Patent ID: 11878403
Assignee: MAKITA CORPORATION
Field: Machine tools (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A rotary tool configured to rotationally drive a tool accessory around a driving axis, the rotary tool comprising:
a tool body;
a motor housed in the tool body and configured to drive the tool accessory;
a determining part configured to determine whether or not excessive rotation of the tool body around the driving axis due to jamming of the tool accessory occurs, according to a specific determination criterion;
a monitoring part configured to monitor information relating to a use state of the rotary tool; and
a criterion changing part configured to change the determination criterion according to the use state, wherein:
the monitoring part is configured to monitor information relating to an operation time of the motor, as the information relating to the use state, and
the criterion changing part is configured to change the determination criterion according to the operation time.