Fast-Spiral Drill Bits | McMaster-Carr

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176 Products

About Drill Bits

Compare material, finish, length class, and decimal size equivalents.

Chip-Clearing High-Speed Steel Drill Bits

Jobbers' Length

High Helix Flute

Round Shank

Jobbers' Length

Parabolic Flute

Round Shank


Standard	Split

With flutes that lift chips out of the hole, you don't have to stop drilling to clear these bits manually. They improve coolant flow to dissipate heat and prevent clogs that can damage the bit and ruin the hole. High-speed steel is good for general purpose drilling in most metals.

High Helix Flute—Less aggressive than parabolic flutes for cleaner cuts in soft metals.

Parabolic Flute—A U-shaped groove on the flutes cuts faster and clears chips more quickly than high-helix bits, so these are better for drilling deeper holes.

Jobbers' Length—These bits have the balance of rigidity and length needed for most applications.

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these bits can last 50% longer than uncoated bits.

Titanium Nitride (TiN) Coated—Drill at higher speeds and last longer than uncoated and oxide-coated bits, especially on tough materials like hardened steel and nickel.

Uncoated—The most economical option, uncoated bits perform best when used on low-carbon steel and aluminum. Polished to reduce friction, they're also known as bright finish bits.

						Shank
	Drill Bit Size	Decimal Size Equiv.	Overall Lg.	Max. Drilling Dp.	Flute Type	Type	Size	Drill Bit Point Type		Each
Jobbers' Length





				Black Oxide

				1/16"	0.0625"	1 3/4"	0.65"	High Helix	Round	1/16"	Split	31115A41	00000
				5/64"	0.0781"	2"	0.78"	High Helix	Round	5/64"	Split	31115A42	0000
				3/32"	0.0938"	2 1/4"	0.99"	High Helix	Round	3/32"	Split	31115A43	0000
				7/64"	0.1094"	2 3/8"	1.09"	High Helix	Round	7/64"	Split	31115A44	0000
				1/8"	0.125"	2 5/8"	1.18"	High Helix	Round	1/8"	Split	31115A45	0000
				9/64"	0.1406"	2 3/4"	1.25"	High Helix	Round	9/64"	Split	31115A46	0000
				5/32"	0.1563"	3"	1.37"	High Helix	Round	5/32"	Split	31115A47	0000
				11/64"	0.1719"	3 1/8"	1.5"	High Helix	Round	11/64"	Split	31115A48	0000
				3/16"	0.1875"	3 3/8"	1.68"	High Helix	Round	3/16"	Split	31115A49	0000
				13/64"	0.2031"	3 3/8"	1.65"	High Helix	Round	13/64"	Split	31115A51	0000


				7/32"	0.2188"	3 5/8"	1.81"	High Helix	Round	7/32"	Split	31115A52	0000
				15/64"	0.2344"	3 5/8"	1.78"	High Helix	Round	15/64"	Split	31115A53	0000
				1/4"	0.25"	4"	2"	High Helix	Round	1/4"	Split	31115A54	0000
				17/64"	0.2656"	4 1/4"	2.18"	High Helix	Round	17/64"	Split	31115A55	0000
				9/32"	0.2813"	4 1/4"	2.15"	High Helix	Round	9/32"	Split	31115A56	0000
				19/64"	0.2969"	4 5/8"	2.34"	High Helix	Round	19/64"	Split	31115A57	0000
				5/16"	0.3125"	4 5/8"	2.31"	High Helix	Round	5/16"	Split	31115A58	00000
				21/64"	0.3281"	4 5/8"	2.28"	High Helix	Round	21/64"	Split	31115A59	00000
				11/32"	0.3438"	4 7/8"	2.49"	High Helix	Round	11/32"	Split	31115A61	00000
				23/64"	0.3594"	4 7/8"	2.46"	High Helix	Round	23/64"	Split	31115A62	00000


				3/8"	0.375"	5 1/4"	2.68"	High Helix	Round	3/8"	Split	31115A63	00000
				25/64"	0.3906"	5 1/4"	2.65"	High Helix	Round	25/64"	Split	31115A64	00000
				13/32"	0.4063"	5 1/4"	2.62"	High Helix	Round	13/32"	Split	31115A65	00000
				27/64"	0.4219"	5 5/8"	2.84"	High Helix	Round	27/64"	Split	31115A66	00000
				7/16"	0.4375"	5 5/8"	2.81"	High Helix	Round	7/16"	Split	31115A67	00000
				29/64"	0.4531"	5 5/8"	2.78"	High Helix	Round	29/64"	Split	31115A68	00000
				15/32"	0.4688"	6"	3.03"	High Helix	Round	15/32"	Split	31115A69	00000
				31/64"	0.4844"	6"	3"	High Helix	Round	31/64"	Split	31115A71	00000
				1/2"	0.5"	6"	2.96"	High Helix	Round	1/2"	Split	31115A72	00000
				1.0 mm	0.0394"	34 mm	10.1 mm	High Helix	Round	1 mm	Standard	30055A31	0000


				1.5 mm	0.0591"	40 mm	15 mm	High Helix	Round	1.5 mm	Standard	30055A36	0000
				2.0 mm	0.0787"	49 mm	20 mm	High Helix	Round	2 mm	Split	30055A42	0000
				2.5 mm	0.0984"	57 mm	25 mm	High Helix	Round	2.5 mm	Split	30055A47	0000
				3.0 mm	0.1181"	61 mm	27 mm	High Helix	Round	3 mm	Split	30055A53	0000
				3.5 mm	0.1378"	70 mm	32 mm	High Helix	Round	3.5 mm	Split	30055A56	0000
				4.0 mm	0.1575"	75 mm	35 mm	High Helix	Round	4 mm	Split	30055A59	0000
				4.2 mm	0.1654"	75 mm	34.6 mm	High Helix	Round	4.2 mm	Split	30055A61	0000
				4.5 mm	0.1772"	80 mm	38 mm	High Helix	Round	4.5 mm	Split	30055A62	0000
				5.0 mm	0.1968"	86 mm	42 mm	High Helix	Round	5 mm	Split	30055A64	0000
				5.5 mm	0.2165"	93 mm	46 mm	High Helix	Round	5.5 mm	Split	30055A65	0000


				6.0 mm	0.2362"	93 mm	45 mm	High Helix	Round	6 mm	Split	30055A66	00000
				6.5 mm	0.2559"	101 mm	50 mm	High Helix	Round	6.5 mm	Split	30055A67	00000
				8.5 mm	0.3346"	117 mm	58 mm	High Helix	Round	8.5 mm	Split	30055A72	00000




						Titanium Nitride (TiN) Coated

1.5 mm						0.0591"	40 mm	18 mm	Parabolic	Round	1.5 mm	Split	7333N11	0000
2.0 mm	0.0787"					49 mm	24 mm	Parabolic	Round	2 mm	Split	7333N18	0000
2.5 mm	0.0984"					57 mm	30 mm	Parabolic	Round	2.5 mm	Split	7333N19	0000
3.0 mm	0.1181"	61 mm				33 mm	Parabolic	Round	3 mm	Split	7333N21	0000
4.0 mm	0.1575"	75 mm	43 mm			Parabolic	Round	4 mm	Split	7333N22	0000
5.0 mm	0.1969"	86 mm	52 mm			Parabolic	Round	5 mm	Split	7333N23	0000
5.2 mm	0.2047"	86 mm	52 mm			Parabolic	Round	5.2 mm	Split	7333N24	0000
5.5 mm	0.2165"	93 mm	57 mm			Parabolic	Round	5.5 mm	Split	7333N25	0000
5.6 mm	0.2205"	93 mm	57 mm			Parabolic	Round	5.6 mm	Split	7333N26	0000
6.0 mm	0.2362"	93 mm	57 mm			Parabolic	Round	6 mm	Split	7333N27	00000


6.8 mm	0.2677"	109 mm	69 mm			Parabolic	Round	6.8 mm	Split	7333N29	00000
7.0 mm	0.2756"	109 mm	69 mm			Parabolic	Round	7 mm	Split	7333N31	00000
7.5 mm	0.2953"	109 mm	69 mm			Parabolic	Round	7.5 mm	Split	7333N32	00000
8.0 mm	0.315"	117 mm	75 mm			Parabolic	Round	8 mm	Split	7333N33	00000
8.5 mm	0.3346"	117 mm	75 mm			Parabolic	Round	8.5 mm	Split	7333N35	00000
10.0 mm	0.3937"	133 mm	87 mm			Parabolic	Round	10 mm	Split	7333N12	00000
10.5 mm	0.4134"	133 mm	87 mm			Parabolic	Round	10.5 mm	Split	7333N13	00000
11.0 mm	0.4331"	142 mm	94 mm			Parabolic	Round	11 mm	Split	7333N14	00000
12.0 mm	0.4724"	151 mm	101 mm			Parabolic	Round	12 mm	Split	7333N15	00000
12.5 mm	0.4921"	151 mm	101 mm			Parabolic	Round	12.5 mm	Split	7333N16	00000




		Uncoated

		1/16"	0.0625"			1 7/8"	0.78"	High Helix	Round	1/16"	Standard	2912A111	0000
		5/64"	0.0781"			2"	0.88"	High Helix	Round	5/64"	Standard	2912A112	0000
		3/32"	0.0938"			2 1/4"	1.1"	High Helix	Round	3/32"	Standard	2912A113	0000
		7/64"	0.1094"			2 5/8"	1.33"	High Helix	Round	7/64"	Standard	2912A114	0000
		1/8"	0.125"			2 3/4"	1.43"	High Helix	Round	1/8"	Standard	2912A115	0000
		9/64"	0.1406"			2 7/8"	1.53"	High Helix	Round	9/64"	Standard	2912A116	0000
		5/32"	0.1563"			3 1/8"	1.76"	High Helix	Round	5/32"	Standard	2912A117	0000
		11/64"	0.1719"			3 1/4"	1.86"	High Helix	Round	11/64"	Standard	2912A118	0000
		3/16"	0.1875"			3 1/2"	2.03"	High Helix	Round	3/16"	Standard	2912A119	0000
		13/64"	0.2031"			3 5/8"	2.13"	High Helix	Round	13/64"	Standard	2912A121	0000


		7/32"	0.2188"			3 3/4"	2.17"	High Helix	Round	7/32"	Standard	2912A122	0000
		15/64"	0.2344"			3 7/8"	2.27"	High Helix	Round	15/64"	Standard	2912A123	0000
		1/4"	0.25"			4"	2.37"	High Helix	Round	1/4"	Standard	2912A124	0000
		17/64"	0.2656"			4 1/8"	2.47"	High Helix	Round	17/64"	Standard	2912A125	0000
		9/32"	0.2813"			4 1/4"	2.52"	High Helix	Round	9/32"	Standard	2912A126	0000
		19/64"	0.2969"			4 3/8"	2.62"	High Helix	Round	19/64"	Standard	2912A127	0000
		5/16"	0.3125"			4 1/2"	2.71"	High Helix	Round	5/16"	Standard	2912A128	0000
		21/64"	0.3281"			4 5/8"	2.82"	High Helix	Round	21/64"	Standard	2912A129	0000
		11/32"	0.3438"			4 3/4"	2.92"	High Helix	Round	11/32"	Standard	2912A131	00000
		3/8"	0.375"			5"	3.06"	High Helix	Round	3/8"	Standard	2912A133	00000


		25/64"	0.3906"			5 1/8"	3.16"	High Helix	Round	25/64"	Standard	2912A134	00000
		13/32"	0.4063"			5 1/4"	3.26"	High Helix	Round	13/32"	Standard	2912A135	00000
		27/64"	0.4219"			5 3/8"	3.3"	High Helix	Round	27/64"	Standard	2912A136	00000
		7/16"	0.4375"			5 1/2"	3.4"	High Helix	Round	7/16"	Standard	2912A137	00000
		29/64"	0.4531"			5 5/8"	3.5"	High Helix	Round	29/64"	Standard	2912A138	00000
		15/32"	0.4688"			5 3/4"	3.6"	High Helix	Round	15/32"	Standard	2912A139	00000
		1/2"	0.5"			6"	3.75"	High Helix	Round	1/2"	Standard	2912A142	00000
		5.2 mm	0.2047"			86 mm	52 mm	Parabolic	Round	5.2 mm	Split	2754A98	0000
		5.6 mm	0.2205"			93 mm	57 mm	Parabolic	Round	5.6 mm	Split	2754A99	0000
		8.2 mm	0.3228"	117 mm		75 mm	Parabolic	Round	8.2 mm	Split	2754A73	00000


		8.6 mm	0.3386"	125 mm	81 mm	Parabolic	Round	8.6 mm	Split	2754A74	00000
		13.5 mm	0.5315"	160 mm	108 mm	Parabolic	Round	13.5 mm	Split	2754A88	00000
		14.0 mm	0.5512"	160 mm	108 mm	Parabolic	Round	14 mm	Split	2754A89	00000
		14.5 mm	0.5709"	169 mm	114 mm	Parabolic	Round	14.5 mm	Split	2754A91	00000
		15.0 mm	0.5906"	169 mm	114 mm	Parabolic	Round	15 mm	Split	2754A92	00000
		15.5 mm	0.6102"	180 mm	119 mm	Parabolic	Round	15.5 mm	Split	2754A933	00000
		16.0 mm	0.6299"	178 mm	120 mm	Parabolic	Round	16 mm	Split	2754A94	00000
		16.5 mm	0.6496"	184 mm	125 mm	Parabolic	Round	16.5 mm	Split	2754A95	00000
		17.0 mm	0.6693"	184 mm	125 mm	Parabolic	Round	17 mm	Split	2754A96	00000
		17.5 mm	0.689"	191 mm	130 mm	Parabolic	Round	17.5 mm	Split	2754A97	00000


		80 Ga.	0.0135"	3/4"	0.1"	High Helix	Round	0.0135"	Standard	2912A259	0000
		79 Ga.	0.0145"	3/4"	0.1"	High Helix	Round	0.0145"	Standard	2912A258	0000
		78 Ga.	0.016"	7/8"	0.16"	High Helix	Round	0.016"	Standard	2912A257	0000
		77 Ga.	0.018"	7/8"	0.16"	High Helix	Round	0.018"	Standard	2912A256	0000
		76 Ga.	0.02"	7/8"	0.15"	High Helix	Round	0.02"	Standard	2912A255	0000
		75 Ga.	0.021"	1"	0.21"	High Helix	Round	0.021"	Standard	2912A254	0000
		74 Ga.	0.0225"	1"	0.21"	High Helix	Round	0.0225"	Standard	2912A253	0000
		73 Ga.	0.024"	1 1/8"	0.27"	High Helix	Round	0.024"	Standard	2912A252	0000
		72 Ga.	0.025"	1 1/8"	0.27"	High Helix	Round	0.025"	Standard	2912A251	0000
		71 Ga.	0.026"	1 1/4"	0.33"	High Helix	Round	0.026"	Standard	2912A249	0000


70 Ga.		0.028"	1 1/4"	0.33"	High Helix	Round	0.028"	Standard	2912A248	0000
69 Ga.	0.0292"	1 3/8"	0.45"	High Helix	Round	0.0292"	Standard	2912A247	0000
68 Ga.	0.031"	1 3/8"	0.45"	High Helix	Round	0.031"	Standard	2912A246	0000
67 Ga.	0.032"	1 3/8"	0.45"	High Helix	Round	0.032"	Standard	2912A245	0000
66 Ga.	0.033"	1 3/8"	0.45"	High Helix	Round	0.033"	Standard	2912A244	0000
65 Ga.	0.035"	1 1/2"	0.57"	High Helix	Round	0.035"	Standard	2912A243	0000
64 Ga.	0.036"	1 1/2"	0.57"	High Helix	Round	0.036"	Standard	2912A242	0000
63 Ga.	0.037"	1 1/2"	0.57"	High Helix	Round	0.037"	Standard	2912A241	0000
62 Ga.	0.038"	1 1/2"	0.56"	High Helix	Round	0.038"	Standard	2912A239	0000
61 Ga.	0.039"	1 5/8"	0.62"	High Helix	Round	0.039"	Standard	2912A238	0000
60 Ga.	0.04"	1 5/8"	0.62"	High Helix	Round	0.04"	Standard	2912A237	0000
59 Ga.	0.041"	1 5/8"	0.62"	High Helix	Round	0.041"	Standard	2912A236	0000
58 Ga.	0.042"	1 5/8"	0.62"	High Helix	Round	0.042"	Standard	2912A235	0000
57 Ga.	0.043"	1 3/4"	0.68"	High Helix	Round	0.043"	Standard	2912A234	0000
56 Ga.	0.0465"	1 3/4"	0.68"	High Helix	Round	0.0465"	Standard	2912A233	0000
55 Ga.	0.052"	1 7/8"	0.79"	High Helix	Round	0.052"	Standard	2912A232	0000
54 Ga.	0.055"	1 7/8"	0.79"	High Helix	Round	0.055"	Standard	2912A231	0000
53 Ga.	0.0595"	1 7/8"	0.78"	High Helix	Round	0.0595"	Standard	2912A229	0000
52 Ga.	0.0635"	1 7/8"	0.78"	High Helix	Round	0.0635"	Standard	2912A228	0000
51 Ga.	0.067"	2"	0.9"	High Helix	Round	0.067"	Standard	2912A227	0000
50 Ga.	0.07"	2"	0.89"	High Helix	Round	0.07"	Standard	2912A226	0000
49 Ga.	0.073"	2"	0.89"	High Helix	Round	0.073"	Standard	2912A225	0000
48 Ga.	0.076"	2"	0.88"	High Helix	Round	0.076"	Standard	2912A224	0000
47 Ga.	0.0785"	2"	0.88"	High Helix	Round	0.0785"	Standard	2912A223	0000
46 Ga.	0.081"	2 1/8"	1"	High Helix	Round	0.081"	Standard	2912A222	0000
45 Ga.	0.082"	2 1/8"	1"	High Helix	Round	0.082"	Standard	2912A221	0000
44 Ga.	0.086"	2 1/8"	0.99"	High Helix	Round	0.086"	Standard	2912A219	0000
43 Ga.	0.089"	2 1/4"	1.11"	High Helix	Round	0.089"	Standard	2912A218	0000
42 Ga.	0.0935"	2 1/4"	1.11"	High Helix	Round	0.0935"	Standard	2912A217	0000
41 Ga.	0.096"	2 3/8"	1.23"	High Helix	Round	0.096"	Standard	2912A216	0000
40 Ga.	0.098"	2 3/8"	1.22"	High Helix	Round	0.098"	Standard	2912A215	0000
39 Ga.	0.0995"	2 3/8"	1.22"	High Helix	Round	0.0995"	Standard	2912A214	0000
38 Ga.	0.1015"	2 1/2"	1.28"	High Helix	Round	0.1015"	Standard	2912A213	0000
37 Ga.	0.104"	2 1/2"	1.28"	High Helix	Round	0.104"	Standard	2912A212	0000
36 Ga.	0.1065"	2 1/2"	1.27"	High Helix	Round	0.1065"	Standard	2912A211	0000
35 Ga.	0.11"	2 5/8"	1.33"	High Helix	Round	0.11"	Standard	2912A209	0000
33 Ga.	0.113"	2 5/8"	1.33"	High Helix	Round	0.113"	Standard	2912A207	0000
32 Ga.	0.116"	2 3/4"	1.45"	High Helix	Round	0.116"	Standard	2912A206	0000
31 Ga.	0.12"	2 3/4"	1.44"	High Helix	Round	0.12"	Standard	2912A205	0000
30 Ga.	0.1285"	2 3/4"	1.43"	High Helix	Round	0.1285"	Standard	2912A204	0000
29 Ga.	0.136"	2 7/8"	1.54"	High Helix	Round	0.136"	Standard	2912A203	0000
28 Ga.	0.1405"	2 7/8"	1.53"	High Helix	Round	0.1405"	Standard	2912A202	0000
27 Ga.	0.144"	3"	1.65"	High Helix	Round	0.144"	Standard	2912A201	0000
26 Ga.	0.147"	3"	1.65"	High Helix	Round	0.147"	Standard	2912A199	0000
25 Ga.	0.1495"	3"	1.65"	High Helix	Round	0.1495"	Standard	2912A198	0000
24 Ga.	0.152"	3 1/8"	1.77"	High Helix	Round	0.152"	Standard	2912A197	0000
23 Ga.	0.154"	3 1/8"	1.76"	High Helix	Round	0.154"	Standard	2912A196	0000
21 Ga.	0.159"	3 1/4"	1.88"	High Helix	Round	0.159"	Standard	2912A194	0000
20 Ga.	0.161"	3 1/4"	1.88"	High Helix	Round	0.161"	Standard	2912A193	0000
19 Ga.	0.166"	3 1/4"	1.87"	High Helix	Round	0.166"	Standard	2912A192	0000
18 Ga.	0.1695"	3 1/4"	1.87"	High Helix	Round	0.1695"	Standard	2912A191	0000
16 Ga.	0.177"	3 3/8"	1.92"	High Helix	Round	0.177"	Standard	2912A188	0000
13 Ga.	0.185"	3 1/2"	2.03"	High Helix	Round	0.185"	Standard	2912A185	0000
12 Ga.	0.189"	3 1/2"	2.02"	High Helix	Round	0.189"	Standard	2912A184	0000
11 Ga.	0.191"	3 1/2"	2.02"	High Helix	Round	0.191"	Standard	2912A183	0000
10 Ga.	0.1935"	3 5/8"	2.14"	High Helix	Round	0.1935"	Standard	2912A182	0000
9 Ga.	0.196"	3 5/8"	2.14"	High Helix	Round	0.196"	Standard	2912A181	0000
7 Ga.	0.201"	3 5/8"	2.13"	High Helix	Round	0.201"	Standard	2912A178	0000
6 Ga.	0.204"	3 3/4"	2.19"	High Helix	Round	0.204"	Standard	2912A177	0000
4 Ga.	0.209"	3 3/4"	2.18"	High Helix	Round	0.209"	Standard	2912A175	0000
3 Ga.	0.213"	3 3/4"	2.18"	High Helix	Round	0.213"	Standard	2912A174	0000
2 Ga.	0.221"	3 7/8"	2.29"	High Helix	Round	0.221"	Standard	2912A173	0000
1 Ga.	0.228"	3 7/8"	2.28"	High Helix	Round	0.228"	Standard	2912A172	0000