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Flattening and Allowable Clamping Marks
on round leads when forming.......
From: IPC J-STD-001 ES: For Round Leads & Thru-Hole Applications

6.1.2 Lead Deformation Limits: Whether leads are formed manually, by machine or by die, parts or components shall not be mounted if the part or component lead has any nicks, scrapes or gouges. Smooth indentations up to 10%, e.g. tooling marks, and as allowed for intentionally flattened leads, of the diameter, width or thickness of the lead are acceptable.

From: IPC J-STD-001ES: For surface mounting of components with any type of leads, including round leads. Whether leads are formed manually or by machine or die, parts or components shall not be mounted if the part or component lead has nicks or deformation exceeding 10% of the diameter, width, or thickness of the lead except as allowed for flattened leads. Exposed basis metal is acceptable if deformation does not exceed 10% of the diameter, width, or thickness of the lead.

7.1.1 Lead Deformation Limits: Whether leads are formed manually or by machine or die, parts or components shall not be mounted if the part or component lead has nicks or deformation exceeding 10% of the diameter, width, or thickness, of the lead except as allowed for flattened leads. Exposed basis metal is acceptable if deformation does not exceed 10% of the diameter, width, or thickness of the lead.


For more information, contact:

Robert Antonelli
888-326-2678 x719
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