Symbols for the devices used to hold a part to be machined (isostatic positionning and maintaining) acoording to the french standard NF E04-013, level 2 (implemented solution).
Point contact.
Surface contact.
Striated contact.
Dead center (fFixed tip).
Live center (turning tip).
Cleared contact.
Bowl.
Vee.
Plane spreader.
Orientor.
Contact on a machined surface.
Contact on a raw surface.
Fixed support.
Fixed centering.
Clamping.
Concentric clamping.
Irreversible support.
Reversible support.
Reversible centering.
Own work, from https://www.ac-paris.fr/portail/jcms/p1_605586/avant-projet-de-norme-pr-nf-e-04-013-portant-sur-la-symbolisation-des-prises-de-pieces ; see also http://analyse-fabrication.univ-lille1.fr/co/ch4_7_2.html
Cdang