DRILL SPEEDS AND FEEDS
800.255.170
1
D r i l l s
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800.255.1701High Speed Steel & Cobalt Drills Speed and Feed Recommendations
NOTE: T he speeds and feeds shown are suggested starting points only and may be increased or decreased
depending on actual material and machining conditions. Start conservatively and increase speed and feed until drilling cycle is optimized.
WORKPIECE MATERIAL
BRINELL HARDNESS BHN
SURFACE SPEED SFM
FEED PER REVOLUTION BY DRILL DIAMETER 1/8"
1/4"
1/2"
3/4"
1"
Low Carbon Steel 1018, 12L12, 1108, 1213≤1201100.00300.00400.00800.01000.0110Low & Medium Carbon Steel
1018, 1551, 11L44120 - 250650.00400.00600.01100.01300.0140Medium Carbon and Alloyed Steel
1040, 1140, 4340, 8640
≤250600.00300.00400.00800.01000.0110Tool and Die Steels P20, A2, D2, H12≤250500.00300.00400.00800.01000.0110Tool and Die Steels P20, A2, D2, H12250 - 350350.00200.00300.00600.00700.0080Free Machining Stainless Steels
303, 410, 416, 440F ≤250600.00400.00600.01100.01300.0140Moderate Machining Stainless Steels
304, 316≤300450.00200.00300.00600.00700.0080Difficult Machining Stainless Steels
17-4PH, 316L, AM350
≤300200.00200.00300.00600.00700.0080Cast Iron Soft Gray ≤1601050.00400.00600.01100.01300.0140Cast Iron Gray 160 - 260900.00400.00600.01100.01300.0140Cast Iron Ductile 250800.00300.00400.00800.01000.0110Cast Iron Malleable
250 - 330550.00200.0030 0.00600.00700.0080Titanium Alloys
Commercially Pure 99.0110 - 170900.00300.00400.00800.01000.0110Titanium Alloys
Ti-6Ai-4V , ASTM B367 Grades C-3, C-4
≤250500.00300.00400.00800.01000.0110High Temperature Alloys Inconel, Hastelloy, Waspaloy ≤150500.00300.00400.00800.01000.0110High Temperature Alloys Inconel, Hastelloy, Waspaloy 150 - 250200.00100.00200.00450.00600.0070Aluminum Alloys 2025, 6061, A140, 514.0≤1503250.00400.00600.01100.01300.0140Copper Alloys Brass and Bronze ≤200800.00400.00600.01100.01300.0140Composites & Plastics ≤1281750.00200.00300.00600.00700.0080Magnesium Alloys
AZ80A, HM12A, AM60A, ZE41A
50 - 90
325
0.0040
0.0060
0.0110
0.0130
0.0140