MET

Manual / Dimension & Annotation

TOLERANCE - GD&T Feature Control Frame

Place a GD&T Feature Control Frame with symbol, tolerance value, and datums.

What it does

TOLERANCE creates a Geometric Tolerance (GD&T) frame from lines and text, so it exports to DXF and prints correctly in any program.

Where to find it

  • Ribbon: Annotate › Leaders › Tolerance (shows the list of symbols)
  • Command line: TOLERANCE (Alias TOL)

Steps

  1. Type TOLERANCE POSITION 0.05 A B and press Enter (symbol, value, datums...).
  2. TOLERANCE: click where the frame goes Click a location.

Position 0.05 A B and Flatness 0.02 frames
Position 0.05 A B and Flatness 0.02 frames

Supported symbols

Keyword Characteristic
STRAIGHTNESS Straightness
FLATNESS Flatness
CIRCULARITY Circularity
CYLINDRICITY Cylindricity
PROFILE / PROFILELINE Profile of a surface / profile of a line
ANGULARITY Angularity
PERPENDICULARITY Perpendicularity
PARALLELISM Parallelism
POSITION Position
CONCENTRICITY Concentricity
SYMMETRY Symmetry
RUNOUT / TOTALRUNOUT Runout / total runout

TOLERANCE ? lists the symbols on the Command line. The text height follows the current text height setting.

Try it: GD&T on a motor shaft

A stepped motor shaft whose middle Ø25 h6 section carries the bearing. Two feature control frames tell the inspector how round and how true that seat must be, measured against datum A.

  1. Shaft, left to right: REC 0,-10 → 40 Tab 20, REC 40,-12.5 → 60 Tab 25 (bearing seat), REC 100,-10 → 30 Tab 20. Axis: L -8,0 → 138,0.
  2. Bearing seat: DVE from 70,-12.5 to 70,12.5, placed on the shaft. Then DIMPOST %%c<> h6 and DIMOVERRIDE precision 0. It reads ⌀25 h6.
  3. Datum A: REC -6,-24 → 8 Tab 8, DT with Text height 5 and type A inside the box, then L -2,-16 → -2,-10 up to the shaft.
  4. TOLERANCE RUNOUT 0.02 A, then click above the seat at 45,22.
  5. TOLERANCE CYLINDRICITY 0.01, then click below the seat at 45,-30. Both frames use the text height 5 from step 3.

Stepped shaft with ⌀25 h6, a runout 0.02 A frame and a cylindricity 0.01 frame
Stepped shaft with ⌀25 h6, a runout 0.02 A frame and a cylindricity 0.01 frame

Challenge: Type TOLERANCE ? to list all symbols, then add TOLERANCE PERPENDICULARITY 0.03 A for the shoulder at X 40.

See also