Tapered Keys | McMaster-Carr

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1018-1045 Carbon Steel

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Tapered Gib Keys

These keys have a tapered body that wedges in to the keyway for a more secure fit than standard machine keys. The gib head makes these keys easy to remove when parts need to be taken apart frequently, such as for maintenance or prototyping. Keys are tapered along their length. Use them to connect gears and other components with tapered keyways to shafts. Keys are made of steel.

Inch—The height of inch keys decreases by _1/8" for every 12" of length. They conform to ASME B17.1 Class 1 standards for dimensions and tolerances.

Metric—The height of metric keys decreases by 1 mm for every 100 mm of length. They meet DIN 6887, an international standard for machine keys.

		Tolerance		Head
	Lg.	Ht.	Wd.	Ht.	Lg.	End Ht.	Rate of Taper	Specs. Met	System of Measurement		Each
1018-1045 Carbon Steel







				3/16" × 3/16"

				1 1/2"	-0.002" to 0.000"	-0.002" to 0.000"	5/16"	9/32"	0.174"	1:96	ASME B17.1 Class 1	Inch	000000000	00000


				2"	-0.002" to 0.000"	-0.002" to 0.000"	5/16"	9/32"	0.169"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
				3"	-0.002" to 0.000"	-0.002" to 0.000"	5/16"	9/32"	0.158"	1:96	ASME B17.1 Class 1	Inch	000000000	0000




						1/4" × 1/4"

						1 1/2"	-0.002" to 0.000"	-0.002" to 0.000"	1/2"	3/8"	0.237"	1:96	ASME B17.1 Class 1	Inch	000000000	0000


						2"	-0.002" to 0.000"	-0.002" to 0.000"	1/2"	3/8"	0.232"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
						2 1/2"	-0.002" to 0.000"	-0.002" to 0.000"	1/2"	3/8"	0.227"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
						3"	-0.002" to 0.000"	-0.002" to 0.000"	1/2"	3/8"	0.221"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
						3 1/2"	-0.002" to 0.000"	-0.002" to 0.000"	1/2"	3/8"	0.216"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
						4"	-0.002" to 0.000"	-0.002" to 0.000"	1/2"	3/8"	0.211"	1:96	ASME B17.1 Class 1	Inch	000000000	0000




								5/16" × 5/16"

								2"	-0.002" to 0.000"	-0.002" to 0.000"	1/2"	7/16"	0.295"	1:96	ASME B17.1 Class 1	Inch	000000000	0000


								2 1/2"	-0.002" to 0.000"	-0.002" to 0.000"	1/2"	7/16"	0.290"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
								3"	-0.002" to 0.000"	-0.002" to 0.000"	1/2"	7/16"	0.285"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
								4"	-0.002" to 0.000"	-0.002" to 0.000"	1/2"	7/16"	0.274"	1:96	ASME B17.1 Class 1	Inch	000000000	0000




										3/8" × 3/8"

										1"	-0.002" to 0.000"	-0.002" to 0.000"	5/8"	1/2"	0.368"	1:96	ASME B17.1 Class 1	Inch	000000000	0000


										1 1/2"	-0.002" to 0.000"	-0.002" to 0.000"	5/8"	1/2"	0.363"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
										2"	-0.002" to 0.000"	-0.002" to 0.000"	5/8"	1/2"	0.358"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
										2 1/2"	-0.002" to 0.000"	-0.002" to 0.000"	5/8"	1/2"	0.353"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
										3"	-0.002" to 0.000"	-0.002" to 0.000"	5/8"	1/2"	0.348"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
										3 1/2"	-0.002" to 0.000"	-0.002" to 0.000"	5/8"	1/2"	0.342"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
										4"	-0.002" to 0.000"	-0.002" to 0.000"	5/8"	1/2"	0.337"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
										4 1/2"	-0.002" to 0.000"	-0.002" to 0.000"	5/8"	1/2"	0.332"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
										5"	-0.002" to 0.000"	-0.002" to 0.000"	5/8"	1/2"	0.327"	1:96	ASME B17.1 Class 1	Inch	000000000	0000




												7/16" × 7/16"

												4"	-0.002" to 0.000"	-0.002" to 0.000"	3/4"	9/16"	0.400"	1:96	ASME B17.1 Class 1	Inch	000000000	0000


4 1/2"	-0.002" to 0.000"											-0.002" to 0.000"	3/4"	9/16"	0.395"	1:96	ASME B17.1 Class 1	Inch	000000000	0000




		1/2" × 1/2"

		2"	-0.002" to 0.000"									-0.002" to 0.000"	3/4"	5/8"	0.484"	1:96	ASME B17.1 Class 1	Inch	000000000	0000


		2 1/2"	-0.002" to 0.000"									-0.002" to 0.000"	3/4"	5/8"	0.479"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
		3"	-0.002" to 0.000"									-0.002" to 0.000"	3/4"	5/8"	0.474"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
		3 1/2"	-0.002" to 0.000"									-0.002" to 0.000"	3/4"	5/8"	0.469"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
		4"	-0.002" to 0.000"									-0.002" to 0.000"	3/4"	5/8"	0.464"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
		4 1/2"	-0.002" to 0.000"									-0.002" to 0.000"	3/4"	5/8"	0.458"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
		5"	-0.002" to 0.000"	-0.002" to 0.000"								3/4"	5/8"	0.453"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
		5 1/2"	-0.002" to 0.000"	-0.002" to 0.000"	3/4"							5/8"	0.448"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
		6"	-0.002" to 0.000"	-0.002" to 0.000"	3/4"							5/8"	0.443"	1:96	ASME B17.1 Class 1	Inch	000000000	0000




				5/8" × 5/8"

				3"	-0.004" to 0.000"							-0.004" to 0.000"	1"	3/4"	0.600"	1:96	ASME B17.1 Class 1	Inch	000000000	0000


				3 1/2"	-0.004" to 0.000"							-0.004" to 0.000"	1"	3/4"	0.595"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
				4"	-0.004" to 0.000"							-0.004" to 0.000"	1"	3/4"	0.590"	1:96	ASME B17.1 Class 1	Inch	000000000	0000
				4 1/2"	-0.004" to 0.000"							-0.004" to 0.000"	1"	3/4"	0.585"	1:96	ASME B17.1 Class 1	Inch	000000000	00000
				5"	-0.004" to 0.000"	-0.004" to 0.000"						1"	3/4"	0.579"	1:96	ASME B17.1 Class 1	Inch	000000000	00000
				5 1/2"	-0.004" to 0.000"	-0.004" to 0.000"	1"					3/4"	0.574"	1:96	ASME B17.1 Class 1	Inch	000000000	00000
				6"	-0.004" to 0.000"	-0.004" to 0.000"	1"					3/4"	0.569"	1:96	ASME B17.1 Class 1	Inch	000000000	00000




						3/4" × 3/4"

						4"	-0.004" to 0.000"					-0.004" to 0.000"	1 1/8"	7/8"	0.716"	1:96	ASME B17.1 Class 1	Inch	000000000	00000


						4 1/2"	-0.004" to 0.000"					-0.004" to 0.000"	1 1/8"	7/8"	0.711"	1:96	ASME B17.1 Class 1	Inch	000000000	00000
						5"	-0.004" to 0.000"	-0.004" to 0.000"				1 1/8"	7/8"	0.706"	1:96	ASME B17.1 Class 1	Inch	000000000	00000
						5 1/2"	-0.004" to 0.000"	-0.004" to 0.000"	1 1/8"			7/8"	0.701"	1:96	ASME B17.1 Class 1	Inch	000000000	00000
						6"	-0.004" to 0.000"	-0.004" to 0.000"	1 1/8"			7/8"	0.695"	1:96	ASME B17.1 Class 1	Inch	000000000	00000




								7/8" × 7/8"

								4"	-0.004" to 0.000"			-0.004" to 0.000"	1 1/4"	1"	0.842"	1:96	ASME B17.1 Class 1	Inch	000000000	00000


								5 1/2"	-0.004" to 0.000"			-0.004" to 0.000"	1 1/4"	1"	0.827"	1:96	ASME B17.1 Class 1	Inch	000000000	00000
								6"	-0.004" to 0.000"			-0.004" to 0.000"	1 1/4"	1"	0.822"	1:96	ASME B17.1 Class 1	Inch	000000000	00000




										1" × 1"

										5"	-0.004" to 0.000"	-0.004" to 0.000"	1 1/2"	1 1/8"	0.958"	1:96	ASME B17.1 Class 1	Inch	000000000	00000


										6"	-0.004" to 0.000"	-0.004" to 0.000"	1 1/2"	1 1/8"	0.948"	1:96	ASME B17.1 Class 1	Inch	000000000	00000




										6 mm × 6 mm

										40 mm	0.000 mm to 0.100 mm	-0.030 mm to 0.000 mm	10 mm	6 mm	5.660 mm	1:100	DIN 6887	Metric	000000000	0000




												7 mm × 8 mm

												40 mm	0.000 mm to 0.200 mm	-0.036 mm to 0.000 mm	11 mm	8 mm	6.670 mm	1:100	DIN 6887	Metric	000000000	0000


												50 mm	0.000 mm to 0.200 mm	-0.036 mm to 0.000 mm	11 mm	8 mm	6.570 mm	1:100	DIN 6887	Metric	000000000	0000




												8 mm × 10 mm

												60 mm	0.000 mm to 0.200 mm	-0.036 mm to 0.000 mm	12 mm	10 mm	7.480 mm	1:100	DIN 6887	Metric	000000000	00000




														10 mm × 16 mm

														60 mm	0.000 mm to 0.200 mm	-0.043 mm to 0.000 mm	16 mm	16 mm	9.500 mm	1:100	DIN 6887	Metric	000000000	00000




														11 mm × 18 mm

														90 mm	0.000 mm to 0.200 mm	-0.043 mm to 0.000 mm	18 mm	18 mm	10.210 mm	1:100	DIN 6887	Metric	000000000	00000