ISO 04B Roller Chain Sprockets

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System of Measurement

Shaft Diameter

Number of Teeth

Pitch

Roller Chain Trade Number

Strand Type

Chain Type

Bore Type

Overall Width

Hub Diameter

Shaft Type

Chain Standard

Component

Width

Material

Specifications Met

Sprocket Type

U.S.–Mexico–Canada Agreement (USMCA) Qualifying

REACH

RoHS

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

Length

Roller Width

21 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, mm	No. of Teeth	OD, mm	Bore Type	For Shaft Dia.		Each
For Single Strand







				Steel

				04B	ISO	6	8	18	Plain	5 mm to 7 mm	2302K67	000000


				04B	ISO	6	9	20	Plain	5 mm to 7 mm	2302K68	00000
				04B	ISO	6	10	22	Plain	6 mm to 8 mm	2302K69	00000
				04B	ISO	6	11	24	Plain	6 mm to 8 mm	2302K71	00000
				04B	ISO	6	12	26	Plain	6 mm to 11 mm	2302K41	00000
				04B	ISO	6	13	27	Plain	8 mm to 11 mm	2302K72	00000
				04B	ISO	6	14	29	Plain	6 mm to 12 mm	2302K42	00000
				04B	ISO	6	15	31	Plain	6 mm to 12 mm	2302K43	00000
				04B	ISO	6	16	33	Plain	8 mm to 12 mm	2302K44	00000
				04B	ISO	6	17	35	Plain	8 mm to 12 mm	2302K45	00000
				04B	ISO	6	18	37	Plain	8 mm to 12 mm	2302K46	00000


				04B	ISO	6	19	39	Plain	8 mm to 12 mm	2302K47	00000
				04B	ISO	6	20	41	Plain	8 mm to 12 mm	2302K48	00000
				04B	ISO	6	21	43	Plain	8 mm to 15 mm	2302K49	00000
				04B	ISO	6	22	45	Plain	8 mm to 15 mm	2302K51	00000
				04B	ISO	6	24	48	Plain	8 mm to 12 mm	2302K74	00000
				04B	ISO	6	25	50	Plain	8 mm to 15 mm	2302K52	00000
				04B	ISO	6	30	60	Plain	8 mm to 19 mm	2302K53	00000

Roller Chain and Links

Chain

Connecting Links

Adding-and-Connecting

Links

Image of Attribute. Front orientation. Contains Annotated.

Pair this chain with sprockets to transmit power between rotating shafts. Like the chain on a bike, the side plates have a figure-eight shape that grips the sprockets without slipping.

Lubrication is key to smooth operation and long chain life. Routinely apply oil by hand or install an oil dispenser for continuous lubrication.

Steel—The go-to for roller chain, steel is strong and economical. While proper lubrication helps prevent rusting, it’s not as corrosion resistant as coated or stainless steel.

Connecting Link—Use a single link to join both ends of your chain. Start by removing the spring clip or cotter pin from the link’s side plate. Then, slide the link pins into the mating rollers at each end of your chain and snap the clip back on. Also known as master links.

Adding-and-Connecting Link—An all-in-one link for adding and connecting. It adds a half-pitch length at the roller end, allowing finer length adjustments than full-pitch links. The pin end connects to your chain—except for trade number 25, which requires a separate connecting link. Remove the side plate to install. Also known as half links and offset links.

							Chain		Connecting Links		Adding-and-Connecting Links
	Roller Chain
	Trade No.	Std.	Pitch, mm	Roller Dia., mm	Roller Wd., mm	Working Load, lb.		Per Ft.		Each		Each
Single Strand







				Steel

				04B	ISO	6	4.00	2.80	130	6027K71	000000	6027K33	00000	6027K42	00000