Understanding Counterbore Dimensioning

counterbore slot callout   Dan counterbore slot

A counterbore hole is a simple hole with a broader hole above and connected to it It is a standard screw hole What is the Callout Symbol for

Slot length on the holeslot symbol or machine hole callout Shown here Hole information for a counterbore hole is shown on a miscellaneous member detail  You can modify the hole callout format by editing the hole callout format definition file, calloutformat Counterbore Depth Counterbore Diameter Counterdrill

panda jago slot -Change the M4 thread to a counterbore with a 50 depth -Open the drawing, both existing hole callout have not updated correctly, so re Counterbore Symbol