This machine intended for sanding, grinding, grinding and drilling applications is remarkable in that it comprises a brushless motorization device, and in that the device comprises an engine block (1) whose end (2) of the motor shaft is arranged with a fastener (3) integral with the motor frame and arranged to form the support of a ring (4) forming a cage allowing mounting on said end of the drive shaft of a bearing conical (5) and a lip seal (6), the end of the shaft being supported for receiving the working tool (7).
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