331 / 396
DRILLS
DRILLS
331
www.kyocera-sgstool.com
FRACTIONAL
Single Flute Countersink
Series
601
Fractional
Hardness
Vc
(sfm)
Diameter (D
1
)
(inch)
1/8
3/16
1/4
3/8
1/2
3/4
1
P
CARBON STEELS
1018, 1040, 1080, 1090,
10L50, 1140, 1212,
12L15, 1525, 1536
≤ 175 Bhn
or
≤ 7 HRc
125
RPM 3820
2547
1910
1273
955
637
478
(100-150)
Fr
0.0005
0.0008
0.0010
0.0016
0.0021
0.0031
0.0042
Feed (ipm)
2.0
2.0
2.0
2.0
2.0
2.0
2.0
≤ 300 Bhn
or
≤ 32 HRc
60
RPM 1834
1222
917
611
458
306
229
(48-72)
Fr
0.0005
0.0007
0.0010
0.0015
0.0020
0.0029
0.0039
Feed (ipm)
0.9
0.9
0.9
0.9
0.9
0.9
0.9
≤ 425 Bhn
or
≤ 45 HRc
45
RPM 1375
917
688
458
344
229
172
(36-54)
Fr
0.0003
0.0004
0.0006
0.0009
0.0012
0.0017
0.0023
Feed (ipm)
0.4
0.4
0.4
0.4
0.4
0.4
0.4
ALLOY STEELS
4140, 4150, 4320, 5120,
5150, 8630, 86L20, 50100
≤ 275 Bhn
or
≤ 28 HRc
95
RPM 2903
1935
1452
968
726
484
363
(76-114)
Fr
0.0004
0.0007
0.0009
0.0013
0.0018
0.0027
0.0036
Feed (ipm)
1.3
1.3
1.3
1.3
1.3
1.3
1.3
≤ 375 Bhn
or
≤ 40 HRc
60
RPM 1834
1222
917
611
458
306
229
(48-72)
Fr
0.0004
0.0007
0.0009
0.0013
0.0017
0.0026
0.0035
Feed (ipm)
0.8
0.8
0.8
0.8
0.8
0.8
0.8
≤ 450 Bhn
or
≤ 48 HRc
35
RPM 1070
713
535
357
267
178
134
(28-42)
Fr
0.0003
0.0004
0.0006
0.0008
0.0011
0.0017
0.0022
Feed (ipm)
0.3
0.3
0.3
0.3
0.3
0.3
0.3
H
TOOL STEELS
A2, D2, H13, L2, M2,
P20, S7, T15, W2
≤ 250 Bhn
or
≤ 24 HRc
35
RPM 1070
713
535
357
267
178
134
(28-42)
Fr
0.0003
0.0004
0.0006
0.0008
0.0011
0.0017
0.0022
Feed (ipm)
0.3
0.3
0.3
0.3
0.3
0.3
0.3
≤ 375 Bhn
or
≤ 40 HRc
25
RPM 764
509
382
255
191
127
96
(20-30)
Fr
0.0001
0.0002
0.0003
0.0004
0.0005
0.0008
0.0010
Feed (ipm)
0.1
0.1
0.1
0.1
0.1
0.1
0.1
≤ 475 Bhn
or
≤ 50 HRc
20
RPM 611
407
306
204
153
102
76
(16-24)
Fr
0.0002
0.0002
0.0003
0.0005
0.0007
0.0010
0.0013
Feed (ipm)
0.1
0.1
0.1
0.1
0.1
0.1
0.1
K
CAST IRONS
Gray, Malleable,
Ductile
≤ 220 Bhn
or
≤ 19 HRc
105
RPM 3209
2139
1604
1070
802
535
401
(84-126)
Fr
0.0006
0.0009
0.0012
0.0018
0.0024
0.0036
0.0047
Feed (ipm)
1.9
1.9
1.9
1.9
1.9
1.9
1.9
≤ 330 Bhn
or
≤ 36 HRc
75
RPM 2292
1528
1146
764
573
382
287
(60-90)
Fr
0.0006
0.0009
0.0012
0.0018
0.0024
0.0037
0.0049
Feed (ipm)
1.4
1.4
1.4
1.4
1.4
1.4
1.4
M
STAINLESS STEELS
(FREE MACHINING)
303, 416, 420F, 430F 440F
≤ 250 Bhn
or
≤ 24 HRc
53
RPM 1620
1080
810
540
405
270
202
(42-64)
Fr
0.0003
0.0005
0.0006
0.0009
0.0012
0.0019
0.0025
Feed (ipm)
0.5
0.5
0.5
0.5
0.5
0.5
0.5
≤ 330 Bhn
or
≤ 36 HRc
46
RPM 1406
937
703
469
351
234
176
(37-55)
Fr
0.0002
0.0003
0.0004
0.0006
0.0009
0.0013
0.0017
Feed (ipm)
0.3
0.3
0.3
0.3
0.3
0.3
0.3
STAINLESS STEELS
(DIFFICULT)
304, 316, 321, 13-8 PH,
15-5PH, 17-4 PH,
Custom 450
≤ 275 Bhn
or
≤ 28 HRc
28
RPM 856
570
428
285
214
143
107
(22-34)
Fr
0.0004
0.0005
0.0007
0.0011
0.0014
0.0021
0.0028
Feed (ipm)
0.3
0.3
0.3
0.3
0.3
0.3
0.3
≤ 375 Bhn
or
≤ 40 HRc
21
RPM 642
428
321
214
160
107
80
(17-25)
Fr
0.0002
0.0002
0.0003
0.0005
0.0006
0.0009
0.0012
Feed (ipm)
0.1
0.1
0.1
0.1
0.1
0.1
0.1
continued on next page