Answer: Part tolerances will vary from one part to the next, and is typically dependent upon the intended function of the part. While every part can be “perfect” as designed, in the real world this just isn’t the case, everything has a tolerance, it’s just a question of how tight that tolerance will be. To save molders and designers some headaches and bickering, the RMA (Rubber Manufacturers Association) was kind enough to put together a series of standardized tables of tolerances for molded rubber parts. The tables are categorized into different groups such as “Commercial”, “Precision”, and “High Precision” and are readily available for free on the internet. They’ve also created tables that reference tolerances on other aspects of the part such as miter (alignment) and flash. To learn more about RMA standard tolerances follow this link: http://www.rubberassociates.com/pdf/RMA%20tolerance%20table.pdf
Question: What are the typical tolerances for a silicone part?