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Technical Committee No TC02
Status Active
Category Mechanical Sector
Sub Category

This International Standard specifies the dimensional characteristics and concentricity tolerance requirements for key type three-jaw drill chucks with taper bore or internal thread mounts. Three classes of chucks are specified, namely: — Heavy (H) — Medium (M) — Light (L) for use in various fields of activity. Basic dimensions for three-jaw drill chuck keys are also specified.

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