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4JJRE RPM : rev./min Feed : mm/min

Prehardened Steels / Hardened Steels Hardened Steels

Material NAK / SKD STAVX / SKD / SKT SKD11 / SKD61 SKD / SKD11 SKD11 / SKS / SKH51

Hardness 40HRc ~ 50HRc 50HRc ~ 55HRc 55HRc ~ 60HRc 60HRc ~ 65HRc 65HRc ~ 70HRc

Outside Diameter RPM FEED RPM FEED RPM FEED RPM FEED RPM FEED
1mm
2mm 38,000 1,050 25,500 710 20,500 430 16,000 270 12,500 175
3mm 26,000 1,250 17,500 840 14,500 520 11,000 320 9,500 230
4mm 17,300 1,250 11,500 840 520 320 6,400 230
5mm 13,200 1,300 880 9,500 540 7,500 4,750 4,750 240
6mm 12,500 1,500 8,800 1,000 7,200 580 335 370 4,450 270
8mm 10,350 1,400 8,300 950 6,400 560 350 3,700 260
10mm 1,350 6,900 900 5,300 520 5,100 330 2,800 240
12mm 7,800 1,260 5,200 840 4,000 480 4,200 310 2,200 220
6,150 1,260 4,100 840 3,200 480 3,200 300 1,860 220
5,250 3,500 2,650 2,550
0.03D 2,100

Depth of Cut 1.0D

6JJHE RPM : rev./min Feed : mm/min

Hardened Steels Hardened Steels

Material SKD11 SKS / SKH

Hardness 55HRc ~ 62HRc 62HRc ~ 68HRc

Outside Diameter RPM FEED Ap RPM FEED Ap
3mm 1,200
4mm 16,000 1,900 0.1 11,000 1,300 0.05
5mm 12,000 2,200 0.1 8,000 1,500 0.05
6mm 10,000 2,500 0.1 6,000 1,800 0.05
8mm 2,900 0.2 5,300 1,800
10mm 8,000 2,900 0.2 4,000 1,800 0.1
12mm 6,000 2,900 0.3 3,200 1,500 0.1
16mm 4,800 2,400 0.3 2,700 1,100 0.2
20mm 4,000 1,800 0.5 2,000 0.2
25mm 3,000 1,400 0.5 1,600 880 0.3
2,400 1,000 0.5 1,000 700 0.3
2,000 0.4
0.03D (D 3)
0.05D 0.05D (D 3)
(MAX. 0.5mm)
Depth of Cut 1.5D
1D

215 JJ TOOLS