Fixed and opening dimensions.

F: Solid tool dimensions. This can achieve tighter tolerances on the finished part compared to "C".

C: Open tool dimensions, they have a wider tolerance and therefore cannot achieve the same tolerances as "F"

See drawing of tool for explanation of F and C

Tolerances classes.

M1: This tolerance class is only used for precision molded parts. This normally requires one cavity tools, custom rubber mixtures. Means high detail costs.

M2: Used for moulded parts with high demands. In many cases, the demands on materials and process is like, M1 tolerances.

M3: Used for molding parts with normal tolerance requirements.

M4: Use for details where the dimensions are not as critical.