ISO 08B-2 Roller Chain | McMaster-Carr

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Strand Type

Double

Roller Chain Trade Number

Component

System of Measurement

Pitch

Length

Roller Diameter

Chain Pitch Type

Chain Standard

Chain Style

Material

Link Type

Adding and Connecting

Connecting

Working Load

1,000 lb. to 1,999 lb.

Number of Teeth

Roller Width

Shaft Diameter

Specifications Met

Performance

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

Yes

Roller Chain Type

Standard

RoHS

Compliant

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

REACH

Finish

Corrosion-Resistant Coated

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17 Products

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.

Corrosion-Resistant-Coated Steel—Combines the strength of steel with the corrosion resistance of stainless steel. The coating has been tested to withstand 500 hours of salt spray, so it holds up well in wet and outdoor conditions.

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	Roller Dia.	Roller Wd.	Working Load, lb.		Per Ft.		Each		Each
Double Strand







				Steel

				08B-2	ISO	1/2"	0.335"	0.305"	1,200	6027K12	000000	6027K2	00000	6027K6	00000




						Corrosion-Resistant-Coated Steel

						08B-2	ISO	1/2"	0.335"	0.305"	1,200	1222N5	00000	1222N951	0000	1222N953	00000

Sprockets

For Double 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.

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 Double Strand







				Steel

				08B-2	ISO	1/2"	12	56	Plain	12 mm to 23 mm	3571N136	0000000


				08B-2	ISO	1/2"	16	72	Plain	14 mm to 33 mm	3571N14	000000
				08B-2	ISO	1/2"	17	76	Plain	14 mm to 36 mm	3571N141	000000
				08B-2	ISO	1/2"	18	81	Plain	14 mm to 38 mm	3571N142	000000
				08B-2	ISO	1/2"	20	89	Plain	14 mm to 40 mm	3571N144	000000
				08B-2	ISO	1/2"	21	93	Plain	16 mm to 45 mm	3571N145	000000
				08B-2	ISO	1/2"	26	113	Plain	20 mm to 56 mm	3571N15	000000
				08B-2	ISO	1/2"	30	129	Plain	20 mm to 64 mm	3571N154	000000
				08B-2	ISO	1/2"	36	153	Plain	20 mm to 73 mm	3571N157	000000
				08B-2	ISO	1/2"	38	161	Plain	20 mm to 73 mm	3571N158	000000
				08B-2	ISO	1/2"	42	177	Plain	20 mm to 73 mm	3571N16	000000