Half drive and/or holding shaft for grinding machine of optical glass of spectacles, has indexing tooth longitudinally extending from connection base to adapter until free edge, where side edges of tooth converge from base to edge

摘要

The drive shaft (44A) and/or holding shaft has a removable adapter (62) and a metal body (60) including a complementary unit to angularly position the adapter relative to the body around a longitudinal axis (L). The positioning unit has an indexing tooth (126) carried by the adapter. A recess (86) for reception of the projection is formed in the body. The indexing tooth longitudinally extends from a connection base (130) to the adapter until a free edge (132). Side edges (134, 136) of the indexing tooth converge toward each other from the base to the free edge.