Roller Chain Result Interpretation

Roller Chain uses class-first results.

Class	Meaning
DROP_IN_FIT	Safe direct interchange.
FIT_OR_BETTER	Controlled upgrade that preserves fit.
PENDING_VERIFICATION	Potentially useful, but proof is missing.

Important tags:

Tag	Meaning
FB_INSUFFICIENT	Candidate minimum breaking load is insufficient.
STRAND_COUNT_UNKNOWN	Strand count missing or unknown; blocks drop-in.
STRAND_COUNT_MISMATCH	Strand count conflicts.
SERIES_VARIANT_INCOMPATIBLE	Series variant cannot substitute.
WIDTH_EXCEEDS_TOLERANCE	Width envelope fails tolerance.
WIDTH_BELOW_REFERENCE	Candidate width is below reference.
PITCH_MISMATCH	Pitch does not match.
ROLLER_DIAMETER_MISMATCH	Roller diameter does not match.
UNVERIFIED_SCOPE	Scope is not proven enough.
LOW_CONFIDENCE_CORE_FIELDS	Core extraction confidence is too low.
UPGRADE_NOT_REQUESTED	Upgrade path exists but was not requested/allowed.
USER_CRITICAL_GEOMETRY_MISSING	User-critical geometry is missing.
GEOMETRY_INFERRED_FROM_STANDARD	Geometry comes from standard inference, not direct measurement.

pending_reason values explain why a row is not drop-in yet, including strand_count_unknown, scope_uncertain, width_soft_gated, confidence_gate, candidate_dimension_missing, and missing_user_critical_geometry.

Note

Partglyph results are provided to support engineering review and procurement decisions. Final suitability, approval, and use remain subject to the reviewer’s engineering judgment, site requirements, applicable standards, and the latest manufacturer documentation.