in fig1 a profile milling cutter 1 is shown , of the kind that can be used , for instance , to machine the profiled slot in a as turbine rotor for the root of a turbine blade . such a turbine rotor can be found , for instance , in german patent 196 11 276 c1 . the profile milling cutter 1 has a tool body 2 , which is provided on one end 3 with a receptacle for a work spindle . on its opposite end , the tool body has a profile corresponding approximately to the slot to be machined . in the longitudinal direction , two chip grooves 4 , 5 are formed , in which tip seats 6 , 7 , 8 , 9 are embodied . cutting tips 11 , 12 , 13 , 14 are retained on the tip seats . the cutting tips 11 , 12 , 13 , 14 are each firmly clamped by a central fastening screw 15 , 16 , 17 , 18 and pressed against the tip seat 6 , 7 , 8 , 9 . each cutting tip 11 , 12 , 13 , 14 has at least one respective cutting edge 21 , 22 , 23 , 24 , which determines the outer contour of the milling tool . the cutting tips 11 through 14 are disposed on a straight line , for instance , as seen particularly from fig3 . thus , the cutting edges 21 through 24 supplement one another to make one single , continuous cutting edge . thus , the relief flank surfaces and cutting rake surfaces of the cutting tips 11 , 12 , 13 , 14 adjoin one another smoothly . the tool faces are ground such that a positive clearance angle exists . the radial effective cutting angle is preferably set to be positive , and the axial effective cutting angle is preferably zero . the connection of the cutting edges 21 through 24 to one another can be seen from fig2 . it can also be seen that the cutting tips 11 , 12 , 13 , 14 are disposed at the same spacing from the pivot axis d of the tool body 2 as corresponding cutting tips 11 a , 12 a , 13 a , 14 a , which are disposed opposite with respect to the pivot axis d , and whose cutting edges 21 a , 22 a , 23 a , 24 a again supplement one another to form one complete , continuous cutting edge . the number of blades in this profile milling cutter 1 is therefore two . however , it is also possible to offset the cutting edges 21 , 22 , 23 , 24 somewhat from the cutting edges 21 a , 22 a , 23 a , 24 a , so that only portions of each cutting edge become active at a time . for example , the cutting edges 21 , 22 , 23 , 24 can be active with their portion facing upward in fig2 and with their tooth tip , while the cutting edges 21 a , 22 a , 23 a , 24 a are active with their respective lower region and tooth tip . in this way , the number of blades at the tooth tip is equal to 2 , while otherwise it is 1 . however , it is preferable for both of the blades created by lining up the individual cutting edges 21 , 22 , 23 , 24 ; and 21 a , 22 a , 23 a , 24 a to be embodied such that they are precisely congruent . between axially adjacent cutting tips , there is a seam or a small gap . this is true for both the cutting tips 11 - 14 and the cutting tips 11 a - 14 a . the seams or gaps in the row formed by the cutting tips 11 - 14 are offset axially from the seams and gaps in the row formed by the cutting tips 11 a - 14 a . therefore , the cutting tip 14 is not the same as the cutting tip 14 a . they differ from each other insofar as their axial end faces are axially offset . this is evident from fig2 which depicts line 9 a between cutting inserts 13 a and 14 a as axially offset from line 9 aa between cutting inserts 13 and 14 . the same is true for the other cutting tips 11 , 11 a ; 12 , 12 a ; 13 , 13 a ; 14 , 14 a that respectively overlap one another in the circumferential direction . this is also true for the profile milling cutter 1 of fig4 in which the cutting tips 11 , 12 , 13 , 14 are offset somewhat from one another in the circumferential direction . however , the cutting tips 11 , 12 , 13 , 14 are installed each with the same radial effective cutting angle , so that the cutting conditions match . however , they come into engagement with the workpiece successively , so that the tool body has to transmit only the driving torque for one cutting tip at a time . more favorable conditions in terms of chip removal are also obtained , because the chips occur in succession as do the cutting tips . in all the profile milling cutters 1 presented , a tip seat as shown in fig5 is provided . the tip seat has a plane bearing face 27 , which corresponds approximately to the contour of the respective cutting tip , so that the cutting tip is supported over virtually its entire back side ( bottom face ). the bearing face 27 is adjoined by bearing faces 28 , 29 , which are at right angles to one another and to the bottom face 27 and to which corresponding side faces 31 , 32 of the cutting tip 11 , 12 , 13 or 14 are assigned . in fig5 the cutting tip 11 is shown , to represent all the other cutting tips . the perpendicular orientation of the bearing faces 28 , 29 relative to the bearing face 27 produces a secure , accurately replicable bearing of the cutting tip 11 . the exact position of the cutting tip 11 is dependent on tolerances of the tip seat 6 and of the cutting tip 11 . in order to preclude the influence of these tolerances on the accuracy of positioning of the cutting edge 21 , the cutting tip 11 is provided with a marking 34 , which is associated with a marking 35 of the tip seat 6 or with the tip seat 6 itself . the marking 34 for instance includes a plurality of groups of numerals 37 , 38 , 39 . for example , the first group of numerals 37 corresponds to a number xx of the tool body 2 that individually characterizes this tool body . all the tool bodies of a given tool model can be provided with an individual number xx , which uniquely identifies the tool body and distinguishes it from other tool bodies . the second group of numerals 38 is for instance a number that identifies the tip seat . in the present example , the profile milling cutter 1 has a total of 8 tip seats , so that a number between one and 8 can serve as the second group of numerals 38 . optionally , a final group of numerals 39 can represent the number of the set of cutting tips to which the applicable cutting tip 11 belongs . it can be assured in this way that only cutting tips belonging to one and the same set of cutting tips will be mounted on the tool body 2 . the tool body 2 is provided with the marking 35 on or beside its tip seat 6 and the other tip seats , and this marking represents at least the number xx of the tool body in the form of a group of numerals 37 ′ and the number yy of the tip seat in the form of a group of numerals 38 ′. in addition , a numeral or group of numerals pp can be provided on the cutting tips 11 through 14 and 11 a through 14 a ; it serves to identify the profile , or in other words the blade form defined by the cutting tips . one and the same tool body 2 can generate different profiles by being equipped with different cutting tips . the production and use of the profile milling cutter 1 is as follows : in production , the tool body 2 , at its individual tip seats , is first provided with individual identification numerals xx and with numbers yy . the numerals xx identifying the tool body can be disposed on each tip seat or at a single other point . they are engraved , for instance . sets of cutting tip blanks put together from cutting tip blanks are assigned to the tool body 2 ; they include one cutting tip 11 , 12 , 13 , 14 each , still in the form of a blank , for each tip seat 6 , 7 , 8 , 9 . each cutting tip blank is then provided with a marking 34 , which as a group of numerals xx represents the number of the tool body , as a group of numerals yy represents the individual tip seat , and as a group of numerals zz represents the number of the cutting tip set to which it belongs . once each cutting tip blank has been installed in the respective tip seat assigned to it , the tool body is received by a precision grinding machine , and both the cutting edges 21 , 22 , 23 , 24 and the corresponding cutting edges 21 a , 22 a , 23 a , 24 a are defined with positional and shape precision , in that the corresponding faces of the cutting tips 11 , 12 , 13 , 14 ( 11 a , 12 a , 13 a , 14 a ) are ground on their corresponding faces . to that end , the cutting tips 11 , 12 , 13 , 14 are ground for instance on their tool faces , and if needed also on their chip faces . after the grinding operation , the cutting edges of the profile milling cutter 1 exist , with the requisite accuracy . the cutting tips 11 , 12 , 13 , 14 and 11 a , 12 a , 13 a , 14 a are now removed again , and the cutting tips of the next set of cutting tips are installed . these cutting tips have again been provided beforehand with a suitable marking . in this way , gradually , all the sets of cutting tips are mounted on the tool body 2 and precision - ground and then removed from the tool body 2 again . after the grinding , the cutting tips 11 - 14 a of the individual sets of cutting tips are subjected to one further treatment . this can be , for instance , the intentional rounding of the cutting edges and / or the coating of the cutting tips with a layer of hard material . the layer of hard material is a few micrometers thick , for instance , so that an accuracy of ±{ fraction ( 1 / 100 )} mm , for instance , attained by the grinding machine is not impaired in the least . once all the post machining operations on the cutting tips have been completed , the tool body 2 is shipped with the sets of cutting tips . a first set of cutting tips can already be installed in place by then . the profile milling cutter 1 can be used immediately for precision machining operations , such as finish - milling of suitably shaped slots . once the cutting tips 11 - 14 a are worn , the cutting tips from the next set of cutting tips are simply installed ; cutting tips with the groups of numerals xx , yy are in each case mounted on the tip seats that have the same group of numerals xx , yy . in this way , in the cutting tip installation , the accuracy obtained by the fine grinding is reproduced with regard to the position and shape of the cutting edges .