gear presure angle gear presure angle LM86 (Mechanical) (OP) 11 Nov 15 15:29 we have a job that calls out a pressure angle of 14.5° V.C.D. can anyone tell me what the V.C.D. stands for? RE: gear presure angle tbuelna (Aerospace) 12 Nov 15 06:47 There is probably a difference between the pressure angle as manufactured and the operating pressure angle. Do a search for "profile shift" and "operating pressure angle". RE: gear presure angle mechedoc (Mechanical) 10 Feb 16 17:39 Hmm... I've never seen VCD on a customer print, but without any more information I would be looking into VCD = variable center distance. 14.5° is probably the theoretical/manufactured pressure angle, from there the operating pressure angle would depend on the center distance between the two members.