Beginning of supporting length of hub keyway

Symbol	d_tr
Unit	mm
Attribute-ID	beginning_of_supporting_length_hub_keyway
Numeric ID	17759
Value Type	PMTechValue

This attribute allows the user to define the supporting length of the hub keyway. If not selected, it will be automatically calculated based on the supporting length of the key and the hub width.

If this attribute is activated, the user can specify:

the supporting length of the hub keyway l_2tr and
the distance between the beginning of the feather key/shaft keyway and the beginning of the supporting length of the hub keyway d_2tr