Allowable Dimensional Tolerances

No.Standard PartClassification of Standard DimensionsStandard Values*Example
Normal bending
  • R bending
  • (FR bending)
  • Sheet Thickness
  • ≦10mm
  • (0.3937in)
  • Sheet Thickness
  • >10mm
  • (0.3937in)
  • Sheet Thickness
  • ≦3.2mm
  • (0.1260in)
1Section with no bending6 or less±0.1±0.3±0.3Example
More than 6, equal to or less than 30±0.2±0.5±0.5
More than 30, equal to or less than 120±0.3±0.8±0.8
More than 120, equal to or less than 400±0.5±1.2±1.2
More than 400, equal to or less than 1,000±0.8±2.0±2.0
More than 1,000, equal to or less than 2,000±1.2±3.0±3.0
2Section with bending6 or less±0.3±0.5±0.5
More than 6, equal to or less than 30±0.5±1.0±1.0
More than 30, equal to or less than 120±0.8±1.5±1.5
More than 120, equal to or less than 400±1.2±2.5±2.5
More than 400, equal to or less than 1,000±2.0±4.0±4.0
More than 1,000, equal to or less than 2,000±3.0±6.0±6.0
  • *General tolerance for JIS B 0408 metal pressed products: use Grade B (plate thickness≦10mm), Grade C (plate thickness>10mm). For R bend it will be Grade C.
  • *If a painting/coating is specified, the standard value for material conditions is used.

The allowable dimensional tolerances are applicable only for dimensions for between holes on the same face and end-faces/perpendicular-faces that are adjacent as a result of the bending.
The tolerances are not applicable for hole-to-hole or hole-to-end face dimensions on non-adjacent faces (across multiple bent sections).

Example 1) Dimensions for which allowable dimensional tolerances are applicable

Example 1) Dimensions for which allowable dimensional tolerances are applicable

Example 2) Dimensions for which allowable dimensional tolerances are not applicable

Example 2) Dimensions for which allowable dimensional tolerances are not applicable