General tolerances The importance of considering general manufacturing tolerances for optimal quality and efficiency. Here you can find the different tolerances for the different production processes and their materials. Quotation Tolerances cnc machining Metals Examples of tolerances' applications: With drawing: Tolerance quality equivalent to IT7 can be achieved.equivalent to IT7 Without drawing: ISO 2768 fine Plastics Examples of tolerances' applications: With drawing: Tolerance quality equivalent to IT11 can be achieved. Without drawing: ISO 2768 medium Tolerances vacuum casting Examples of tolerances' applications: With drawing: Tolerance quality equivalent to IT11 can be achieved. Without drawing: ISO 2768 medium Tolerances 3D printing Examples of tolerances' applications: