What size is 12B chain?
Isabella Ramos
Updated on March 03, 2026
12B Roller Chain dimensions – ISO R606
| Chain No. DIN | P x W | Pitch P (mm) |
|---|---|---|
| 12B-1 | 3/4 X 7/16″ | 19.05 |
| 12B-2 | 3/4 X 7/16″ | 19.05 |
| 12B-3 | 3/4 X 7/16″ | 19.05 |
What is a 12B chain?
12B roller chain is a 3/4″ pitch metric size chain that is manufactured to conform to all BS / DIN / ISO dimensional standards. Special orders for 12B roller chain are available for qualified OEM’s & resellers.
What are the different sizes of roller chain?
Chain standards
| Size | Pitch | Maximum Roller Diameter |
|---|---|---|
| 50 | 0.625 in (15.88 mm) | 0.400 in (10.16 mm) |
| 60 | 0.750 in (19.05 mm) | 0.469 in (11.91 mm) |
| 80 | 1.000 in (25.40 mm) | 0.625 in (15.88 mm) |
| 100 | 1.250 in (31.75 mm) | 0.750 in (19.05 mm) |
What size is 10B chain?
5/8″
10B Roller chain made to ISO R606 is 5/8″ or 15.875 mm pitch it is available in single strand 10B-1 duplex 10B-2 and triplex 10B-3. It is possible to have the chain up to 6 strands wide.
What is the pitch of a roller chain?
In terms of conveyor chain, pitch is usually defined as the distance between links, as measured from the center of the roller pin on one link to the center of the roller pin on the next link. Note that some precision link conveyors refer to the pitch as the link size.
What chain size do I need?
If your bike is equipped with the derailleur, you need a 3/32″ or 11/128″ chain. If you have a single-speed or internally geared bike, you need either 1/8″ or 3/32″. You should get the correct size, but if it is not possible, you can get the 1/8″ because it has limited compatibility with the 3/32″ sprocket.
How do you calculate chain size?
Procedure
- Calculate C, where C = CD/p.
- Calculate A, where A = Z1 + Z2.
- Calculate S, where S = Z2 – Z1.
- Refer to the adjacent table to find the T value for the calculated S value.
- Chain Length in Pitches, CL = 2C + (A/2) + (T/C)
What size is 12B roller chain?
12B roller chain is a 3/4″ pitch metric size chain that is manufactured to conform to all BS / DIN / ISO dimensional standards. Special orders for 12B roller chain are available for qualified OEM’s & resellers.
What is the pitch of a 12B chain?
This 12B British Standard roller chain is also known as 12B Metric Roller Chain, has a 0.750″ pitch, and fully meets all British Standard ISO Standards. What separates this 12B-1 chain from others on the market is the superior strength and performance offered by this chain versus others at the same or higher priced on the market.
Is Economy Plus 12b-2 a good roller chain?
Economy Plus 12B-2 roller chain conforms to all ISO standards and is a good quality, durable roller chain. This 12B-2 roller chain features heat-treated components, carbon steel construction, and solid rollers.
How long is a 10ft box chain?
This chain is most commonly supplied as 10ft boxes or 5 meter lengths including one connecting link with each, we also offer a full line of high quality 12B-4 sprockets. For more information or to get a quote please contact us and we will be happy to assist you.
