Metal Removal Solid Carbide Drills

Series 283 and Series 285 Carbide Drills— Recommended Speeds & Feeds

Material Hardness Speed (SFM) Feed (IPR)
1/8" 3mm 1/4" 6mm 3/8" 10mm 1/2" 13mm 5/8" 16mm 3/4" 19mm
Alloyed Steel 4340, 52100, 8620, 4104

<= 28 - 32 Rc

190 - 225 .0026 .0043 .0072 .0090 .0099 .0109
<= 42 Rc 140 - 145 .0020 .0034 .0056 .0070 .0077 .0085
Mold Steel P-20, H-13, 180, D2, A2, S-5 180 - 320 BnH 190 - 225 .0029 .0048 .0080 .0100 .0110 .0121
220-250 BnH 85 - 105 .0017 .0029 .0048 .0060 .0066 .0073
50+ Rc 50 - 60 .0012 .0019 .0032 .0040 .0044 .0048

Iron Gray CI 30, G25

150 - 220 BnH 190 - 450 .0058 .0096 .0160 .0200 .0220 .0242
Iron Ductile 220 - 250 BnH 150 - 300 .0035 .0058 .0096 .0120 .0132 .0145
Iron Nodular 251 - 320 BnH 165 - 250 .0023 .0038 .0064 .0080 .0088 .0097
Stainless Steels Free 303, 420, 416

< 330 HB
<= 40 HRc

200 - 260 .0023 .0038 .0064 .0080 .0088 .0097
Stainless Steels Tough 316, 304, 15-5, 13-8, 17-4

330 - 450 BHN
36 - 48 HRc

160 - 195 .0017 .0029 .0048 .0060 .0066 .0073
Titanium Alloys Ti-6AI 4V, 6A16V

110 - 450 HB
<= 48 HRc

90 - 115 .0017 .0029 .0048 .0060 .0066 .0073
Nickel Alloys 718, Inconel, Rene, Nimonic, Waspalloy

140 - 475 HB
<= 48 HRc

55 - 80 .0012 .0019 .0032 .0040 .0044 .0048

Higher speed and feed values should be favored for software material; lower speed and feed values should be used for harder materials. These recommendations should be considered only as a starting point. Ultimate speeds and feeds will depend upon setup conditions and chip formation.

The above recommendations are for drilling a hole 2 x diameter deep. For other depths, multiply feed rate from above as follows:

Drilling Depth (N x diameter) 1 2 3 4 5
Multiplier 1.2 1.0 0.9 0.75 0.65