Page 26 - Demo

24 ISCAR GENERAL DRILLING HANDBOOKThe distribution of the tolerance range relative to the nominal size is labelled by letters, the capital letters for holes and lowercase letters for shafts. The value for the hole from \are positive (+), for the shaft from \to \hole from \or negative (-), for shaft form \either positive (+) or negative (-).For example:For hole %u00d88H10 the tolerance will be +0.058 i.e., the minimum possible hole diameter is 8 mm while the maximum possible hole diameter is 8.058 mm.For hole %u00d88JS10 the tolerance will be %u00b10.029 i.e., the minimum possible hole diameter is 7.971 mm while the maximum possible hole diameter is 8.029 mm.Note: In both examples the width of the tolerance is the same (0.058 mm)with a difference only in the range relative to the nominal size.AakKmMnNpPrRsStTuUvVxXyYzZzaZAzbZBBbCcCDcdDdEeEFefFfFGfgGgHhJjJSjsnominal sizehole toleranceshaft tolerance