Stress increasing by centric load is caused by rib placing.
Display of durability, example of centric load, 100% and 50%
Values of the maximum stress of the press frame without anchors, eccentric and centric load and varying loading force (MPa) Stress F 100% F 75% F 50% point Eccentric load A 318 241 76% 161 51% B 206 153 73% 102 50% C 221 166 75% 110 50% D * 210 160 76% 105 50% Stress F 100% F 75% F 50% point Centric load A 153 116 76% 77 50% B 166 124 75% 82 49% C 145 106 73% 72 50% D * * Point D is not stressed in centric case, because ram is not touched to ram guidance Table 2.