The indication in one direction cannot be used for an outer edge clearance and an inner edge connection.


  • Example of edge size:


 


Outside edge

Inside edge


  • Directional indication of the burr of an outer edge or inner clearance :

Where it is necessary to indicate a direction of burr on an outer edge or clearance on an inner edge, the size shall be indicated in field C-D or E-F, as appropriate (see below).


     


Directional indication of the burr of an outer edge

Indication of the clearance of an inner edge :


  • Directional indications :

 

  • Asymmetrical indications :

Where it is necessary to give an asymmetrical indication of the directions of the burr of an outside edge or the connection of an inside edge, the dimension shall be entered in the field C-D or E-F, as appropriate (see below).

Asymmetrical indications cannot be used for outer edge burrs and inner edge clearances.


 


Connection of an external edge

Connection of an inner edge