Roller Chain Sprocket Engineer Guide

Review a candidate

1. Check the identified reference, if one was selected, and confirm that it describes the installed sprocket.
2. Read the classification and any warnings or unresolved checks before looking at the score.
3. Review the chain interface, tooth count, strand and row configuration, and drive or idler role.
4. Compare the mounting state with the required installation: bore, shaft, keyway, screws, bushing or idler support as applicable.
5. Check the body and hub arrangement, chainline and clearance against the installation. A physical difference may matter even if other comparisons match.
6. For an idler, review the bearing, support and retention details. Check mounting or tensioner information when it is displayed.
7. If the result requires modification or confirmation, read the specific operations or facts to verify before making a selection.

An unfinished stock bore is not a finished shaft bore. If the application needs a finished bore, provide that requirement and its dimensions. Do not infer that two sprockets are interchangeable from chain pitch or tooth count alone.

For a resolved exact reference, the known physical body and hub arrangement can establish a construction compatibility requirement. A discovery search does not automatically acquire that requirement: provide the needed arrangement or limits when they matter.