I have approximate measurements only, because I don't have physical access to the device. This chain is driving a small conveyor. The link length is about 9.5mm, ~9mm at narrow width and ~11mm at wide width. The chain is stamped with 890 number.

enter image description here

Is this a standard size chain? What is that standard, so I can look up a matching sprocket?

  • $\begingroup$ Which chain manufacturers have you checked already? $\endgroup$
    – Solar Mike
    Feb 22, 2023 at 19:08
  • $\begingroup$ I'm getting links to 890 bicycle chains only. Could it be a bicycle chain standard? I have no experience with chains. $\endgroup$ Feb 22, 2023 at 19:13

1 Answer 1


Looking at the photo, I believe the marking is not 890 but 06B, a standard size for roller chains according to DIN ISO 606 with a pitch of 9,525 mm.

  • 1
    $\begingroup$ It makes perfect sense now. Thank you. $\endgroup$ Feb 22, 2023 at 19:22
  • $\begingroup$ AKA 3/8' Some things, like screw threads, became different because there was a need for change. Other things are just written differently. $\endgroup$
    – david
    Feb 23, 2023 at 11:14

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