the other axial end of the annular vane space to maintain this width at least two spacers are integrally formed on at least one the rings application_number US 64947703 A description according to fig1 a turbocharger 1 comprises in a manner known per se a turbine housing part 2 and a compressor housing part 3 connected to the turbine housing both being arranged along an axis of rotation r the turbine housing part 2 is shown partially in cross section as to illustrate a vane support ring often called u201c nozzle ring u201d carries an outer u201c guiding grid u201d of guide vanes 7 distributed over the circumference of the ring 6 these vanes may be pivoted by pivoting shafts 8 or may be pivoted about corresponding pivoting axes inserted into bores of the vane support ring 6 in this way each pair of vanes form nozzles between them whose cross section may be varied according to the pivoting position of the vanes 7 i e either being more radially oriented as shown or more tangentially so that the cross section is larger or smaller to supply a larger or smaller amount of exhaust gas of a combustion motor to a turbine rotor 4 situated in the middle along the axis r the exhaust gas being introduced by a supply channel 9 and discharged through a central short feed pipe 10 to drive a compressor rotor 21 fastened to the shaft of the turbine rotor 4 in order to control the movement or position of the guide vanes 7 an actuation device 11 is provided this device may be of any nature desired but it is preferred if it comprises a control housing 12 as.