8mm ID Sprockets | McMaster-Carr

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35 Products

Sprockets

Plain Bore

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.

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







				Steel

				04B	ISO	6 mm	13	27	Plain	8 mm to 11 mm	2302K72	000000


				04B	ISO	6 mm	16	33	Plain	8 mm to 12 mm	2302K44	00000
				04B	ISO	6 mm	17	35	Plain	8 mm to 12 mm	2302K45	00000
				04B	ISO	6 mm	18	37	Plain	8 mm to 12 mm	2302K46	00000
				04B	ISO	6 mm	19	39	Plain	8 mm to 12 mm	2302K47	00000
				04B	ISO	6 mm	20	41	Plain	8 mm to 12 mm	2302K48	00000
				04B	ISO	6 mm	21	43	Plain	8 mm to 15 mm	2302K49	00000
				04B	ISO	6 mm	22	45	Plain	8 mm to 15 mm	2302K51	00000
				04B	ISO	6 mm	24	48	Plain	8 mm to 12 mm	2302K74	00000
				04B	ISO	6 mm	25	50	Plain	8 mm to 15 mm	2302K52	00000
				04B	ISO	6 mm	30	60	Plain	8 mm to 19 mm	2302K53	00000


				05B	ISO	8 mm	10	29	Plain	8 mm to 11 mm	2302K82	00000
				05B	ISO	8 mm	11	32	Plain	8 mm to 11 mm	2302K83	00000
				05B	ISO	8 mm	12	34	Plain	8 mm to 12 mm	2302K54	00000
				05B	ISO	8 mm	13	37	Plain	8 mm to 20 mm	2302K84	00000
				05B	ISO	8 mm	14	40	Plain	8 mm to 15 mm	2302K55	00000
				05B	ISO	8 mm	15	42	Plain	8 mm to 18 mm	2302K56	00000
				05B	ISO	8 mm	16	45	Plain	8 mm to 19 mm	2302K57	00000
				05B	ISO	8 mm	17	48	Plain	8 mm to 20 mm	2302K58	00000
				05B	ISO	8 mm	18	50	Plain	8 mm to 22 mm	2302K59	00000
				05B	ISO	8 mm	19	53	Plain	8 mm to 24 mm	2302K61	00000


				05B	ISO	8 mm	20	55	Plain	8 mm to 25 mm	2302K62	00000
				05B	ISO	8 mm	21	58	Plain	8 mm to 25 mm	2302K63	00000
				05B	ISO	8 mm	22	60	Plain	8 mm to 25 mm	2302K64	00000
				05B	ISO	8 mm	23	62	Plain	8 mm to 17 mm	2302K117	00000
				05B	ISO	8 mm	24	65	Plain	8 mm to 17 mm	2302K118	00000
				05B	ISO	8 mm	25	68	Plain	8 mm to 25 mm	2302K65	00000
				06B	ISO	3/8"	8	28	Plain	8 mm to 9 mm	2302K92	00000
				06B	ISO	3/8"	9	31	Plain	8 mm to 11 mm	2302K93	00000
				06B	ISO	3/8"	10	34	Plain	8 mm to 12 mm	2302K94	00000
				06B	ISO	3/8"	11	37	Plain	8 mm to 14 mm	2302K95	00000


				06B	ISO	3/8"	12	42	Plain	8 mm to 16 mm	2302K1	00000

Flat Sprockets

Save space and cut weight—these sprockets don’t have a raised hub so they’re best for tight spots and lightweight designs. Bolt or weld them to components and mounting surfaces, or add a custom hub. Although they are versatile, they’re harder to align than sprockets with hubs.

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

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







				Steel

				06B	ISO	3/8"	15	51	Plain	8 mm to 35 mm	6836N111	000000

Quick-Grip Screw-Clamp Bushings

Also known as Trantorque bushings, these tighten with a twist of the collar nut—no screws needed. As you tighten the collar nut, the inner sleeve contracts onto the shaft and the outer sleeve expands to hold your sprocket, pulley, or gear.

	OD, mm	Overall Wd., mm	Max. Torque, in·lbf		Each
Steel



	8	20	22	400	2298K41	000000

Hex Flanged Eccentric Bushings

Often used with V-groove wheels or track roller carriages, these off-center bushings create precise mounting clearance. As you turn the bushing’s hex flange with a wrench, it adjusts the distance between the V-groove wheel or carriage and the rail. Tighten the axle bolt in place once you’ve adjusted them. Made of 303 stainless steel, these bushings have very good corrosion resistance.

	Overall Wd., mm	Flange Ht., mm	Hex Size, mm		Each
303 Stainless Steel



	12	25	9	19	7744N107	000000