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Center Drills

Recommended Cutting Parameters

				Drill Diameter
Workpiece Material Group	ISO	Hardness	SFM	IPR
				1/32	1/16	1/8	¼	3/8	½
Free Machining & Low Carbon Steels 1006, 1008, 1015, 1018, 1020, 1022, 1025, 1117, 1140, 1141, 11L08, 11L14, 1213, 12L13, 12L14, 1215, 1330	P	up to 28 Rc	175	0.0005	0.001	0.0015	0.003	0.004	0.005
Medium Carbon & High Carbon Steels, Alloy Steels & Easy to Machine Tool Steels 1030, 1035, 1040, 1045, 1050, 1052, 1055, 1060, 1085, 1095, 1541, 1551, 9255, 2515, 3135, 3415, 4130, 4137, 4140, 4150, 4320, 4340, 4520, 5015, 5115, 5120, 5132, 5140, 5155, 6150, 8620, 9262, 9840, 52100, O1, O2, O6, S2, W1 to W310	P	28 to 38 Rc	165	0.0005	0.001	0.0015	0.003	0.004	0.005
Tool Steels & Die Steels O7, M1, M2, M3, M4, M7, T1, T2, T4, T5, T8, T15, A2, A3, A6, A7, H10, H11, H12, H13, H19, H21, L3, L6, L7, P2, P20, S1, S5, S7, 52100, A128, D2, D3, D4, D5, D7	P	28 to 44 Rc	150	0.0005	0.001	0.0015	0.003	0.004	0.005
Hardened Steels A2 / 52100	H	35 to 45 Rc	50	0.0005	0.001	0.0015	0.003	0.004	0.005
Stainless Steel - Austenitic 304 / 316	M	up to 28 Rc	125	0.0005	0.001	0.0015	0.003	0.004	0.005
Stainless Steel - Moderately Difficult 301, 302, 303 High Tensile, 304, 304L, 305, 420, 15-5PH, 17-4PH, 17-7PH	M	Over 28 Rc	60	0.0005	0.001	0.0015	0.003	0.004	0.005
Cast Iron - Gray CG, ASTM A48, CLASS 20, 25, 30, 35, SAE J431C, GRADES G1800, G3000, G3500, GG 10, 15, 20, 25, 30, 35, 40	K	up to 240 HB	275	0.0005	0.001	0.0015	0.003	0.004	0.005
Cast Iron Ductile & Malleable CGI 60-40-18, 65-45-12, D4018, D4512, D5506, 32510, 35108, M3210, M4504, M5503, 250, 300, 350, 400, 450	K	over 240 HB	175	0.0005	0.001	0.0015	0.003	0.004	0.005
Titanium 6Al-4V	S	up to 42 Rc	80	0.0005	0.0010	0.0015	0.003	0.004	0.005
High Temp Alloys Inconel / Hastelloy / Waspeloy / Nickel Based Alloys-Monel	S	up to 42 Rc	40	0.0005	0.0010	0.0015	0.003	0.004	0.005

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