Metric Roller Chain: Size, Standard, Selection Guide & Sprockets(ISO606/DIN8187/DIN8188)
About Metric Roller Chain
Metric roller chains are power-transmission chains whose dimensions are specified in millimeters according to ISO 606. In practice, two widely used "metric" series exist:
• DIN 8187/ISO 606 (B series) Roller chain — often called British/European standard metric roller chain; chain sizes like
• DIN 8188/ISO 606 (A series) Roller chain — American/ASA sizes presented in metric (e.g., 08A ≈ ANSI 40， 10A ≈ ANSI 50, etc.)
While manufacturing processes are similar to ANSI roller chains, the dimensions, part numbering, and load ratings differ between the B-series and the A-series. Selecting the correct series ensures proper fit with matching sprockets.
Roller Chain Standard on Spec Sheets
ISO 606
International dimensional standard covering roller chains and sprockets, used by both DIN 8187(B-series) and DIN 8188(A-series)
BS 228
British standard reference drequently cited alongside ISO 606 for B-series roller chains and sprockets
DIN 8187
European /British standard metric roller chain series (B-series)
DIN 8188
American series Roller chains presented in metric (A-series); aligns with ANSI B29.1 sizes
Metric Roller Chain Size
Metric Roller Chain VS. ANSI Roller Chain: Difference?
How To Select Right Metric Roller Chain
1) Confirm the series
B-Series (DIN 8187)vs A-Series (DIN 8188) based on your sprockets and regional standard.
2) Define the load & safety factor
Use nominal working load requirements and duty cycle; consult tensile/working load tables from the supplier's ISO 606 sheet.
3) Choose the size & strands
Start from a baseline (e.g., 08B-1 for light drives; consider -2/-3duplex/triplex for higher power).
4) Select material & finish
Carbon steel vs stainless or plated, depending on environment and hygiene
5) Match the sprocket
Pick tooth count, hub style, bore/finish, hardness, and keyway to match the chain and shaft.
6) Plan maintenance:
Lubrication method (manual, drip, bath), tensioners, guards, and replacement interval.
Tell us your needs.
We'll size the roller chain and sprockets for you and provide a formal quotation.
Roller Chain Type
Why Work with CTS | Professional Manufacturer
✔ Full roller chain portfolio: 05B-32B roller chains in simplex/duplex/triplex, plus DIN 8188(A series roller chain) on request.
✔ Matching sprockets: ISO 606/ BS228 sprockets with pilot or finished bore, hardened teeth, custom keyways/set-screws.
✔ Material options: Carbon steel, stainless(SS304/SS316), nickel-plated; attachments and special coatings available.
✔ Engineering support: Drive sizing, conversion between A-series and B-series, custom sprocket machining, and fast sampling.
Contact us for a quote, tell us chain series/size, length, sprocket teeth & bore type, material, etc.
FAQs
Is 08B roller chain the same as ANSI 40 roller chain?
Not exactly. 08B roller chain is DIN 8187(B series) metric; ANSI 40 is A series. Dimensions differ; use matching sprockets.
Can I run a metric roller chain on an ANSI chain sprocket？
No——always match series to series to avoid premature wear and failure.
Do you offer stainless steel roller chains?
Yes——06BSS and other stainless steel roller chains for corrosive or hygienic environments.
