Indication in one direction cannot be used for outer edge clearance and inner edge connection.


  • Example of edge size :


 


Outside edge

Inside edge


  • Indication of direction of burr on outer edge or inner clearance :

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


     


Indication of burr direction on outer edge

Internal edge clearance indication :


  • Direction indicators :

 

  • Asymmetrical indications :

When it is necessary to give an asymmetrical indication of the directions of the burr of an outer edge or of the connection of an outer edge or of the connection of an inner edge, the dimension must be entered in zone C-D or E-F, as appropriate (see below).

Asymmetrical indications cannot be used for external edge burrs and internal edge clearances.


 


Connecting an external edge

Internal edge connection