FIELD: process engineering.
SUBSTANCE: invention relates to machine building and may be used in hand-held grinders with rotary disc tool for locking protective case. Locking device has locking assembly 16a preventing protective case turning in tool disintegration. Said assembly incorporates, at least, one tough braking device to deflect from its initial position into anti-turning position driven by pulse transmitted to protective case assembly by broken tool fragment.
EFFECT: reliable and efficient protection.
20 cl, 12 dwg
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