Patent ID: 6186879
Filing Date: 2001-02-13
Classification: B24B

Abstract:
Rotary power tool including a housing (10) with a tubular extension (12), a rotation motor, and an output shaft (13) which is connected to said motor and which comprises a first section (23) journalled in said housing (10) by means of two axially spaced bearings (24, 25), a second section (26) journalled in said tubular extension (12) by means of a single bearing (27) located at the outer end of said tubular extension (12), and a connection device (30) drivingly interconnecting said first shaft section (23) and said second shaft section (26), characterized in that said connection device (30) comprises a sleeve element (31) which on one hand is rigidly secured to either one of said first shaft section (23) and said second shaft section (26) and which on the other hand is arranged to receive an end portion (36) of the other one of said first shaft section (23) and said second shaft section (26), a coupling means (34, 35) for transferring torque between said sleeve element (31) and said end portion (36), and a ball bearing (43) located between said sleeve element (31) and said end portion (36) and arranged to form a support means for accurate radial guidance of said end portion (36) relative to said sleeve element (31).