Tube End Squareness Sight Ring

Tube End Squareness Sight Ring Compare a loose tube end against a broad flat reference ring by sight. Included: 1 STL file, editable CadQuery Python source, STEP geometry and notes in the source ZIP. Digital files only; tools, hardware and illustrated context objects are not included. Approximate CAD dimensions: 90.0 × 40.0 × 4.0 mm. Units: millimetres. Bring a loose tube end against the flat ring face and look for an uneven gap. Nominal 26 mm central opening; smaller tubes can pass through. Pr…

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