9 Teeth Sprockets | McMaster-Carr

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Roller Chain Trade Number

Number of Teeth

System of Measurement

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Bore Type

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Overall Width

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Keyway Width

Sprocket Type

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59 Products

Sprockets

For Single Strand

Sprocket teeth mesh with your roller chain to smoothly transmit power. These U.S.-made sprockets have machined teeth for a more precise fit than flame-cut or punched teeth, allowing them to glide in and out of the chain to reduce wear and extend chain life.

Steel—Steel is strong, but best for dry environments since moisture will cause it to rust.

Wear-Resistant Steel with Hardened Teeth—These sprockets have teeth that are hardened from the tip to the base so they withstand chain contact and wear evenly. That means fewer broken teeth and a longer lifespan than sprockets with unhardened or tip-hardened teeth. Steel is best for dry environments since moisture will cause it to rust.

Corrosion-Resistant 18-8 Stainless Steel—Won't corrode from frequent washdowns and mild chemicals, including ammonia often found in cleaning solutions.

Finished Bore—Mount these sprockets onto your shaft and secure with a set screw—no machining required.

Plain Bore—Plain bore sprockets give you options—machine a custom bore, weld, or press-fit them in place. They're sized to the minimum shaft diameter listed and are machinable up to the maximum.

	For Roller Chain							Keyway
	Trade No.	Std.	Pitch	No. of Teeth	OD	Bore Type	For Shaft Dia.	Wd.	Dp.		Each
For Single Strand







				Steel

				25	ANSI	1/4"	9	0.84"	Finished	1/4"	—	—	000000	000000


				25	ANSI	1/4"	9	0.84"	Plain	1/4"	—	—	000000	00000
				35	ANSI	3/8"	9	1.26"	Finished	3/8"	—	—	00000000	00000
				35	ANSI	3/8"	9	1.26"	Finished	1/2"	1/8"	1/16"	00000000	000000
				35	ANSI	3/8"	9	1.26"	Plain	3/8"	—	—	00000000	00000
				40	ANSI	1/2"	9	1.67"	Finished	1/2"	—	—	00000000	00000
				40	ANSI	1/2"	9	1.67"	Finished	5/8"	3/16"	3/32"	00000000	00000
				40	ANSI	1/2"	9	1.67"	Finished	3/4"	3/16"	3/32"	00000000	000000
				40	ANSI	1/2"	9	1.67"	Plain	1/2" to 9/16"	—	—	00000000	00000
				41	ANSI	1/2"	9	1.67"	Finished	1/2"	—	—	00000000	00000
				41	ANSI	1/2"	9	1.67"	Finished	5/8"	3/16"	3/32"	00000000	00000


				50	ANSI	5/8"	9	2.09"	Finished	5/8"	3/16"	3/32"	00000000	00000
				50	ANSI	5/8"	9	2.09"	Finished	3/4"	3/16"	3/32"	00000000	00000
				50	ANSI	5/8"	9	2.09"	Finished	1"	1/4"	1/8"	00000000	000000
				50	ANSI	5/8"	9	2.09"	Plain	5/8" to 3/4"	—	—	00000000	00000
				60	ANSI	3/4"	9	2.51"	Finished	5/8"	3/16"	3/32"	00000000	00000
				60	ANSI	3/4"	9	2.51"	Finished	3/4"	3/16"	3/32"	00000000	00000
				60	ANSI	3/4"	9	2.51"	Finished	7/8"	3/16"	3/32"	00000000	00000
				60	ANSI	3/4"	9	2.51"	Finished	1"	1/4"	1/8"	00000000	00000
				60	ANSI	3/4"	9	2.51"	Finished	1 1/8"	1/4"	1/8"	00000000	000000
				60	ANSI	3/4"	9	2.51"	Plain	3/4" to 7/8"	—	—	00000000	00000


				80	ANSI	1"	9	3.35"	Finished	1"	1/4"	1/8"	00000000	00000
				80	ANSI	1"	9	3.35"	Finished	1 1/8"	1/4"	1/8"	00000000	00000
				80	ANSI	1"	9	3.35"	Finished	1 3/16"	1/4"	1/8"	00000000	00000
				80	ANSI	1"	9	3.35"	Finished	1 1/4"	1/4"	1/8"	00000000	00000
				80	ANSI	1"	9	3.35"	Plain	1" to 1 5/16"	—	—	0000000	00000
				100	ANSI	1 1/4"	9	4.18"	Finished	1"	1/4"	1/8"	00000000	000000
				100	ANSI	1 1/4"	9	4.18"	Finished	1 1/4"	1/4"	1/8"	00000000	000000
				100	ANSI	1 1/4"	9	4.18"	Finished	1 3/8"	5/16"	5/32"	00000000	000000
				100	ANSI	1 1/4"	9	4.18"	Plain	1" to 1 5/8"	—	—	0000000	00000
				120	ANSI	1 1/2"	9	5.02"	Plain	1 3/8" to 1 13/16"	—	—	0000000	000000


				160	ANSI	2"	9	6.7"	Plain	1 1/2" to 2 1/8"	—	—	00000000	000000
				04B	ISO	6 mm	9	19.9 mm	Plain	5 mm to 7 mm	—	—	0000000	00000
				05B	ISO	8 mm	9	26.6 mm	Plain	6 mm to 8 mm	—	—	0000000	00000
				06B	ISO	3/8"	9	31 mm	Plain	8 mm to 11 mm	—	—	0000000	00000
				08B	ISO	1/2"	9	43.4 mm	Plain	10 mm to 15 mm	—	—	00000000	00000




						Wear-Resistant Steel with Hardened Teeth

						35	ANSI	3/8"	9	1.26"	Finished	3/8"	—	—	0000000	00000


						40	ANSI	1/2"	9	1.67"	Finished	1/2"	—	—	00000000	00000
						40	ANSI	1/2"	9	1.67"	Finished	5/8"	3/16"	3/32"	00000000	00000
50						ANSI	5/8"	9	2.09"	Finished	5/8"	3/16"	3/32"	00000000	00000
50	ANSI					5/8"	9	2.09"	Finished	3/4"	3/16"	3/32"	00000000	00000
60	ANSI					3/4"	9	2.51"	Finished	5/8"	3/16"	3/32"	00000000	00000
60	ANSI					3/4"	9	2.51"	Finished	3/4"	3/16"	3/32"	00000000	00000
60	ANSI					3/4"	9	2.51"	Finished	7/8"	3/16"	3/32"	00000000	00000
60	ANSI	3/4"				9	2.51"	Finished	1"	1/4"	1/8"	00000000	00000
80	ANSI	1"	9			3.35"	Finished	1"	1/4"	1/8"	00000000	00000
80	ANSI	1"	9			3.35"	Finished	1 1/8"	1/4"	1/8"	00000000	00000


80	ANSI	1"	9			3.35"	Finished	1 3/16"	1/4"	1/8"	00000000	00000
80	ANSI	1"	9			3.35"	Finished	1 1/4"	1/4"	1/8"	00000000	00000




		Corrosion-Resistant 18-8 Stainless Steel

		—	—			0.1475"	9	0.48"	Finished	1/8"	—	—	0000000	00000


		35	ANSI			3/8"	9	1.26"	Finished	3/8"	3/32"	3/64"	00000000	00000
		40	ANSI			1/2"	9	1.84"	Finished	1/2"	1/8"	1/16"	00000000	000000
		40	ANSI			1/2"	9	1.84"	Finished	5/8"	3/16"	3/32"	00000000	000000

Plastic Sprockets

Quiet-running, lightweight, and naturally rust resistant. Choose these sprockets for noise-sensitive areas, designs with weight constraints, and machines that require frequent washdowns. Their teeth mesh with your roller chain to smoothly transmit power. All are made in the U.S.

	For Roller Chain
	Trade No.	Std.	Pitch	No. of Teeth	OD	Bore Type	For Shaft Dia.		Each
For Single Strand



		—	—	0.1227"	9	0.41"	Plain	1/8"	00000000	00000


		35	ANSI	3/8"	9	1.26"	Plain	1/4" to 3/8"	000000000	00000
		40	ANSI	1/2"	9	1.67"	Plain	1/2"	000000000	00000
		50	ANSI	5/8"	9	2.09"	Plain	1/2" to 5/8"	00000000	00000

Idler Sprockets

Maintain constant tension on your roller chain to reduce wear and vibration. These sprockets press against the chain to take up slack and rotate freely on bearings to keep the chain moving smoothly. They’re often paired with roller chain tensioners.

For Single Strand

Needle-Roller

Bearing

Needle-Roller Bearing—These bearings rotate smoothly under your heaviest loads.

	For Roller Chain
	Trade No.	Std.	Pitch	No. of Teeth	For Shaft Dia.	OD	Bearing Material		Each
Needle-Roller Bearing







				Wear-Resistant Steel with Hardened Teeth

				160	ANSI	2"	9	1 1/2"	6.7"	Bronze	00000000	0000000

Sprockets for Clog-Resistant Flat-Edge Roller Chain

Prevent jams with sprockets sized to grip our Clog-Resistant Flat-Edge Roller Chain. Their short teeth stay below the chain to avoid snagging conveyed items.

Steel—Steel is strong, but best for dry environments since moisture will cause it to rust.

	OD	Bore Type	For Shaft Dia.		Each
For Single Strand







	Steel

	81X	2.609"	9	8.18"	Plain	1 1/4" to 3 7/16"	0000000	0000000