What can be measured
Depending on gear type and drawing requirements, inspection can include profile/helix/pitch, gear radial runout Fr, tooth thickness and component run-out / TIR checks defined by the applicable drawing and standard.
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Quality standards
The drawing should state the governing standard and required quality grade wherever possible. This avoids ambiguity and ensures manufacturing and inspection use the same acceptance basis.
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Inspection reports and traceability
Some programmes require dimensional reports, gear charts, material certification and traceability. These requirements are best agreed before production because they influence inspection planning and documentation.
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Design for inspection
Clear datums and accessible reference surfaces make verification more robust. Where specified, record surface texture symbols and parameters such as Ra / Rz separately from gear-form and runout requirements.
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Need help with a specific gear?
Send Ondrives the drawing, model or available gear data. For new designs, include the operating duty and mating-component information so the manufacturing route can be reviewed in context.
What analytical gear inspection tells you
Gear inspection separates different sources of flank and indexing error. Reporting profile, lead, pitch and runout individually gives more engineering information than a single dimensional check.
Profile
Profile measurement evaluates the flank in the involute direction. Typical report terms include total profile Fα, slope fHα and form ffα, together with specified profile modifications.
Flank line / helix
Flank-line measurement evaluates the flank across face width b. Typical report terms are total helix Fβ, slope fHβ and form ffβ. For a helical gear these are relative to nominal β and specified crowning/end relief; worm lead angle γ uses a different convention.
Pitch and runout
Pitch checks indexing: fpt / Fp. Keep gear Fr separate from ISO GPS circular run-out, total run-out and workshop TIR; each needs its datum and measurement definition.
Quality grades are standard-specific. Do not compare grade numbers without naming the standard because numbering systems are not interchangeable. Define whether a certificate, FAIR, material traceability or detailed analytical report is required at quotation stage.