Abstract: Motorised handpiece, more particularly for used by dentists or dental technicians, the rotary movement of a motor being transmitted to a tool which can be clamped with the aid of a clamping mechanism. To this end, the rotary movement of the motor is transmitted via an integrally formed shaft to the clamped tool, both the motor and the clamping mechanism being mounted on this integrally formed shaft. As a result of the use of an integrally formed shaft, it is possible to dispense with superfluous ball bearings for mounting the shaft and no mechanical driver system is required in order to couple two separate shafts together, for example.

Abstract: In a straight motorized handpiece (101), in particular for medical purposes, preferably for a medical or dental laboratory, with a clamping device (106) arranged in a sleeve-like casing (111) for the selective clamping of tools (105) which can be inserted from the front into the handpiece (101), whereby the clamping device (106) is arranged on a drive shaft (107), which is rotatably mounted in the casing (111) by means of a rearward and a forward roller bearing (113, 114), whereby for axially retaining the drive shaft (107) a first shoulder (143) is provided on the casing (111) or on attachments thereto, against which the outer ring of one of the roller bearings (113) bears, and there is arranged a releasible arresting shoulder (145) opposite to the first shoulder (143) at an axial spacing, the first shoulder (143) is arranged on the outside of the outer ring of the associated roller bearing (113) and the arresting shoulder (145) is arranged on the outside on the other roller bearing (114), the drive shaft (1

Abstract: In a motorized handpiece (101), in particular for medical purposes, preferably for a medical or dental laboratory, with a clamping device (106) arranged in a sleeve-like casing (111) for the selective mounting of tools (105) which may be inserted into the handpiece (101) from the front, whereby for opening and closing the clamping device (106) a moveably mounted actuating part (104a) is provided which is accessible at the circumference of the motorized handpiece (101), whereby the clamping device (106) is arranged on a drive shaft (107), which is mounted by means of a casing (101) rotatable by means of a rear and a forward roller bearing (113, 114), whereby the actuating part (104a) is connected with the clamping device (106) by way of an actuating mechanism (108), and whereby a sealing system (146) is associated with the forward roller bearing (114) on the forward side of the roller bodies thereof, which has at least one sealing disk (146a) which is effective between the inner and the outer ring (114a, 114b)