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A directional indicator cannot be used for rounding outside edges or connecting inside edges.

• Example of edge size:

• Direction of the burr on an outer edge or an inner recess:

When it is necessary to specify the direction of the burr on an external edge or the clearance on an internal edge, the size must be indicated in zone C-D or E-F, as appropriate (see below).

• Directions:

• Asymmetric indications:

When it is necessary to specify the asymmetric direction of the burr on an outer edge or at the junction of an outer edge or an inner edge, the dimension must be entered in zone C-D or E-F, as appropriate (see below).

Asymmetric specifications cannot be used for external edge burrs and internal edge clearances.