Hardened Steel （ 30~38HRC ）
GR.5 Hardened Steel （ 38~48HRC ）
GR.6 Hardened Steel （ 48~56HRC ）
GR.2 Low-alloyed Steel （ ~24HRC ）
GR.9 Cast Iron
GR.1 Carbon Steel
Work Material
Ø1.0~2.5 60~80 Ø3.0~20 80~85
Ø1.0~2.5 60~80 Ø3.0~20 80~85
Ø1.0~2.5 47~70 Ø3.0~20 70~75
Ø1.0~1.5 47~57 Ø1.5~20 57~70
Ø1.0~2.5 30~47 Ø3.0~20 50~60
Ø1.0~2.5 60~80 Ø3.0~20 80~85
Ø1.0~20 22~30
Vc m/min
RPM (min-1)
Feed (mm/min)
RPM (min-1)
Feed (mm/min)
RPM (min-1)
Feed (mm/min)
RPM (min-1)
Feed (mm/min)
RPM (min-1)
Feed (mm/min)
RPM (min-1)
Feed (mm/min)
RPM (min-1)
Feed (mm/min)
Code No.
Dc
B256X-1
1 20,000 240 20,000 240 15,000 215 15,000 215 10,000 85
7,100 5,100 3,900 3,000 2,700 2,200 1,900 1,500 1,100
40 50 60 60 60 70 75 70 65 65 60 45 35
20,000 240 13,500 245 13,000 300 10,000 320
B256X-1.5
1.5 13,500 245 13,500 245 12,000 215 12,000 215 2 13,000 300 13,000 300 11,000 280 11,000 280
8,000 7,000 6,000 5,300 4,200 3,500 2,900 2,200 1,700 1,400 1,200
90
B256X-2
110 120 125 130 140 145 145 145 140 130 110
B256X-2.5 B256X-3 B256X-4 B256X-5 B256X-6 B256X-8 B256X-10 B256X-12 B256X-16 B256X-20
2.5 10,000 320 10,000 320
9,000 7,200 5,500 4,350 3,700 2,700 2,200 1,800 1,300 1,100
300 350 360 420 425 425 420 420 400 370
9,000 7,200 5,500 4,350 3,700 2,700 2,200 1,800 1,300 1,100
300 350 360 420 425 425 420 420 400 370
3 8,800 4 6,600 5 5,300 6 4,500 8 3,300 10 2,600 12 2,200 16 1,600 20 1,300
500 530 600 610 590 580 580 530 510
8,800 6,600 5,300 4,500 3,300 2,600 2,200 1,600 1,300
500 530 600 610 590 580 580 530 510
8,800 6,600 5,300 4,500 3,300 2,600 2,200 1,600 1,300
500 530 600 610 590 580 580 530 510
950 800 600 470
890
ap:1.5D
ap:1.5D
ap:1.5D
ap:1.5D
ap:1.5D
ap:1.5D
ap:1.5D
ae:<3 0.05D ≥3 0.1D
ae:<3 0.05D ≥3 0.1D
ae:<3 0.05D ≥3 0.1D
ae:<3 0.05D ≥3 0.1D
ae:<3 0.05D ≥3 0.1D
ae:<3 0.05D ≥3 0.1D
（ mm ）
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.
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