FIELD: process engineering.
SUBSTANCE: invention relates to chucks of hand-held machine working tools. Proposed chuck comprises holder to accommodate working tool stem provided with diametrically opposite locking recesses and locking device arranged on tool side surface. Locking element comprises retainers, interlocking element and return element. Retainers are brought in engagement with appropriate locking recesses of working tool cylindrical stem. Interlocking element limits displacement of retainers directed radially outward from machine axis. Return element acts at separate retainers of locking device by different forces at feeding working tool stem into holder.
EFFECT: lower forces applied to working tool at its replacement, higher reliability and longer life.
9 cl, 4 dwg
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