Defining which surfaces are the primary measurement references.
Standard ISO 1133 uses a 2.16 kg weight. TG5 allows for 5kg or 10kg weights (Condition M). Iso 20457 Tg5
: Selecting TG5 implies a commitment to higher manufacturing costs compared to standard grades like TG6 or TG7. Tighter tolerances require more expensive tooling, tighter process controls, and more frequent quality assurance checks. Material Influence : Selecting TG5 implies a commitment to higher
: If you're creating an official document or a guide related to the standard, ensure that your text adheres to any guidelines provided by the standard itself or general guidelines for creating technical or instructional content. Materials with lower or more predictable shrinkage (like
Materials with lower or more predictable shrinkage (like amorphous plastics such as Polycarbonate (PC) ) are easier to hold to TG5 than semi-crystalline materials (like Nylon/PA ).
Simply stating "ISO 20457 TG5" on a drawing is often considered insufficient for a binding contract. According to the ISO 20457 Guide , a complete enforceable specification should include: TG5.