for vertical surfaces to ensure the part ejects without distorting its dimensions Nominal Design: Always design your CAD parts at the
: For high-accuracy fittings, designers can use the "steel off" approach, designing features slightly smaller so they can be precisely adjusted by removing steel from the mold after initial testing. din 16742 - tg5
: Using TG5 allows engineers to define acceptable variations without having to specify tolerances for every single dimension on a drawing, simplifying the design process and setting clear expectations with manufacturers. for vertical surfaces to ensure the part ejects
DIN 16742 TG5 refers to a specific "Tolerance Group" (TG) within the German standard for injection-molded plastic part tolerances. While is the most common standard for general industrial parts, While is the most common standard for general
Always add a note to your drawing: "All dimensions per DIN 16742 - TG5 unless otherwise noted. Material group B (POM). Shrinkage pre-settlement required." This single line has saved countless tooling reworks.