PartMeld

Component selection · Practical guide

Exact model, family and variant: trace a specification to its source

A familiar series name is not enough to identify a component. Keep the exact article, its ordering options and the original document together. Treat every specification as a statement with a scope, not as a property of every similar-looking model.

Sources checked

Trace the field in five steps.

  1. Identify the exact article. Record the manufacturer, full model or part number, and any separately ordered winding, interface or option. Keep the supplier’s spelling and suffixes.
  2. Identify the statement’s scope. Check whether the source describes an exact variant, a model, a series or a shared accessory. A family document can contain model-specific columns; read the right one.
  3. Identify the document. Keep its title, revision or publication date, URL and page or table. Record when you inspected it; an observation date is not a manufacturer’s approval date.
  4. Read the field with its conditions. Keep its unit, rating label, test basis and footnotes. A matching number without a matching definition is not enough to establish comparability.
  5. Keep uncertainty visible. If an option, revision or source conflicts, record the open question. Ask the supplier which statement applies before promoting it as a confirmed specification.

Three records, two original sources

QTR-A-65-17

The QTR65 revision 2.4 sheet assigns winding N to the 65-17 column. Keep that column and its footnotes together; do not decode dimensions or ordering options from the model name alone.

Read the 65-17 record and conditionsSource: winding row, page 1

QTR-A-65-34

The same sheet assigns Y to 65-34. Being in the same series does not make its winding identical to 65-17. A shared PDF still requires a model-column check.

Open the 65-34 recordSource: 65-34 column, page 1

XH540-V150-R

The ROBOTIS manual identifies RS-485 as the physical connection and labels the torque row “stall.” Keep the -R model identity, interface and rating label together; do not transfer them to another suffix without checking its source.

Read the exact ROBOTIS recordSource: ROBOTIS specifications

These examples demonstrate source tracing. They do not establish compatibility, application fit or supplier endorsement.

Separate what is known from what needs an answer.

Use one worksheet per configuration. “Not stated” is useful information; avoid replacing it with an assumption.

A source-verification worksheet for your shortlist
FieldKeep with the recordAsk if unresolved
IdentityFull article, supplier and ordering options.Which exact configuration would be supplied?
EvidenceOriginal URL, document revision, page and model column.Which document applies to this revision or option?
SpecificationPublished value, original unit, rating label and conditions.What test basis or operating conditions apply?
DocumentsFile identity and whether it covers the model, series or accessory.Is this drawing or CAD file for the exact configuration?

If two documents disagree, keep both references and describe the difference. Check revision, units, options and rating conditions before treating it as a data error. Ask for clarification rather than silently choosing the more favourable number.

A supplier identity badge concerns the company’s identity. It does not verify every numerical field, document or application claim. A source being available also does not establish that a supplier approved PartMeld’s interpretation.

Turn open questions into a supplier enquirySend a correction with its original source

Original sources

  1. Tecnotion QTR65 specification sheet, revision 2.4, page 1 — model headings, winding row and footnotes.
  2. ROBOTIS XH540-V150-R eManual — Specifications, including Physical Connection and Stall Torque.

This is a process for reviewing evidence, not a certification of component suitability.